Developing an improved agricultural economy based on ecological relationships in a soil erosion area in the north of China
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The cutting down of forest and the extension of arable fields led to severe degradation of the land in the Mao Jia Shan valley. In restoring the environment and the agricultural productivity, the intricate ecological relations within and between the diverse types of land utilization are taken into account. Strategies are adopted to the ecological sub-systems, such as arable fields, grassland, orchards, sloping woodland, fish ponds, marshes etc.
Within the first 3 years soil erosion was reduced to 1/50th of its previous value and agricultural productivity increased 2.3 fold. Balances of organic matter, N, P and K have been calculated and predicted upto the year 2000. The model, based on the evaluation of fuzzy sets of multiple factors, indicates a further large improvement in productivity and local rural economy.
Key wordsAgroforestry ecological relations economy land restoration watershed management
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