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In fact it has only been over the span of the last few centuries since the Industrial Revolution, that a clearly obvious technological phase transition has occurred. Thank you very much for your continued effort and improvements. ODC is now a standard for pesticide -free aeroponic growing and organic farming. I am a greethumb - just getting my feet wet in Hydroponics. Egorov 2 , S. Spiridonova 1 , K.

Dr. Fuhrman’s Aggregate Nutrient Density Index (ANDI)

Defining Powerhouse Fruits and Vegetables: A Nutrient Density Approach

For example when I have a custom fertilizer substance that also contains triacontanol, and I want to use that in a mix, but Hydrobuddy would not want to use it because it thinks it's better to supply the whole K with KNO3.

An even better solution would be to have spinbuttons by the elements, and even by the gross errors for different elements. For example N, 50P is the goal but the closest match Hydrobuddy could find is N, 75P, by adjusting the gross error it could find an other match that fits or closer to P instead of N, like 80N, 50P.

However the spinbutton feature will NOT be implemented since the program does not "solve for an element" but simply finds the best mathematical solution to the problem.

Hydrobuddy's solution is the best mathematical compromise between all values it does NOT solve for any particular element and therefore changing from the best solution to one that favors a specific element is not possible. However I have implemented another small feature which allows you to change the element used as "degree of freedom", something which may allow you to obtain solutions that favor different elements depending on your substance inputs.

The newly implemented features will be released with the next version during next week. Hi Daniel, I'm having problems running your program.

Either way I can't get it to run. Please advise if I need to install some runtime. Hello CristalLattice, Thank you for your comment: Please email me a screenshot of the error to dfernandezp at unal. Hi Daniel, I'm sitting here at home, busy on the net, and thought I'll give your prog another try and bang!

The solution or problem is the firewall at work and the fact that I'm not always connected to the net at home. It seems like your auto update routine is causing an error if it can't get through to the net. Fix that and I'll be able to play with your neat prog at work.

I need to as it looks like I'll need a few hours to learn how to use all the advanced stuff. Keep up the good work and thanks for making it free! Hi again Daniel, Quick fix: Hi CrystalLattice, Thank you for your reply: Thanks you for helping me make the software better, Best Regards, Daniel. Hello Everyone, Thank you for all your help and feature suggestions: The next release v1. Here is a copy of the changelog: By selecting a given weight within the substance selection screen the program will use a certain minimum weight as a constraint.

Also those of you who were having trouble with the update. Please post any bugs, suggestions or feature requests for the next version: I am not sure if this is an error in your database or if we have a different product?

Also, I was surprised to see that your Borax contained Fe. Again, is this an error in your database, or is it something that actually exists in Borax? Hello Doug, Thank you for your comment and for noticing these bugs: They look very nice.

The auto-update downloaded the zip file and opened a command prompt window which just sat there for a while. But when the command prompt closed and I clicked on HydroBuddy icon again it still said I had to update. It looked like some of the files were updated since the date changed on them.

I did have a zip file in the directory. Is that how you're supposed to do it? Maybe on a future update you could split that in the database and have fields for formula name, source, and notes.

The notes could tell you things like "For tomatoes grown in Perilite using drip irrigation in Florida greenhouses". I noticed you now sort the formulation names in the list which is a nice feature.

I haven't tried the "use this minimum amount of substance" feature but it sounds interesting. Another thing I wish for is a "maximum ppm". Mainly for Cl since I try to keep Cl levels under 75ppm in my formulas. Na might be another one to limit. I eagerly wait to see the cool stuff you put in the next version! Hey Daniel You have a great program here. I do have a question about liquid products that are given as grams in the tank breakdowns.

For example Nitric and Phosphoric acid are obviously liquid products but the recipe is given in grams. How can I work this out to get the correct L or fl oz number? Am I just missing something here? Thanks for your help Ian. Hey Ian, Thank you for your comment: Hello Michael, Thank you for your comment: I have taken note and will correct this within the next update, Daniel. Regarding the EC values, they are calculated using a semi-empiric approach based on some simple mathematical manipulation of limiting molar conductivities.

You can checkout the code to find out exactly how this is done. I got this to run in Ubuntu In case anybody cares So far it works fine. Hello Tester, Thank you very much for your comment: However if you see any features on commercial software currently missing on HydroBuddy please let me know so that I can add them to future versions. Thank you very much again for your support: Adding acids liquids by volume instead of their weight would be useful too, I have the density tables if you are interested.

