Answer: A legal term referring to the concentration of Nitrogen, phosphorus and potassium.
Explanation:
Fertilizer analysis of grade is a legal term that show the amount or concentration of nitrogen, phosphorus and potassium by volume of fertilizer product. This guarantee the amount of N,PK in a fertilizer. For example if a fertilizer product label shows 12:10:15 ,I t show that it contain 12% of nitrogen, 10% of phosphorus and 15 % of potassium.
A legal term referring to the concentration of N, P, and K by volume of a fertilizer product.
A fertilizer grade tells about the quality of plant nutrients present in the fertilizers.
Basically, it is referred to the percentage of nitrogen, potassium, and phosphorus.
It is also called NPK analysis.
The proportion of three nutrients.
Thus, the correct option is D.
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