Institution: | [1]Research Center of Circular Agriculture, China Agricultural University, Beijing 100193, P.R.China [2]Key Field Scientific Observation Station of Zhengzhou Fluvo-Aquic Soils Ecology Environment, Ministry of Agriculture~Institute of Plant Nutrition, Resources and Environment, Henan Academy of Agricuhural Science, Zhengzhou 450002, P.R.China [3]Soil Science Research Center, University of Calabar, PMB 1115, Nigeria |