Green manure plants used by farmers mainly belong to___________
A
Compositae
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B
Leguminosae
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C
Solanaceae
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D
Poaceae
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Solution
The correct option is B Leguminosae
Green manure crops, mostly Leguminosae, produce 20–50 tonnes of fresh matter depending on the type of crop and the growing season.
Leguminous green manures contain nitrogen-fixing symbiotic bacteria in root nodules that fix atmospheric nitrogen in a form that plants can use.
This performs the vital function of fertilization. Green manure acts mainly as soil acidifying matter to decrease the alkalinity / pH of alkali soils by generating humic acid and acetic acid.