共 36 条
- [21] POLYCARBOXYLIC ACIDS EXTRACTED BY WATER AND BY ALKALI FROM AGRICULTURAL TOP SOILS OF DIFFERENT DRAINAGE STATUS JOURNAL OF SOIL SCIENCE, 1978, 29 (03): : 373 - 377
- [26] PHOSPHORUS STATUS OF SOME ETHIOPIAN SOILS .2. FORMS AND DISTRIBUTION OF INORGANIC PHOSPHATES AND THEIR RELATION TO AVAILABLE PHOSPHORUS TROPICAL AGRICULTURE, 1991, 68 (01): : 2 - 8
- [28] SOME PHYSICOCHEMICAL PROPERTIES AND THE FERTILITY STATUS OF SOILS UNDER 3 DIFFERENT CULTIVATION SYSTEMS AROUND NSUKKA, NIGERIA INTERNATIONAL JOURNAL OF TROPICAL AGRICULTURE, 1986, 4 (04): : 323 - 334