Q1. Briefly describe three natural methods of replenishing the nutrients of the soil.
Q2. If soil has all the nutrients, why do we need to replenish it?
Q3. Crop rotation has helped the farmers to increase the crop yield . Comment on
this statement.
Q4. A farmer leaves his field uncultivated for a few months. State the significance of
this practice .
Q5. Compare and contrast:
a) Manure and fertilizers b) Crop Rotation and Field Fallow
Answers
Answer:
Q1. Briefly describe three natural methods of replenishing the nutrients of the soil.
ans:Field fallow, crop rotation and mixed cropping are three natural methods of replenishing the nutrients of the soil. These natural methods are not enough and farmers have to resort to manures and fertilisers.
Q2. If soil has all the nutrients, why do we need to replenish it?
ans: It is necessary to replenish the nutrients into the soil because all the nutrients that soil has are used up by the plants during their growth so for the continuos supply of nutrients to the plants it is necessary to replenish the soil again and again.
Q3. Crop rotation has helped the farmers to increase the crop yield . Comment on
this statement.
ans:Crop rotation contributes to increased yields through improved soil nutrition. By requiring planting and harvesting of different crops at different times, more land can be farmed with the same amount of machinery and labour.
Q4. A farmer leaves his field uncultivated for a few months. State the significance of
this practice .
ans:This is because the same type of crop planted repeatedly in the same area keeps draining the land of the same nutrients needed for that plant's growth. ... In the past, not planting anything (also called leaving the field fallow) allowed the land to rest and replenish its nutrients.
Q5. Compare and contrast:
a) Manure and fertilizers b) Crop Rotation and FielFallow
ans:Manures and fertilizers are soil additives that improve the soil quality, helping plants to grow. The main difference between the two is that manure is all-natural animal droppings while fertilizer may be natural but may also have chemicals and other unknown substances added to it
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Answer:
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Explanation:
1.Field fallow, crop rotation and mixed cropping are three natural methods of replenishing the nutrients of the soil. These natural methods are not enough and farmers have to resort to manures and fertility...
2.It is necessary to replenish the nutrients into the soil because all the nutrients that soil has are used up by the plants during their growth so for the continuos supply of nutrients to the plants it is necessary to replenish the soil again and again...
3.Crop rotation is the practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons. It helps in reducing soil erosion and increases soil fertility and crop yield. With crop rotation, particular nutrients are replenished depending on the crops that are planted...
4.The term ‘fallowing’ is used when farmers leave their field uncultivated. Continuous cultivation of crops often leads to the depletion of fertility of the field. Under such circumstances lands are left uncultivated for restoration of fertility....
5.a)Manure is not as much rich as fertilizers in terms of plant nutrients, as fertilizers are rich in plant nutrients. As manure is insoluble in water, it is slowly absorbed by the soil. On the other hand, fertilizers get easily dissolved in water, and that is why it is used by the plants immediately....
b)Field Fallow-To increase the fertility of the land, the land is left uncultivated for two or more seasons. Crop rotation-Its a method of cultivation in which different types of crops are grown one after the other.....
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