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What is fertilizer grade?

April 26, 2017fertilizer grade

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What is fertilizer grade?

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Fertilizer grade refers to the guaranteed content (analysis) of plant nutrient/s in a fertilizer. That is percentage of the major plant nutrients; NPK in that order, present in a fertilizer reflects the grade of that fertilizer. Thus 14-14-14-fertilizer grade refers to the fertilizer guaranteed to contain a minimum of 14% nitrogen (N), 14% of phosphorus (P2O5) and 14% of potassium (K2O).