... 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 record and save the time of test sample.3. ... items, sample contents, variety and so on.5.Big-screen LCD shows, and will guide you how to ...