Effect of Long-Term Fertilization on Organic Nitrogen Forms in a Calcareous Alluvial Soil on the North China Plain[J]. P. CHRISTIE.Pedosphere. 2006(02)
Effect of Long-Term Fertilization on Organic Nitrogen Forms in a Calcareous Alluvial Soil on the North China Plain[J]. P. CHRISTIE.Pedosphere. 2006(02)