Answer the following questions in 50-70 words. 1. With the help of a neatly labelled diagram,
describe a soil profile
2. Classify soils on the basis of their colour
and texture
3. Distinguish between sheet erosion and
gully erosion
G. Answer the following questions 80-100 words.
1. Explain, giving suitable examples, how
human and economic factors determine
the type of land use.
2. Give an account of the various methods
of soil conservation
H. Think and answer.
1. Considering the limited availability of
pasture land in India, how does most of
our livestock population sustain itself?
2. Why is the use of excessive irrigation
water harmful for the soil?
Answers
Explanation:
2. Soils are composed of mixtures of mineral and organic materials, but are classified according to the size of their mineral particles. The three main texture groups are: sandy, Clayey, Silty These all have different texture and colour
3. Sheet Erosion: When water flows as a sheet down a slope and as a result, the top part of the land is washed away, such an erosion is called sheet erosion. Gully Erosion: When the running water cuts through the clayey soils and makes deep channels as gullies, then such an erosion is called gully erosion.
G
1. The land use pattern is determined by certain physical factors of the country such as topography, climate and soil types. ... The economic development of the country depends on the technological development of the country thus leading to the planning of land use pattern.
2. Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, affect both erosion and fertility. When plants die, they decay and become part of the soil. Code 330 defines standard methods recommended by the U.S. Natural Resources Conservation Service.
H
1. Considering the limited availability of pasture land in India, how does most of our livestock population sustain itself ? ... So, livestock has to be fed on decreased area of pasture lands
2. Excess water supply to the crops may result in a condition known as water loging.it reduces air in the soil thereby damaging the roots. if too much of water is in the soil then water will log and there wont be an air for the plant to breathe through roots.
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