1-Black Soils are largely found in Maharasthra.
2-The soil which is soft when wet and very hard when dry is Laterite.
3-Regur soils are called Black soils.
4-The older alluvium is called as Bhangar in India.
5-The newer Alluvium is called as Kadar in India.
6-Laterite soils are characterised by leaching away of the much of silica from the original rock.
7-The sand dunes are caused due to wind erosion.
8-Red soils are derived from the weathering of crystalline and metaphoric rocks.
9-The erosion which is more prevalent on the banks of Yamuna and Chambal is called as Gully erosion.
10-Red soil is rich in iron.
11-Cotton is the most suitable crop of Black soils.
12-Black soil is also called as Deccan trap soil.
13-The soils which occur mostly in Western Ghats and and Chota Nagpur plateau are Laterite soils.
14-Soils deficient in calcium and sodium are called saline and alkaline soils.
15-Desert soils have very low humous content.
16-Laterite soils are very poor in fertility and generally support pastures and scrub forests.
17-Finger shaped grooves cause Rill erosion type of erosion.
18-If the erosion continues further,the rills may deeper and and enlarge into gullies.
19-The shifting cultivation called Jhumming, was extensively practised by the tribal population.
20-Black cotton or regur soils are mostly found in Deccan lavas tract.
21-Black cotton or Regur soils are ideal for dry farming due to their moisture retentive capacity.
22-Desert soils are suitable for high salt tolerant crops such as Barley and cotton.
23-Gully type of soil erosion is most prevalent over Chambal region.
24-The Alluvial soils are developed due to deposition of sediments.
25-Contour bunding helps for soil conservation.
26-Black cotton or Regur soils are mostly clayey and moisture retentive.
27-Due to deficiency of Nitrogen and humous,the Alluvial soils require heavy fertilisation.
28-What are the three layers of soil ?
Ans- Topsoil, subsoil, bedrock
29-Three types of soil are clay, sand, and ?
Ans-Loam.
30-Materials that are rich in the things plants need to grow are called fertilisers.