At the water page, a conversion between GH, total alkalinity etc would be useful too. Regarding the acids, I am a little bit reluctant to do this since it would require the addition of at least two additional fields to the database a density field and another field to know whether something is a liquid or not so I would need to develop a whole database field updating solution which I don't have yet.

However if I have the time I might be able to get this done: Regarding the water page, it has the same field problem regarding the water quality database but again, if I have the time I'll get it done: Feel free to leave any additional suggestions you may have!

The update will also keep your database records intact so you will not lose any of the information you have gathered. Please let me know about any other features you might consider useful: Thanks for the software Daniel!

Quick question, I am adding a custom substance, L-Arginine, a common amino acid and am unsure of whether to list it as a nitrate or?? Also curious as to how the cost and purity tabs play into the formulation. Thanks for all your hard work. Hello Cue, Thank you for your comment: The cost value doesn't have any effect on overall calculations but it is merely a feature to help you know the total cost per preparation.

Simply input your cost per kg and the program will print the cost for the substance for each preparation under the last column of the results tab the cost column. Purity does affect calculations directly, the more impure a substance is the more has to be added to reach a certain threshold requirement. Please read this article so that you understand what purity is: Daniel, I am getting the following message when carrying out calculations "Gross errors on Fe are too high, probably an adequate solution was NOT found.

This happens whenever you use too many substances or your substances are a very inadequate match for the formulation you want remember that not all salt choices can generate all formulations due to the fact that achievable proportions are fixed within your salt choice. If you want you can post a comment with your salt selection and formulation or send me an email to dfernandezp at unal. Thanks again for your comment: Hello Everyone, The latest update for HydroBuddy v1. Custom nutrient ratios can also be calculated besides the defaults.

This is very useful for nutrient solution evaluation. Future versions will use this values to warn users about potential problems. Feel free to leave any bug reports, feature requests or suggestions, Best Regards, Daniel. Try reinstalling the program to fix this problem. The new version looks nice. I like the grid display on the results tab. That is a lot easier to line up substances with their amounts.

One issue I'm seeing is if a substance isn't used it gives the "not used" pop up but then gives an error box saying "" is an invalid float. Press OK to ignore and risk data corruption. Press Cancel to kill the program. Pressing OK doesn't appear to hurt anything and you do get values on the results tab. But it makes me wonder if I'm silently corrupting the databases I also noticed the cost information for the substances was over written with the default instead of migrating any user supplied values.

I found all the "database updated" pop-ups really annoying after the 10th one: Hello Steve, Thank you very much for your comment: Regarding the errors, I will look into the "not used" pop up error you mention and see if I can reproduce it, probably the error is related to some of the StringGrid changes I carried out.

However rest assured you're not corrupting the database. I will also correct the cost overwritting issue. Thank you very much again for helping me make the software better: X Tiger downwards compatible. Many especially old school folks do not have necessarily upgraded to Leopard or Snow Leopard perhaps Lion yet. Hi Jean-Luc, Thank you for your comment: You can use this binary to run Hydrobuddy natively on your Mac. Hello Guys, I have just updated HydroBuddy to v1. This release is the culmination of a lot of effort: The program is now installed using a Full fledged installer that makes installing easier on all the different platforms: Thanks again for all your help and support: When clicking "GET H.

Only if clicking the Button while holding cltr, the file can be downloaded when choosing "download file as" from the pop up menu. Although Firefox downloads the file directly, the installer is corrupted and does not show up with the proper icon and without the. I even tried to add the. Please compress the installer on the OS X machine in either. Otherwise the installer will obviously get corrupted in the process.

It's a classic problem with uncompressed UNIX executable files and it can only be solved as described. Simply go to the directory where the installer is within a terminal and execute the command. I have confirmed on a few Macs that it works this way. Thanks again for your comments, Best Regards, Daniel. Hello Jean-Luc, I have created a proper.

Just download the zip file and you should be able to execute the installer right away. Please bear in mind that shortcut creation and end-of-install execution is not working yet on Macs and Linux so you'll need to browse to your install folder to execute HydroBuddy.

I hope this is much easier now: And usually I have NO trouble ever with installers, unless they say they say that the version is incompatible with my system. Any app can be easily dragged and dropped afterwards to "the dock" manually in a second. And again, as for the previous way to install via the terminal unix shell: I am not picky and Mac user since over 20 years.

