Soil temperature Soil water 2 Alleviation of soil physical constraints for crop production 1 Atmosphere 1 Atmospheric pressure 1 Atmospheric temperature 1 Concept of soil 1 Deforestation 1 Evapotranspiration 1 Humidity 1 Rainfall 1 Rocks and minerals in earth's crust 1 Role of physical properties in soil fertility 1 SMC and SOC 1 Soil acidity 1 Soil classification 1 Soil colloids 1 Soil components and its relationship 1 Soil survey and mapping 1 Solar radiation 1 Weathering and soil formation 1