Soil degradation Pollution and Degradation 4 Soil Chemistry and Mineralogy 4 Soil Fertility 4 Soil fertility 4 Agriculture 2 Biodiversity 2 Erosion 2 Erosion: Soil and Water Conservation 2 Field Crops, (New March 2000) 2 Industrial Wastes and Effluents 2 Nitrogen 2 Phosphorus 2 Plant Nutrition 2 Plant Production 2 Plant nutrition 2 Pollution 2 Saccharum 2 Saccharum officinarum 2 Soil Surveys and Land Evaluation 2 Soil organic matter 2 Soil types 2 Sugarcane 2 Sustainability 2 Agricultural development 1 Agricultural soils 1 Air pollution 1 Animal Ecology 1 Beet molasses 1 Beet pulp 1