1.Test N,P,K in fertilizer and organic matter in soil, in the plants. 2.Test ... soil nutrient tester can quickly test the N, P, K, humic acid , organic matter,salinity, and PH in the soil, fertilizer and ... .7.Armor plate shell, firm, beautiful and durable.Specification:1. Nutrient measurement technology indicators:1) Stability: A(absorbency of illumimation) drift ...