ZD Instrument just introduced new field use testers, to measure soil available N, P, K. Such innovation greatly reduced cost of N,P,K test, greatly increased test effeciency. By now, ZD Instrument has series of soil testers to cover all the main parameters including N, P, K, pH, EC, Temp, Humidity. With our R&D ability, ZD Instrument will keep on supplying customers all over the world with its up-to-date sensors, testers for argriculture.

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