But that was kind of a tall order for any average Mac user. With the terminal open, although the command line was correct and I managed to type it in - I got a permission denied message, when trying to run the installer - obviously as I was logged in as an user, not as a admin or superuser ;-. Therefore it is hard for me to provide support for older versions.

In any case the installer should be executable through the command prompt as I described before. If you keep having trouble with this installer send me an email and I'll email you a standalone copy of the hydrobuddy. Hi Mick, Thank you for your post: Thanks again for helping me make the program better, Best regards, Daniel.

Daniel, Love your product! I've tried the windows and linux versions and they work perfectly! My question is, how do I add trace element mixes as an custom substance? Hello David, Thank you for your email: Regarding your question, simply go to the substance selection screen and click the "Add Custom" button.

After you do this you'll be able to enter the composition percentages within each element's box. After this you'll be able to use it in calculations either to know how much to add for a given formulation or to know the resulting ppm by setting a weight using the "set weight" button after setting the calculation to "Concentrations from Weights".

I hope this helps you with HydroBuddy: Thanks for the reply. The only problem is it keeps giving me a high Cu. My book Soil Fertility and Fertilizers 7th Edition say that normal Cu concentrations in plant tissues range from 5 to 20 ppm, however soil concentrations average around 9ppm.

Does that mean having 2. Hi David, Thank you for your reply: You would need to have only 0. It is probable that your fertilizer is not geared for hydroponics but for soil use and for this reason copper might be higher foliar fertilizers are usually very high in copper to aid in fungal disease prevention for example.

This fertilizer might NOT be appropriate for hydroponic use if it has such a high Cu concentration. Thank you very much again for your comments: Hi Daniel, How much should i dilute the Nutrient solutions when the outside temp is high and the humidity is high.

What is the relation between temperature and the concentraion of the nutrient solution. Will the nutrient soultion composition or concentration change with changing temperature for vegetables. In my area the temperature is always between 23C - 36C with high humidity.

Please advice the best option to grow vegetables. Hi Praveen, Thank you for your comment: There are many forums within the web where you can find people who will be more than willing to answer your questions.

Please limit future comments on this post to matters dealing with HydroBuddy, Best regards, Daniel. Hi Daniel, Firstly i must thank you for the software, as it has tremendously help me understanding and creating the nutrient i required. But, with the new Hydrobuddy v1. Same thing happen i download on other computer. I sincerely appreciate if you help to resolve this problems. Once again Thank you.

Hi Alsagaff, Thank you for your comment: Please specify the version of windows you're using. Try the following steps to see if the problem gets fixed: Also please ensure you're installing HydroBuddy using the latest installer. Thank you very much again for your comment, Best Regards, Daniel. Hi Daniel, Thank you for your feedback. I will try base on your suggestion and shall get back to you soon.

Daniel- Awesome to see a release for OSX! However, I am having difficulties adding custom substances. I get an error message looking for a. Please post the exact error you are getting. Thanks again for reporting the problem, Best Regards, Daniel.

Hello tester, Thank you for your comment: The above mentioned effects cannot be easily predicted so I would not dare include any sort of solubility based criteria. I'm just wondering if you have had any issues with this. Hi Cue, Thank you for your comment: I opened HydroBuddy this morning to find all substance edits erased as well as the formulations I added to DB. Upon adding and editing them all back in over the last hour I was able to close the program and reopen the program with all the information being retained.

Most probably there was some sort of permission issue which caused the databases to be rewritten the first time you modified them. Let me know if the problem happens again, Best Regards, Daniel.

We are running on Windows 6 bit and seem to be getting a file corruption error. Hi Kirk, Thank you for your comment: If the file is not located then try to reinstall to another folder. All, I can now confirm that on Windows 7 bit, running Hydrobuddy as admin solves the problem. Hi Daniel, I admire what you are doing for the Hydroponics lover that I refuse to accept not having HydroBuddy on my laptop. However, i still encounter problems after installing HydroBuddy v1.

When i tried to start the program the following remarks appeared "Unable to open file "C: I appreciate your assistance. Thank you in for you assistance and support. If the file is present then try to execute HydroBuddy as administrator to see if the problem is solved. Please let me know if you're able to solve the problem, Best Regards, Daniel. Hi Daniel, I just found your website and downloaded Hydrbuddy and couldn't wait to try it.

I can't open the program, keeps saying can't find a useable init. Did the download again and same message. I really want to try your program. Thanks for any help.

