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प्रश्न
Complete the following table with reference to the soil.
| Action | Effect | Result (w.r.t. fertility) |
| Construction of embankments | ||
| Wind speed decreased | ||
| Farmland is kept fallow for some period | ||
| Humus content increased. | ||
| Trenches are dug across a slope | ||
| Litter is burnt on the farm. | ||
| Proves favorable for micro-organisms | ||
| The salt content in the soil increases | ||
| Chemical fertilizers used excessively |
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उत्तर
| Action | Effect | Result (w.r.t. fertility) |
| Construction of embankments | Reduction in the erosion of soil due to heavy rains. | Increase in Fertility |
| Planting trees | Wind speed decreased | Increase in Fertility |
| Farmland is kept fallow for some period | The fertility of soil gets maintained. | Increase in Fertility |
| Use of organic manures | Humus content increased. | Increase in Fertility |
| Trenches are dug across a slope | Check over the velocity of water running along the slopes and hence reduction in soil erosion | Increase in Fertility |
| Litter is burnt on the farm. | The proportion of ash in the soil gets increased. | Decrease in Fertility |
| Use of organic manures | Proves favorable for micro-organisms | Increase in Fertility |
| Excessive irrigation | The salt content in the soil increases | Decrease in Fertility |
| Chemical fertilizers used excessively | Decrease the number of microorganisms and so the proportion of humus in the soil | Decrease in Fertility |
संबंधित प्रश्न
Name the soil which is good for cultivation of sugarcane.
With reference to Red Soils in India, answer the following questions:
Mention two important crops are grown in this soil.
Why is the Red Soil red in colour?
Alluvial soil and red soil.
Alluvial soils found in the lower courses and the upper courses of rivers.
Alluvial soil of the northern plains and the alluvial soil on the coastal plains of India.
Give a single word for the following:
The loose rock material, together with humus, forming the uppermost layer of the earth’s crust and serving a source of food and moisture for plants.
Which Soil is found suitable to grow coffee in Karnataka?
Which of the following methods does not help in soil conservation?
Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.
| Rock, Clay, Sand, Gravel, Silt |
