Affiliation: | 1. Beijing Key Laboratory of Biodiversity and Organic Farming, Key Laboratory of Plant and Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China 2. Gansu Agro-technology Extension Station, Lanzhou, 730020, China 3. Institute of Soils, Fertilizers and Water-Saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, 730070, China 4. Department of Plant and Environmental Sciences, University of Copenhagen, DK-1871, Frederiksberg, Denmark
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