How is the NPK content of organic fertilizer calculated?

How much NPK is contained in organic fertilizer? Can you calculate the amount of fertilizer based on the nutrient content of organic fertilizer given in the fertilizer manual? The main characteristics of organic fertilizer are various types, complex components and difficult to determine. The specific nutrient types and contents are due to organic fertilizer. The source and degree of maturity vary. The nutrients contained are roughly divided into two parts: quick-acting and slow-acting. In addition to providing nitrogen, phosphorus and potassium nutrients for the seasonal crops, organic fertilizers are also beneficial to subsequent crops and fertilization, while the composition of chemical fertilizers is simple and clear. Mostly available for quick-acting nutrients, easy to measure and calculate. Therefore, the nutrient content of organic fertilizer provided by various fertilization manuals can only be used for reference when fertilizing, for example, to understand the main components and content of a certain organic fertilizer, to help determine the type and approximate dosage of the base fertilizer, but it is difficult to calculate The specific organic fertilizer and the amount of NPK fertilizer applied together.

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