EFFICIENT SOIL MAPPING USING RTSS FOR LARGE-SCALE FARMING
An efficient soil mapping method using a real-time soil sensor (RTSS) has been developed for large-scale farming. The RTSS travels along the same line as the fertilizer applicator for site-specific crop management in precision farming. The main improvement of the RTSS was made by doubling its customary speed to 0.56 m/s, which allowed the scanning work to reach a speed of 1 ha per hour for a large area of four fields (11 ha). Soil maps of six different soil parameters for eight fields (26.72 ha) were predicted using the soil reflectance spectra collected by the RTSS. Partial least squares regression (PLSR) analysis was applied to the soil reflectance spectra and sensitivity analysis was carried out for calibration. The coefficients of determination (R2) for soil parameters were 0.83 MC (moisture content), 0.69 SOM (soil organic matter), 0.63 pH, 0.54 NN (nitrate nitrogen), 0.80 TN (total nitrogen), and 0.91 TC (total carbon). In this study, the R2 values obtained were the same as the results from a previous study. The grower was able to confirm past events from the soil maps. A major result of this study is that the RTSS method was accepted by the grower as a decision-making support tool.
Real-time soil sensor Precision agriculture Site-specific crop management Soil map Decision making support
Masakazu Kodaira Sakae Shibusawa You Li Ryota Takazawa Yuya Nagami
Faculty of Agriculture,Tokyo University of Agriculture and Technology,3-5-8 Saiwai-cho Fuchu-shi,Tokyo 183-8509,Japan
国际会议
北京
英文
1-5
2009-10-14（万方平台首次上网日期，不代表论文的发表时间）