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26/10/2021 11:06 am
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Which of the following plants are used as green manure in crop fields and in sandy soils?
(1) Calotropis procera and Phyllanthus niruri
(2) Dichanthium annulatum and Azolla nilotica
(3) Saccharum munja and Lantana camara
(4) Crotalaria juncea and Alhagi camelorum
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26/10/2021 11:07 am
Correct answer: (4) Crotalaria juncea and Alhagi camelorum