共 50 条
- [35] EXTRACTABILITY OF COBALT, COPPER, MANGANESE AND ZINC WITH 3 DIFFERENT CHEMICAL METHODS OF SOILS OF DIFFERENT ORIGIN ACTA AGRICULTURAE SCANDINAVICA, 1984, 34 (03): : 339 - 344
- [38] METHODS OF MEASURING AVAILABLE ZINC IN ZIMBABWEAN SOILS ZIMBABWE JOURNAL OF AGRICULTURAL RESEARCH, 1981, 19 (01): : 83 - 90