What is the main basis for rational fertilization?

We can producing the organic fertilizer or compound fertilizer granulator using the fertilizer manufacturing process hiogher efficient and we can designe different type fertilizer production line to make the fertilizer granulator.But when we use the fertilizer.what shall we notice?What is the main basis for rational fertilization?Firstly,the nutrientional characteristics of crops should be considered.Different crops or crops have different requirements for the types,quantities and other proportions of nutrients in different residual periods.
Secondly,fertilization must be carried out according to the nature of the soil,in which the content of ntrients in the soil,the ability of fertilizer conservation ad supply,and the existence of obtacles are important considerations.
Thirdly,he relationship between climate and fertilization should be considered.Climate affects the effect fertilization,and fertilization affects the adaptation and utilization of crops to climatic conditions.
In addition,fertilization must take into account the coordination with other agricultural technical measures.

The fertilizer machines are used to make the fertilizer are designed for different type .For example,the fertilizer granulator machine type to make the organic fertilizer granulator or compound fertilizer granulator.
We are as the professional fertilizer machine manufactuers,we design and produce the fertilizer machines and then we also design the different type fertilizer production line to make the organic fertilizer granulator or compound fertilizer granulator.Like the npk fertilizer production line is designed for producing the npk,compound fertilizer granulator.