Dissertations, Academic 42 Dissertations 40 Soils 27 Agriculture 22 Soil erosion 15 Environmental aspects 9 Rice 8 Analysis 7 Soil chemistry 7 Agricultural biotechnology 4 Decision making 4 Planting 4 Research 4 Agricultural education 3 Agroforestry 3 Carbon content 3 Economic aspects 3 Farmers 3 Fertilizers 3 Malaysia 3 Mathematical models 3 Plant-soil relationships 3 Protected areas 3 Soil conservation 3 Agricultural extension work 2 Agricultural extension workers 2 Agricultural instruments 2 Agricultural productivity 2 Clay soils 2 Clays 2