... , P, K,humic acid,organic matter,salinity,PH in the soil, fertilizer Soil Nutrient detectorTest N, P, K,humic acid,organic matter,salinity ... N,P,K organic matter, salinity and PH in the soil, fertilizer and plants, The machine can store and print data, has ... N,P,K organic matter, salinity, and PH in the soil, fertilizer and plantsWith the function of time display, can automatically record ...