Abstract
Land cover changes during the past 50 years and actual status of bio-resources utilization were analyzed to evaluate agricultural sustainability in a small catchment area in Sichuan Province, Southern China. This study revealed that massive deforestation in the 1950's was for fuel wood supply in this area. Afforestaion in the 1970's restored the forest resources quantitatively, which means the forest cover ratio became double the average in Sichuan Province. The analysis of bio-resources utilization suggested that the nitrogen input, mainly consisting of chemical fertilizer, remarkably exceeds the nitrogen output in the study area.