Hi Sue, Thank you for your comment: Please specify which operating system version you're using and when the error is appearing so that I can help you solve it. Thanks again for your interest on HydroBuddy: I can't get Hydrobuddy 1. I'm running XP Home s. When I run the installation, I get an error while it's trying to build the uninstall. Error during trunate on file 26b Looks like it might be a useful program. Hi Chris, Thank you for your email: I will make sure this works appropriately within the next release.

Thanks for helping me make the software better! Thats exactly what Iam! Pretty cool from what I can see. Heard great things about the Hydrobuddy from a client Tried going in installation folder but there was no folder to go in. Any help is appreciated Daniel. Hi Michael, Thank you for your comment: I will work on this for the next release but in the meantime there is no quick solution to the installer issue. In any case I will also make the next Windows version compatible with emulators like CrossFire so if the installer still doesn't work you will probably be able to use it this way.

I have just sent you the standalone executable which you can use to run the program on your Mac without a formal installer. I hope this solves your problem: Hi Daniel, is it possible that Hydrobuddy starts with the last entries made before closing the program instead of starting with default values? I also saw a small error on the Results tab and also on the "Detailed Per Substance" Hi Robert, Thank you for pointing out this error: Hi David, Thank you for your comment: Hi David and Daniel!

Eventually there was some to and fro about how to determine the density of individual products in some case. Just out of curiosity ;-. Advanced Nutrient's tech support wrote this in an e-mail: Now that's interesting tester, because that's what I assumed in the first place.

Simply look at the way the maths are made up "traditionally" in HydroBuddy as well for instance. Once again I was right was I? Besides, assuming a density of around 1: Majority may in some case just be a way to impede progress! I guess I am staying on too long with the wrong people.

Except of course if it's variable. Because most people will not be able to make a choice on their own and get confused by the two options. I just wanted to know how to copy these values into HydroBuddy so I can mix my own. Ps in HydroBuddy Mass units grams or Ounces selection.

When I go to Results after calculation. Mass still indicates grams even though the actual weights change acording to my selection. David, as far as I am concerned, I don't feel confused by you or your question. This part seems confusing by itself. I also got your point and understood your question. But this is still tricky to me - please correct me if I got it all wrong ;- PS: In case you need to determine density of a liquid fertilizer , take measure ml and weight them with a precision scale.

If the weight is Or use 1 Liter and move the point probably even more precision. After downloading the system to Windows 7 , I have the desktop icon 'HydroBuddy' and on clicking this I get the error message I have no idea what it means and if this is something in my system then I can take it to a programmer to look at.. A What is the procedure to add a custom salt, I am a layman to this, thank you. I believe this feature would allow the novice and expert grower the opportunity to combine their own formulations with those commercially available in a way that will potentially save millions of dollars by avoiding nutrient deficiencies and overdoes.

As they're harmful and actually after detaching start chelating materials from the cell walls of your plants. Hi Daniel, Your hydrobuddy calculator seems to be the perfect aid for my senior science project.

I would like to investigate the effect of various nutrients on the growth of tomato plants. Can you suggest an experimental design? Then assess the growth of the plants for around 4 weeks. What medium would you suggest i grow them in? To simplify things, for my base solution i have chosen to use the "Tomatoes - Third Cluster U of Florida " throughout my experiment.

Does this sound okay? Also, when trying to make a solution deficient in potassium, i set the nutrient to 0, but it does not give me 0 potassium nitrate grams. Any help or suggested further reading would be greatly appreciated, Kiran.

Hi Kiran, Thank you for your post: Simply eliminate potassium nitrate from the salts you will be using. Regarding your solution choice, it is better to choose one of the generic solutions rather than this, more specialized one. Select a generic solution from the formulation list. Also remember that you need to cover genetic variability for your conclusions to have any validity, you also need to ensure that you have one separate reservoir for each plant and make sure they all have the same temperature, light and humidity conditions.

You need at least tomato plants for each element you want to study if you want to draw serious conclusions. Of course, if this is just to see the generic effects of deficiencies one plant per element and at least 3 controls will do make sure you have more than 1 control because genetic variability may cause a single control to be a bad source of comparison.

If you want to completely eliminate genetic variability you can grow a single plant and then use cutting from that plant to grow new ones to carry out your study. They will all have the same genome then. I just downloaded this program and it seems really nice, but after closing the program after the initial startup and reopening it I get this error message Unable to open file "C: If I click either Ok or Cancel it just closes the program Not sure whats going on here..

