Definition Fertilizer Grades (N-P-K) High N: Fertilizer more than 20% N less than 10% P & K (e.g. 24-2-4) High P: Fertilizer with more than 15% P and less than 10% K (e.g. 20-27-5) High K: Fertilizer with more than 15% K and less than 10% P (e.g. 10-0-20) High P & K: Fertilizer with more than 15% P & K and less than 10% N (e.g. 9-15-20) Balanced: Fertilizer with equal amounts of N, P, and K (e.g. 10-10-10)