1.Test N,P,K in fertilizer and organic matter in soil, in the plants. 2.Test PH and ... nutrient tester can quickly test the N, P, K, humic acid , organic matter,salinity, and PH in the soil, fertilizer and plants ... by computer.1.Quickly test the N, P, K, humic acid , organic matter, salinity, and PH in the soil, fertilizerand plant2.With ...