If I run it as administrator the program works fine. Having a problem with GTk I get this message. Thanks for your great work. If i download gtk from sourcforge and copy zlib1. It is probably the rough way of fixing this but it works. Just a couple questions When I am to copy a commercial formulation, when addition as volume is selected I have two options Now, what do these both mean, and what should I put in the box? Thank you so much for a great program.

With any attempt to reproduce commercial nutrients, you have to transcribe the GA guaranteed analyses from the manufacturers labeling to the program as you know. After that Daniel needs to tell you what option to chose in either case. In rare cases, where specific components need to be used, to be able to have a SINGLE part additive , you firstly need to figure out what they actually are. Can you please include an SiO2 calculation instead of Si only in custom compounds please..

Hello Guys, I have the pleasure to announce a new release of HydroBuddy: The program now uses the windows interface as it used before. Thank you very much for all your support! I hope you enjoy this release: Just tried to launch vers. Open failed - couldn't open "HydroBuddy The good news are: Just giving feedback here. Hi Jean-Luc, Thank you for your feedback: I am however glad that the Windows version returned to its emulator-compatible state: Hows my raw salt formula look?

Hello, Im really liking the new release!! There still is a problem with SiO2 calculations.. I added a custom compound potassium silicate HB doesnt calculate the SiO2 and doesnt add the potassium this compound contributes.. I still have to use another calculator to get my formula right Hi Mindzeye, Thank you for your comment: I just used the program to calculate a formulation based on potassium silicate and obtained adequate values for the silicate as well as its potassium contribution, you're probably not using the program correctly.

Thanks again for commenting, Best Regards, Daniel. I got the support I needed It was just the purity of my custom compound that was throwing my numbers off.. Thx for the wonderful FREE program! Nutrient solution composition problem - Hydroponics Forums Discussions. But I do know of a free nutrient calculator that might be able to help figure things out. Currently getting an error window that says missing operator between "Joe" and "Joe" when I try to save or set water quality parameters.

Hi Joe, The problem might be that the name was already in the DB or some other issue with this name. Simply redownload the program and reattempt this or add the quality parameters with a different name like joe1. I hope this helps, Daniel. Downloaded and installed the program with one problem. I receive the following error when trying to open the program: I reinstalled a fresh download and it worked fine until the message appears when trying to reopen after closing.

I'm using Win7 bit. Also any plans to create a iPad version. That would be really handy. Hi Kevin, Thank you for your comment: Also there are no plans for an Ipad version but the source is available if you want to build one yourself send it to me if you do so that I can add it to the website , Best Regards, Daniel. Resh's book and your result when figuring for Ca.

When figuring for gallons, everything except Ca was accurate. Hi Kevin, HydroBuddy's results are accurate according to whichever Calcium nitrate formula you're using. You should add another calcium nitrate if your source is different. HydroBuddy has been checked extensively and I guarantee the amounts calculated are correct for the calcium nitrate composition percentages and purity used.

I have noted Howard Resh sometimes uses anhydrous calcium nitrate in his calculations, reason why weights are reduced. Daniel, Thanks for the info. I checked my supply and it looks like I have a green house grade bag of calcium consisting of 1. No wonder my plants are having trouble. If you know a good source, please post. Thank you again for your help. Just input a custom "calcium nitrate" within HydroBuddy and use this custom addition to calculate your nutrient solutions.

There is really no benefit in spending so much for the Tetrahydrate unless you absolutely need to have all absence of ammonium note that ammonium is proved to be beneficial for at least a dozen plant species under 1: Hi Daniel, I tried to search for the answer but didn't find one so I will ask here, I hope this is the last one If you are set on having this formulation then you need to change your salts to others that have ratios which better suite the intended preparation.

However it might be better to just change the formulation to another which is more in line with your salts if you do not want to purchase new ones. Daniel, That's what I thought. I used an unaltered db formula for an example and will make the adjustments when necessary when looking at the others.

In Resh's book he has some tables that address this issue and I will work on it. I have tried substituting other salts, but it seems to make things worse.

Here is an example: Thanks, Kevin Thank you. Hi Kevin, The problem here is that your formulation does not match the ratio of S to other element on your salts. Sulfur is the degree of freedom so the program is sacrificing accuracy in S in order to reach accurate results on other salts.

If you want to have completely accurate S then try changing the degree of freedom to something else related to S possibly Mg or K in order to see how this changes your overall formulation.

