Aiming at rich farming village based on aqueous and soil resource. Improvement in production base and development of management technology for realizing productivity improvement and multiple functions. Seasonal variation of water quality and algae in agricultural water regulating pondage.
1. Elucidation of natural circulation functions of topographic linkage systems and development of improvement technologies. (2) Elucidations of behaviors of substances affecting environment in crop - farm land - water systems and environmental capacity of the systems. Elucidation of behaviors of substances affecting environment in the ecological system of tea fields.