Veinasa-NPK Agricultural Nutrient Probe Digital Arduino Soil Test RS485 NPK Sensor AnalyzerQ:What's the delivery time? A: Usually, we dispatch goods in 3-5 working days after receiving your payment. But it depends on your quantity. Veinasa-NPK Agri...
Sensor calibration was performed exclusively on the M1 soil type, as illustrated inTable 3. The calibration procedure consisted of two steps: Table 3.Calibration values—I. Initial calibration: Calibration was conducted using a solution of 200 mL distilled water with 2 g of NPK fertilizer. ...