共 50 条
- [31] Nitrogen, phosphorus and potassium availability in soils treated with vermicompost Informacion Tecnologica, 10 (02): : 179 - 182
- [35] Phosphorus availability indices in relation to phosphorus fractions in some acid soils of Jharkhand INTERNATIONAL JOURNAL OF AGRICULTURAL AND STATISTICAL SCIENCES, 2007, 3 (02): : 561 - 569