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- [34] Spatial variability of soil nitrogen and phosphorus in small watershed Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery, 2014, 45 (03): : 90 - 96
- [38] RELEASE OF PHOSPHORUS, ALUMINUM AND IRON IN FRACTIONATION OF INORGANIC SOIL-PHOSPHORUS JOURNAL OF AGRICULTURAL SCIENCE IN FINLAND, 1987, 59 (02): : 141 - 145