Adding sulfuric acid should allow you to get much more accurate results on a formulation were S is lacking. Hi Daniel, Seems like I get the following pop up message each time I run a calculation on any of the Db: Melons Douglas Peckenpaugh , the message for each salt states "You have selected a fixed weight for Magnesium Sulfate Mg.

The program will find a solution with this constraint but it will add more of this substance if it will lead to a better solution. It occurs on every Data Base selection.

Hi Kevin, The program will always pop this message if you have selected a fixed weight of any salt. If you want to remove this message simply remove the assigned weight using the reset all weights button on the selection screen. Hi Daniel, Thank you for your help. The only compound I'm having trouble obtaining is Ammonium Nitrate due to restrictions.

I need it for Resh's Peppers. I have tried various substitutes but nothing seems to fill in the void for Nitrogen like Ammonium Nitrate does, it actually does a nice job. Do you know any sources that will sell to me? I have tried two of mine and each one said "no". You can get the exact same effect. However be careful as both of these substances are corrosive and should only be handle in well-ventilated spaces with adequate protective gear also never mix the sources together but add the needed quantities separately to the nutrient solution.

I hope this helps! They obviously will provide P as well, but that's not a problem in most cases. They should still be available as well and are much less corrosive. Common ammonium nitrate is was only preferred because it formerly was freely available and used to be very cheap much cheaper than MAP or DAP. About the previous "problem" with the lack of S in Resh's recipe: The latter is actually needed to reach the high P to N ratio.

Thus the high S content in this recipe is NOT actually required but a simple consequence of the used amount of potassium sulphate. Thank you both for the help. I actually tried placing ammonium sulfate and nitric acid into the substance field and it showed very favorable results also. Daniel do you plan on adding a forum so information can be shared? I'm currently planting Tomato's, Edamame, Melons, Eggplant, Sweet peppers, and Strawberries using the formulations derived from Hydrobuddy and other sources.

To use your program on a PowerBook G4 It is on my desktop, when i click on the install it opens Terminal. Any help would be greatly appreciated. When I try to Remove selected data point: Either way, when I try to add a point to the data set, I'm told A data set must be selected or created. If I press delete while having the name of the data set marked, I get an error: When pressing around the program just crashes. I am a greethumb - just getting my feet wet in Hydroponics. I stumbled upon your site thru fellow bloggers.

It is too technical for novices like me. But i am writing this for something else. Words cant explain the gratitude we guys owe you. I salute you - and your ilk. May your tribe grow. I seem to be having some problems running your calculator program I'm trying to run it on a windows 7 home basic pc: Hi Cesar, Thank you for commenting: This fixes the problem, Best Regards, Daniel.

I thought this looks pretty interesting. Daniel Fernandez Do you have a twitter account? If not, will you sign up for an Account? Why am I asking this question?

Cause I think that following your site maybe more easily by bird. On the other hand, thank you so much for this great program and effort. I will be donate when I will see and eat my first strawberry plants in this summer. Is the 'Yara' brand of Calcium Nitrate fully 'anhydrous'?

Or is there another reason? Therefore the proportions change and the calculations give different results. Please checkout the percentage composition values of each salt by simply editing them within HydroBuddy.

I've downloaded the program for use on windowss vista. I made a donation first time seeing program. My question, isthere anyway to print results to take to workig table for measurring the weights of salts.

Hello Gary, Thank you for your comment: Thanks again for posting! Hi Daniel I have had a look at your program and used it, a very well put together program. However when I try to reopen the program after logging off I get the following: Unable to open file "C: Is there a fix for this Bug?

I love the program and so far it seems to be functioning well for me. I have a similar problem with the availability of ammonium nitrate. I know nothing of chemistry so I'm not sure if the following components could be safely mixed and was wondering what procedure you would suggest to do so: Basically I don't know the best way to combine these without causing damage or some kind of other unwelcome result.

Will the use of the 2 acids be a problem? Also some bugs I've noticed: The numbers seem to change to the correct ones but the units don't display properly and that could be a big problem for someone if they don't notice.

It would be smoother if those were all brought into order. I copied the formula from Dyna-Gro's "Foliage Pro" minus the micro nutrients for which I will use a commercial formula. I believe this requires me to use the Nitrates to keep everything mostly in solution.

The foliage pro had a tiny bit of precipitation that went away with shaking and I assume this will do the same. Nitric acid seems almost as hard to come by where I am as ammonium nitrate is - do you have any suggestions? Is this because we can't mix the 2 acids? Or is something else going on? Daniel,Program looks great, but being a novice I need help. I wish to copy a commercial formula. I then hit Calculate Formulation. It then returns to the Main window but no sign of the formula.

