1. Soil conservation is the process of protecting the soil from erosion to maintain its fertility.
2. The methods that are widely practieed for conserving soil are afforestation, controlled grazing, construction of dams, crop rotation, strip faming contour ploughing, terrace farming, checking shifting cultivation, wind break, etc.

Soils are classified on the basis of their formation colour, physical and chemical properties. Soil is classified into six major types. They are
1. Alluvial soil
2. Black soil
3. Red soil
4. Laterite soil
5. Mountain soil
6. Desert soil

1. The rocks are the solid mineral materials forming a part of the surface of the earth and other similar planets.
2. The earth's crust is composed of rocks.
3. A rock is an aggregate of one or more minerals.
4. Rock is an important natural resource and is found in solid state.
5. It may be hard or soft in nature.
6. They may occur either in the form of elements or compounds.

1. The basic components of soil are mineral, organic matter, water and air.
2. It consists of about 45% mineral, 5% organic matter, 25% of water and 25% of air.
3. It is only a generalized fact.
4. The composition of soil varies from place to place and time time.

1. The igneous rocks are formed by the solidification of molten magma.
2. These rocks are also called as the 'Primary Rocks' or 'Parent Rocks' as all other rocks are formed from these rocks.