1. The effect of organic matter additions on soil respiration, soil nitrogen and microbial activity;Abd-El-Malek;Ann. Inst. Pasteur,1968
2. Investigations on nitrogen mineralization in soil after application of town refuse of different degrees of decomposition;Ahrens;Sonderh. Landw. Forsch.,1969
3. Soil aggregation. Some facts and fallacies;Allison;Soil Sci.,1968
4. Soil organic matter and its role in crop production;Allison,1973
5. Einfluss von Müllkompost-Torf-Mischungen auf das Wachtum von Tomaten und Salatjungpflanzen;Alt;Landwirt. Forsch.,1977