17. Which crop is generally grown between two cereal crops in crop rotation to restore the fertility of soil ?
18. State one advantage of growing a leguminous crop between two cereal crops.
19. Name the nitrogen-fixing bacteria present in root nodules of leguminous plants.
20. Which agricultural practice comes first: harvesting or weeding?
21. Which is the first step in the cultivation of a crop ?
22. For what purpose is a hoe used?
Answers
Explanation:
ANSWER
A leguminous crop fixes atmospheric nitrogen with the help of nitrogen fixing bacteria. It helps in the addition of nitrogen into the soil without adding extra nitrogenous fertilizer to the soil. This practice helps a farmer to save the money wasted for fertilizer as well as helps to raise a pollution free crop and increase the yield.
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Answer:
17. Which crop is generally grown between two kinds of cereal crops in crop rotation to restore the fertility of soil?
Answer:Leguminous crops like pulses and beans are generally grown between two kinds of cereal crops in crop rotation to restore the fertility of the soil.
18. State one advantage of growing a leguminous crop between two kinds of cereal crops.
Answer:Growing a leguminous crop between two kinds of cereal crops restores the fertility of the soil.
19. Name the nitrogen-fixing bacteria present in root nodules of leguminous plants.
Answer:The nitrogen-fixing bacteria present in root nodules of leguminous plants is rhizobium bacteria.
20. Which agricultural practice comes first: harvesting or weeding?
Answer:Weeding is the first agricultural practice.
21. Which is the first step in the cultivation of a crop?
Answer:The first step in the cultivation of a crop preparation of soil.
22. For what purpose is a hoe used?
Answer:Hoe is used for removing the seeds and loosening the soil