Abstract
Cropping type is one of the distinct feature of sugar cane cultivation, and it influences the working method, yield, sugar content, and so on in remarkable ways. Harvesting determines the cropping types, and the timing and the method also affect the yield and sugar content in both the present and the subsequent season. The relationships between cropping type and yield and sugar content, and the effect of the harvesting or planting time on the yield, sugar content were clarified in this study to choose the most desirable harvesting method. Mathematical models for the yield and sugar content were made by taking the characteristics of cropping types into consideration.