Food Resources
Chapter 15 – Improvement in Food Resources
Question 1:
Explain any one method of crop production which ensures high yield.
Answer:
Crop rotation is one of the methods of crop production that ensures high yield. It is
the method of growing two or more varieties of crops on the same land in sequential
seasons. A crop utilises some particular nutrients in larger quantities from the soil.
Then, if the same crop is grown in subsequent seasons those nutrients will get
depleted in the soil. Therefore, crops having different nutrient requirements are
rotated. For example, legumes which have nitrogen-fixing bacteria in their root
nodules supply the soil with nitrogen. Therefore, these legumes are rotated with
nitrogen requiring cereals such as wheat and maize. This method reduces the need
of fertilizers, thereby increasing the overall yield of crops.
Question 2:
Why are manures and fertilizers used in fields?
Answer:
Manures and fertilizers are used in fields to enrich the soil with the required
nutrients. Manure helps in enriching the soil with organic matter and nutrients. This
improves the fertility and structure of the soil. On the other hand, fertilizers ensure a
healthy growth and development in plants. They are a good source of nitrogen,
phosphorus, and potassium. To get an optimum yield, it is instructed to use a
balanced combination of manures and fertilizers in the soil.
Question 3:
What are the advantages of inter-cropping and crop rotation?
Answer:
Inter-cropping and crop rotation both play an important role in increasing the yield of
crops. Inter-cropping helps in preventing pests and diseases to spread throughout
the field. It also increases soil fertility, whereas crop rotation prevents soil depletion,
increases soil fertility, and reduces soil erosion. Both these methods reduce the need
for fertilizers. It also helps in controlling weeds and controls the growth of
Question 1:
Explain any one method of crop production which ensures high yield.
Answer:
Crop rotation is one of the methods of crop production that ensures high yield. It is
the method of growing two or more varieties of crops on the same land in sequential
seasons. A crop utilises some particular nutrients in larger quantities from the soil.
Then, if the same crop is grown in subsequent seasons those nutrients will get
depleted in the soil. Therefore, crops having different nutrient requirements are
rotated. For example, legumes which have nitrogen-fixing bacteria in their root
nodules supply the soil with nitrogen. Therefore, these legumes are rotated with
nitrogen requiring cereals such as wheat and maize. This method reduces the need
of fertilizers, thereby increasing the overall yield of crops.
Question 2:
Why are manures and fertilizers used in fields?
Answer:
Manures and fertilizers are used in fields to enrich the soil with the required
nutrients. Manure helps in enriching the soil with organic matter and nutrients. This
improves the fertility and structure of the soil. On the other hand, fertilizers ensure a
healthy growth and development in plants. They are a good source of nitrogen,
phosphorus, and potassium. To get an optimum yield, it is instructed to use a
balanced combination of manures and fertilizers in the soil.
Question 3:
What are the advantages of inter-cropping and crop rotation?
Answer:
Inter-cropping and crop rotation both play an important role in increasing the yield of
crops. Inter-cropping helps in preventing pests and diseases to spread throughout
the field. It also increases soil fertility, whereas crop rotation prevents soil depletion,
increases soil fertility, and reduces soil erosion. Both these methods reduce the need
for fertilizers. It also helps in controlling weeds and controls the growth of