Nutrient
The total nutrient content of compound fertilizer is generally relatively high, and there are many kinds of nutrient elements. One application of compound fertilizer can supply at least two or more main nutrients of crops at the same time.
Uniform structure
For example, ammonium phosphate does not contain any useless side components, and its anions and cations are the main nutrients absorbed by crops. The nutrient distribution of this kind of fertilizer is relatively uniform. Compared with the powdered or crystalline unit fertilizer, the structure of the fertilizer is compact, the nutrient release is uniform, and the fertilizer effect is stable and long. As there are few auxiliary components, it has little adverse effect on the soil.
Good physical properties
Compound fertilizers are generally made into granules, have low hygroscopicity, are not easy to agglomerate, are convenient for storage and application, and are especially convenient for mechanized fertilization.
Storage and packaging
Since compound fertilizers have fewer side components and the content of effective components is generally higher than that of unit fertilizers, it can save packaging and storage and transportation costs. For example, every 1 ton of ammonium phosphate stored and transported is approximately equivalent to a total of 4 tons of superphosphate and ammonium sulfate.
