NOTE: YG-LY607 is Nitrogen tester YG-LY608 is Phosphorus tester YG-LY609 is Potassium tester Use steps: 1. Press the on key to start the machine; 2(1). Precision test method: First, put the soil (it ...View More
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High Precision NPK Soil Tester Meter Nitrogen Phosphorus Potassium Soil Detector For Greenhouse Garde Farm