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1:50,000 geochemical survey-based assessment of land quality and land development suggestions for the Yao'an Dam area, Yunnan Province, China

YANG Ming-Long, HUANG Jia-Zhong, ZHU Zhi-Ping, XU Lei, CHENG Yan-Xun, ZHAO Meng-Sheng, ZHANG Long

图4 主要养分元素分布规律

Fig.4 Distribution of main nutrient elements