... PH and salinity in soil 3.with printer Introduction:The soil nutrient tester can quickly test the ... N, P, K, humic acid , organic matter,salinity, and PH in the soil ... organic matter, salinity, and PH in the soil, fertilizerand plant2.With the function of time display ... ±4nm; green light 520±4nm6) Shake resistance: qualified(Attention: above indicators all exceed ...