Regarding the Hefei issue
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I would like to ask everyone: in compound fertilizers, does the ratio 20:20:20 refer to the ratio of nitrogen, phosphorus pentoxide, and potassium oxide? Is it a quality ratio? I read in a book on flowers that, during the flowering period, it is necessary to use a compound fertilizer with a nitrogen-phosphorus-potassium ratio of 1:0.7:2. Is this ratio based on mass, or on the elements themselves? Or is it, as I mentioned earlier, a ratio of nitrogen, phosphorus pentoxide, and potassium oxide? If it is the latter, why not simply expand it to an integer and write it as 10:7:20? I really don’t understand! Also, can one prepare compound fertilizers on their own? For example, can I mix potassium sulfate, urea, and potassium dihydrogen phosphate to achieve the desired ratio of nitrogen, phosphorus, and potassium? Can this fertilizer that’s been made be used?
Seeing the title, I thought it was Hefei?
It is possible to prepare it oneself; the required ratio of nitrogen to phosphorus to potassium is 1:0.7:2. The values 20:20:20 mentioned in this formulation as well as in compound fertilizers refer to nitrogen, phosphorus pentoxide, and potassium oxide respectively. The ratio of nitrogen to phosphorus to potassium is 1:0.7:2. It is usually expressed as 1 to some value; writing it as 10:7:20 is also possible, but this approach is less intuitive when comparing different crops (personal opinion)
Huh? Isn’t it the ratio of elements? Are you sure, hero? That’s why I find it strange. It’s because, in the same book, it says to use a 20:20:20 compound fertilizer; and at another stage, to use a 1:0.7:2 fertilizer. Since it’s the same book, why are there such different instructions? Fertilization is coming up soon, and I still don’t know what to do; I’m worried