paragraph on soil degradation and conservation in 300 words
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paragraph on soil degradation and conservation in 300 words
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Answer:
Soil degradation is the loss of land’s production capacity in terms of loss of soil fertility, soil biodiversity, and degradation. Soil degradation causes include agricultural, industrial, and commercial pollution; loss of arable land due to urban expansion, overgrazing, and unsustainable agricultural practices; and long-term climatic changes. According to a recent report to the United Nations, almost one-third of the world’s farmable land has disappeared in the last four decades. It was also reported that all of the World’s topsoil could become unproductive within 60 years if current rates of loss continue.
Explanation:
1. Afforestation:
One of the best ways to conserve soil is to increase the area under forests. Undiscriminating trees cutting should be stopped and efforts should be made to plant trees in new areas. 20 to 25 per cent, as they say, is the minimum area of forest land for the whole country which is considered healthy for soil and water conservation. Nevertheless, it was raised to 33 per cent in the second five-year plan; the proportion being 20 per cent for the plains and 60 per cent for hilly and mountainous regions.
2. Checking Overgrazing:
Grazing is very important. But overgrazing of forests and grasslands by animals, especially by herds and flocks of sheep, goats, should be properly checked. One can earmark separate grazing grounds. Alternate fodder crops should be grown in larger quantities.
3. Constructing Dams:
One of the scientific methods to check soil erosion. Soil erosion which happens maximum by river floods can be avoided by constructing dams across the rivers. Water speed can be checked and it considerably saves soil from erosion.
4. Changing Agricultural Practices:
We can save a lot of our valuable soil by bringing about certain changes in our agricultural practices. Roughly the context is described below:
(i) Crop Rotation:
As the name suggests, it is rotating crops. In India, peasants grow a particular crop in the same field year after year. This practice takes away certain elements from the soil, making it infertile and exhausted rendering it unsuitable for that crop.
(ii) Strip Cropping:
Parallel to one another, crops may be cultivated in alternate strips. Some strips may be allowed to lie fallow while in others different crops may be sown e.g., small tree crops, grains, grass legumes, etc. Numerous yields ripen at diverse times of the year and are harvested at intervals. This very method gives surety that at no time of the year the entire area is left bare or exposed.
(iii) Use of Early Maturing Varieties:
Primary budding varieties of crops take really very less time to mature. Thus putting lesser pressure on the soil. In this way it can help in reducing the soil erosion.
(iv) Contour Ploughing:
Technical methods, one can say. Ploughing is done at right angles to the hill slope, following the natural contours of the hill. It makes the ridges and furrows break the flow of water down the hill. As gullies are less, this prevents excessive soil loss. It is likely to develop and reduce run-off so that plants receive more water.
(vi) Terracing and Contour Bunding:
Claims to be one of the oldest methods of soil conservation. Terracing and contour bunding across the hill slopes are very effective. It is done by cutting hill slope into a number of terraces having horizontal top and steep slopes on the back and front.