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Comparison of Water and Soil Conservation among Different Vegetations in Mountain Areas of Northeast Yunnan Province,China Nutrient Cycling in Bamboo Stands Ⅱ. Nutrient Input with Throughfall and Its Loss Through the Run-Off of the Watershed in Pure Phyllostachys pubescens Stands Studies on the comprehensive development of hilly land in Fujian—I．Effects of different planting manners on the or chard ecosystem