... 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 ... :Can quickly test N,P,K organic matter, salinity, and PH in the soil, fertilizer and plantsWith the function of time display ...