2009 Volume 71 Issue 3 Pages 3_70-3_77
To assist the high quality sugarcane production, the practice of individual farm management was investigated using a geographic information system (GIS) with the data of both from the quality-based payment system and the near-infrared spectroscopy (NIR). In 2000/01 and 2001/02, the data such as cropping type, potassium content, and unit yield from all fields in Minami-Daito Island were mapped and analyzed to understand the geographical distribution of the crop. Moreover, annual standardization of data including unit yield, sugar content, and potassium content, which reduces the influence of weather, led to better evaluation of each field characteristics. An increase in potassium content was also observed. The system presented can be utilized in improvement of fertilizer management.
