... plants. 2.Test 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, fertilizer and plants, and also can store datum, remote send ... , K, humic acid , organic matter, salinity, and PH in the soil, fertilizerand plant2.With the function of time display, can automatically ...