How to prepare mixed fertilizer

In order to save labor and improve work efficiency, several fertilizers that can be used together are often mixed temporarily or mechanically before use. However, when mixing, the amount of different fertilizers should be calculated according to different crop types and soil fertility levels to meet the expected requirements. In order to prepare mixed fertilizer with nitrogen (N), phosphorus (P2O5) and potassium (K2O) as 12-6- 12, urea (a) and phosphorus (P2O5) 14 containing 46% N were used.

N/a+P2O5/b+K2O/c+D= 1 where D is the additive when the mixture is 1 ton. Solve the above formula:

12/46+6/ 14+ 12/60+D = 10.26+0.43+0.20+D = 1d = 1-(0.26+0 .

That is to say, to prepare 1 ton 12-6- 12 compound fertilizer, 260 kg of urea, 430 kg of calcium superphosphate and 200 kg of potassium chloride are needed, and auxiliary materials such as dolomite powder without nitrogen, phosphorus and potassium are added 1 10.