Fill in the blanks
i)________and __________improve the quality of soil.
ii)__________converts freee atmospheric nitrogen into nitrates.
iii)Modern methods of irrigation are ______ and ______
iv)A ______________is used for both harvesting and threshing.
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can you give some hints if given
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Answer:
the answer of ¡¡¡ is by water sprinklers and tubes
4 answer is combine harvester
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