Soil nitrogen content is very important in plant growth. The right use of nitrogen fertilizer is important to maximize crop yields and achieve the desired quality. In general, farmers apply fertilizer rates based on soil testing before the planting process. There are two methods for measuring the availability of nitrogen in the soil such as conventional and non-conventional methods. The conventional method is a measurement carried out by taking soil samples and laboratory testing. This method requires a lot of time and costs. The non conventional method is divided into two including contact sensors and non contact sensors. Contact sensors are carried out with sensors that are plugged directly into the soil. This requires a long time and a lot of human resources. Non-contact sensors using SFCW radar can be an opportunity to measure nitrogen elements easily. Stepped Frequency Continuous Wave (SFCW) is a type of radar that uses continuous electromagnetic waves with frequencies that change in steps. SFCW radars c