NPK sensors guide the development of agricultural water and fertilizer operation plans

Soil fertilizer is the food for crops and is the material basis for yield increase. The main chemical fertilizers commonly used in agricultural cultivation are nitrogen, phosphorus and potassium. Nitrogen fertilizer is the main component of the nitrogen nutrient fertilizer, including ammonium bicarbonate, urea, nitramine, ammonia, ammonium chloride, ammonium sulfate, etc..

Phosphorus fertilizer is a fertilizer with phosphorus nutrients as the main component, including ordinary calcium superphosphate, calcium-magnesium phosphate fertilizer, etc.

Potassium fertilizer is a fertilizer with potassium nutrients as the main component, which is not much used at present, and the main varieties are potassium chloride, potassium sulfate, potassium nitrate, etc.

To grow good land, we cannot do without monitoring and analysis of soil conditions, especially soil organic matter and fertility. If we can monitor the nitrogen, phosphorus and potassium content of the soil online in real time, we can indeed better understand the relationship between soil fertility and crop growth, and also make it easier to fertilize and improve agricultural production efficiency.

Therefore, many bidding documents for smart agriculture projects now frequently show the demand for soil sensors that can measure soil N, P, and K online.

Soil Nitrogen, Phosphorus and Potassium (NPK) sensors

This type of soil NPK sensor actually measures the electrical conductivity of the soil. The manufacturer multiplies the measured conductivity value by a corresponding factor (based on the conventional soil content of nitrogen, phosphorus and potassium) to arrive at a value for the nitrogen, phosphorus and potassium content.

Due to the different soils and environments on site, such sensors cannot accurately measure the actual nitrogen, phosphorus and potassium content of the soil on site, but give an empirical, theoretical value.

Soil NPK sensor sensor applications.

So is this NPK sensor useless? Of course not! For this npk sensor to be useful, the first is the accuracy of this coefficient, and the second is the normal use of it. If this coefficient can adjust the calibration according to the field environment in a timely manner, then after excluding the relevant interference factors, these data can still guide the development of agricultural water and fertilizer operation plan.

Therefore, if you wish to obtain more accurate soil nitrogen, phosphorus, potassium content, or laboratory method determination, respectively, using Kjeldahl distillation method, UV spectrophotometry, flame photometry, the instruments used are Kjeldahl nitrogen meter, UV spectrophotometer, flame photometer, soil nutrient quick test instrument.

Soil NPK Sensor data sheet 

Soil-NPK-sensor-NiuBoL.pdf

NBL-S-NPK-Soil-NPK-Sensor-Instruction-Manual-4.0.pdf