In Add Product for comparison window ,nil results. Nutrients for 3rd world countries - Hydroponics Forums Discussions. I also have a problem reopening your calculator. I tried to do what you previously suggested but cannot find the right tabs. Hope to enjoy your calculator like everyone else has Regards Fred.

I suppose the database is using ' as a separator. It would nice if you could encode the ' characters or use a different separator so that things like "Peter's Professional" products and etc don't crash program if I forget and accidentally put a ' in there. It would be nice to be able to lock in certain levels of chemical components. In the formula I'm attempting to replicate I can tell I will need X amount of an acid to get to the required pH but HydroBuddy wants to use less of the acid and more of the salt with the same element.

I'm sure there are multiple solutions and I'd like to use the one with the higher acid content. In addition to locking in certain values for substances it would be great to be able to put min and max values on the levels of substances.

Hi RedShirt, Thank you for your feedback: Then if I go back and do the calculation in Mass ounces I am told I need What is the correct result to use? Hi Daniel ,David again. I uninstalled Hydrobuddy then downloaded and installed it again. Presto, it now calculates correctly. In the results the Mass still indicates grams even if you change the Mass units to ounces. Daniel,Could you please recommend a nutrient formula from the database most suitable to cover the three following vegis,Lettuice Coliflower and Cabbage?.

Also,is it possible to determine when to replace the nutrient by the EC value? Hello Daniel, Firstly, thanks for your work on this application! I have yet to dig into HydroBuddy, I was waiting for the update you wrote was to be released on July 6th, re: When will the update from v1.

I have the full version of Nutron software http: I paid for the software and it's not installed on my boxes, so it's not copyright infringement. So far, from reading about your application and it's features, I see it's better than Nutron Hello Spurr, Thank you for posting: HydroBuddy is developed on my free time as it is an open source free project so I only make developments whenever my work on other projects is low.

I developed Hydrobuddy with the idea of making the best software out there for hydroponic calculations so hopefully I am achieving this goal: Hi again Daniel, I have a couple of feature requests pertaining to v1. And the ability to drag the window to custom size s would be great. Hi Spurr, 1 I cannot implement this since Lazarus the programming software I use currently has a bug around dynamic scrolling and window resizing.

I will implement this once they fix the problem but it may be years before this happens. Okay, last request for now, I promise!

I ask for this because one should use Windows from a Guest account for security purposes; and as of Hydrobuddy v1. It wouldn't be a big deal for me because I could simply make a shortcut from the. If I run Hydrobuddy. Hi Spurr, The installer generator I use doesn't have this option but I'll look for some solution to the problem. However most probably this will remain like this for the next few releases probably at least for the next 6 months , Daniel. Hello Daniel, Thanks for your responses, that all made sense.

So far I am very impressed with HydroBuddy, it's feature packed and pretty bug free at least that I have found. Do you accept anonymous donations? I don't use Paypal, etc. I do have another feature request, and two questions I like to use Washington State and Oregon State USA testing of heavy metals and other impurities, in commercial fertilizers, and salt compounds, when qualifying and quantifying my formulas.

I hope that question made sense, if not, I can elaborate c In the window "Nutrient Ratios", can one add custom ratio s of only two elements? I tried clicking the "Add Custom Ratio" button but it only offers relativity of three elements ex.

That is, a ratio must be two elements i. To my understanding, three elements do not a ratio make, am I incorrect? From a few academic resources ex.

Hi Spurr, Thank you for your comments: I will now answer what you have said: Any donation is obviously very appreciated to support the development of this software: It makes no sense to make a calculation that will tell you that you have 0. Making such calculations would only make sense if the person used very pure salts meaning analytical grade or had extremely accurate water and analysis of all of their used minerals and this is simply not the case for the incredibly large majority of users.

It therefore simply makes no sense to do all the effort that is required to do this as its practical usefulness is none. A ratio is simply a relationship between two or more values. A ratio between three values A: C is simply a way of showing A: C in a condensed and easy to understand manner. My email is dfernandezp unal. We know that SiO2 has However, HydroBuddy converts 7. I have noticed a few bugs while working with Hydrobuddy, ex.

That bug appears when I work my custom mix for medical C. All variables are correlated for the solver so any change in an element affects all salts even if they do not contain it in some way from a mathematical perspective when doing the matrix solving procedure.

