ISO9001 quality certificate Test N, P, K, Test humic acid,organic matter,salinity,and PH in the soil, fertilizer and plants Product description:Soil Nutrient Analyzer can quickly test the N,P,K organic matter, salinity and PH in the soil, fertilizer and plants, The machine can store and print data, has complete chemicals which are for free at the first time. Characteristic:Can quickly test N,P,K ...