1. APPLYING NDVI FROM DIFFERENT NUMBER OF SPECTRAL SENSORS IN DELIMITING SOYBEAN FERTILIZATION MANAGEMENT ZONES.
- Author
-
CHEN, H., WANG, X., ZHANG, W., WANG, X. Z., DI, X. D., and QI, L. Q.
- Subjects
NORMALIZED difference vegetation index ,DATA acquisition systems ,DETECTORS - Abstract
The normalized difference vegetation index (NDVI) obtained by GreenSeeker sensors can be used to delimit fertilization management zones and realize variable fertilization. We used six GreenSeeker sensors to build a soybean NDVI data acquisition system, studied the effect of different number of GreenSeeker sensors on the delimitation of fertilization management zones. The NDVI data collected by the different number of GreenSeeker sensors were used to delimit the management zones by the fuzzy c-means algorithm. Silhouette coefficient and adjusted Rand index were used to evaluate the effect. The results show that using different number of GreenSeeker sensors has a particular effect on the delimitation of fertilization management zones. In the case of delimiting fertilization management zones through 10,000 NDVI data collected by three GreenSeeker sensors, silhouette coefficient is 0.563, and adjusted Rand index is 0.76. In the case of 20,000 NDVI data collected by three GreenSeeker sensors, silhouette coefficient is 0.559, and adjusted Rand index is 0.698. It indicates that the effect of using three GreenSeeker sensors on the delimitation of fertilization management zones is not different from that of using six GreenSeeker sensors. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF