Fertilizers generally don't contain an acid. They are made up primarily of three macroingredients: nitrogen, phosphorus, and phosphate. There are also numerous microingredients.However, nitric acid can be used as a fertilizer. There is another one that comes from banana peels I do not recall the name of. I thought it was tanic acid but did a search on that and nothing came up so I have the name wrong.
Humic acid, also called fulvic acid, is organic matter such as leaves breaking down and adding nutrients plants need to the soil.
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Phosphoric acid ( H3PO4). Actually, its potassium salts K3PO4, K2HPO4, KH2PO4.
Fertilizers generally don't contain an acid. They are made up primarily of three macroingredients: nitrogen, phosphorus, and phosphate. There are also numerous microingredients.However, nitric acid can be used as a fertilizer. There is another one that comes from banana peels I do not recall the name of. I thought it was tanic acid but did a search on that and nothing came up so I have the name wrong.
Humic acid, also called fulvic acid, is organic matter such as leaves breaking down and adding nutrients plants need to the soil.
Usually they do not contain acids, but when they are added to the soil they react with colloids in the soil and as a result acids are produced.
Which acids depends on the fertilizer. Look at the "anions" in the formula of the fertilizer and add hydrogen to that to get the formula for the acid.
Example: K2SO4 has K+ and SO4-, if you add H+, you'll end up with H2SO4 as the acid produced (the K+ displaces the H+ from the soil colloid)
I think it's a form of sodium sulfate
Edit: I was taking a wild guess, trying to remember my chemistry from long time ago lol The answers at the bottom are very interesting!
acids? hydro urea (which is basically the solid part of PEE)