Soil Nitrogen Content Estimation Using SFCW Radar with Interpolated Look-Up Table Inference Technique

The availability of soil nitrogen content is a very important substance for plant growth. Nitrogen plays a role in the formation of chlorophyll and proteins that are essential for photosynthesis and plant development. In this paper, a non-conventional method was used with Stepped Frequency Continuous Wave (SFCW) radar. The SFCW radar is known for detecting the soil surface with high resolution. The value of soil nitrogen content can be estimated using the reflection coefficient obtained from the results of SFCW radar measurements. SFCW radar data can help see the correlation between peak-to-peak values and the nitrogen (N) element obtained from the SEM2252 soil speedometer sensor. When the nitrogen value obtained from the sensor is high, the peak-to-peak value on the SFCW radar also shows relatively high results. The results obtained from the radar are used to find the shape of the curve fitting. This paper uses an inference technique to interpret the soil nitrogen content from the reflected signal obtained from the SFCW radar.