This course is study the proper land use, protecting the land against all forms of soil deterioration, rebuilding eroded and depleted soil, conserving moisture for crop use, proper agricultural drainage and irrigation where needed and increasing yield and farm income. The contents are: Principle of soil erosion, erosion process, practices of soil and water conservation, excovering, mulching, green manure, contour farming, rotation, interplanting, terrace and hillside ditch etc.