共 9 条
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- [2] Beckett P. H. T., 1971, Soils and Fertilizers, V34, P1
- [3] DANCETTE C, 1969, Afr. Soils, V14, P143
- [5] HEDLEY DD, 1972, ESTIMATION PLOT SIZE
- [6] MOORMANN F, 1975, 3 INT I TROP AGR TEC
- [7] Moormann F. R., 1972, Soils of the Humid Tropics., P45
- [8] NYE PH, 1965, 51 COMM AGR BUR TECH
- [9] Smyth AJ, 1962, SOILS LAND USE CENTR