It would be best to reformulate the mixture or use another degree of freedom to solve. Thanks again for writing, Best Regards, Daniel.

Sandy soils have fewer iron and aluminum oxides, therefore, have a lower capacity to retain phosphorus. If phosphorus is over-applied which can happen when manures are used to meet the nitrogen need of a crop , the capacity of the soil to bind phosphorus can be exceeded. In these cases, the soil no longer functions as a nutrient buffer, soil quality is reduced, and water quality can be impacted. Because soil quality affects how water moves into surface and groundwater, it plays an important role in the site management practices of a nutrient management plan.

These aggregates can help prevent soil crusting and promote better soil structure, which leads to easier root penetration, as well as improved plant growth and production. Within a soil textural class, higher soil organic matter and better aggregation will allow more water to infiltrate into the soil, reducing erosion and preventing the loss of nutrients.

The best way to determine the nutrient content of the soil is by testing. Soils should be tested every years based on the soil type and state requirements or recommendations. Soil tests usually report pH, phosphorus, potassium, calcium, magnesium, sulfur, and micronutrients. In some states, the level of soil nitrate nitrogen may also be reported. From soil analyses, nutrient recommendations can be offered based on local field trials and the experience of the land grant university.

All this information helps the farmer know how much lime and fertilizer is needed for a particular crop on a particular soil. Although soil organic matter is an important indicator for soil quality, it is often not reported in a regular soil test report.

Most laboratories can analyze soil organic matter or soil carbon. Asking for this analysis is helpful to determine if soil organic matter is increasing, decreasing or staying the same. The specifics of a nutrient management plan are dependent on soil types, cropping systems, and site conditions such as topography and hydrology.

Each state has their own specific procedures for developing a nutrient management plan based on their research and experience. It is recommended that you contact your local cooperative extension or NRCS office to receive specific guidance for your area.

Managing nutrients with inorganic fertilizers is relatively easy because nutrients can be specifically blended in the concentrations needed for a particular crop. Nutrient management can be more difficult when organic fertilizers such as manures or composts are used.

This is because the nitrogen to phosphorus N: P concentrations in organic fertilizers tend to be around 1: P need of most crops which is Consequently, when manures are regularly applied to meet the nitrogen needs of the crop, phosphorus is over-applied. Composts can create similar conditions, especially when manures are used as a feedstock.

Composting causes nitrogen concentrations in the organic material to decrease because some of the original nitrogen is lost as ammonia gas. Phosphorus is concentrated because the volume of the material decreases during composting and it does not have a gaseous from.

P ratio in compost does not match plant requirements and phosphorus can be over-applied with regular use. This process is an important step in building and maintaining soil quality. For more information on developing a nutrient management plan for your area, contact your local NRCS or Cooperative Extension representative. Iowa Manure Matters - http: Animal Waste Management - http: Best Management Practices for Colorado Agriculture: Livestock and Poultry Environmental Learning Center - http: Pennsylvania Nutrient Management http: Why use nutrient management?

Why doesn't everybody use nutrient management? Background How is soil affected? Back to top Why use nutrient management? Back to top Why doesn't everybody use nutrient management? Back to top Background How is soil affected?

In areas where wind erosion is a problem, the aggregation of soil particles by soil organic matter, can also help reduce soil loss due to wind. Excessive tillage and the lack of residues or cover crops decrease soil organic matter and increase both wind and water erosion. Part of a nutrient management plan might be to change management practices to build or maintain soil organic matter to reduce erosion or establishing buffers to remove nutrients as water moves through the buffer.

The management changes will be specific to the soil type, slope, and crops grown. The photo at right shows a conservation buffer adjacent to a crop field in Iowa. Back to top How to monitor the soil The best way to determine the nutrient content of the soil is by testing. For the best soil test results, the in-field soil sampling must be conducted properly. Individual fields should be sampled separately; areas within a field that are managed differently should also be sampled separately.

In fields with different soil types each soil should be sampled separately. Cores should be taken in a zig-zag pattern across the sample area. Sampling in this way ensures a representative sample across the sample area will be collected. Soil samples should be taken from 0 to 6 inches for row crops and 0 to 4 inches in pastures and hayfields.

A minimum of 15 cores should be taken from the areas that are less than 15 acres. For sample areas greater than 15 acres, a good rule of thumb is one soil core per acre.

Refer to your local land grant university for appropriate soil sampling protocol.

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