1. The significance of organic materials to Egyptian agriculture and maintenance of soil productivity;ABDEL-GHAFFAR,1982
2. Use of organic amendments and some microbiological aspects of Egyptian desert soils;ABDEL-GHAFFAR,1983
3. Effect of different organic materials on certain properties of the calcareous, sandy and alluvial soils of Egypt and on crop yield;ABD EL-NAIM,1982
4. A preliminary study on the effect of using sewage water in sandy soils;ABD EL-NAIM;Ain Shams University, Faculty of Agricultural Research Bulletin,1982
5. Effect of irrigating loamy sandy soil by liquid sewage sludge on its content of some micronutrients;ABDOU;Plant and Soil,1980