1K. S. Kumarasinghe,F. Zapata,G. Kovacs,D. L. Eskew,S. K. A. Danso. Evaluation of the availability ofAzolla-N and urea-N to rice using15N[J] 1986,Plant and Soil(1-3):293~299
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1赫崇岩,赵玉珍,王庆,李忠彦,隗晓岚,高金方.N的丰度问题[J]土壤通报,1984(01).
2K. S. Kumarasinghe,F. Zapata,G. Kovacs,D. L. Eskew,S. K. A. Danso. Evaluation of the availability ofAzolla-N and urea-N to rice using15N[J] 1986,Plant and Soil(1-3):293~299