ISO9001 quality certificate Test N, P, K, Test humic acid,organic matter,salinity, ... description:Soil Nutrient Analyzer can quickly test the N,P,K organic matter, salinity and PH in the soil ... at the first time. Characteristic:Can quickly test N,P,K organic matter, salinity, and PH in the soil ... 50HzDirect current: 18V, 5W (With tester) Function:Test N,P,K, PH, organic matter, soil PH, soil salinity, with ...