2. What are the different factors affecting soil formation?
3. How is the red soil formed and why is it called so?
4. Which is the most fertile soil found in India? How is it formed?
5. How is humus useful?
6. Explain the different layers of soil briefly.
7. Explain the various causes of soil degradation.
8. Elucidate the methods of soil conservation.
Answers
Answer:
2.Soils form from the interplay of five main factors namely Parent material, Time, Climate, Relief and Organisms. Parent material: This refers to the mineral material or organic material from which the soil is formed.
3.Red soil is formed by weathering of old crystalline igneous and metamorphic rocks. It is rich in iron and hence appears red in colour. In India, it is found mainly in Deccan plateau.
4.Alluvial soil is the most fertile soil in India. Alluvial soils is are formed by the deposits of the sediments brought by rivers. Most of the rivers originate from the Himalayas and bring along high amount of sediments with them. The soil is made up of particles like silt, sand and clay.
5.Humus is important because it retains moisture in the soil, loosens the soil permitting better aeration and drainage, and encourages the increase of soil organisms which help make nutrients available to plants. It adds body to light soil and loosens heavy, sticky soils.
6.The soil is found in layers, which are arranged during the formation of soil. These layers called horizons, the sequence of layers is the soil profile. The layers of soil can easily be observed by their color and size of particles. The main layers of the soil are topsoil, subsoil and the parent rock.
7.There are several physical factors contributing to soil degradation distinguished by the manners in which they change the natural composition and structure of the soil. Rainfall, surface runoff, floods, wind erosion, tillage, and mass movements result in the loss of fertile top spoil thereby declining soil quality.
8.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. ... Political and economic action is further required to solve the erosion problem.
Answer:
your answer is here...
Explanation:
2. Factors affecting the soil formation is-
(I) moisture (ii) Fertility (iii) water holding capacity
4. Alluvial soil is the most fertile soil found in india.
5. Humus is useful as its maintain the fertility of the soil.
7. cause of the soil degradation is that...
(I) By wind (II) By water (III) By the human factors.