Intercropping Competition between Apple Trees and Crops in Agroforestry Systems on the Loess Plateau of China

• Lubo Gao,

  Affiliation College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China

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• Huasen Xu,

  Affiliation College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China

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• Huaxing Bi ,

  * E-mail: bhx@bjfu.edu.cn

  Affiliations College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China, Key Laboratory of Soil and Water Conservation, Ministry of Education, Beijing, P.R. China

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• Weimin Xi,

  Affiliation Department of Biological and Health Sciences, Texas A&M University-Kingsville, Kingsville, Texas, United States of America

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• Biao Bao,

  Affiliation College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China

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• Xiaoyan Wang,

  Affiliation College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China

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• Chao Bi,

  Affiliation College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China

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• Yifang Chang

  Affiliation College of Water and Soil Conservation, Beijing Forestry University, Beijing, P.R. China

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