NEET 2003 Biology question

Which of the following plants are used as green manure in crop fields and in sandy soils : -

(1)Crotalaria juncea and Alhagi camelorumCorrect
(2)Calotropis procera and Phyllanthus niruri
(3)Saccharum munja and Lantana camara
(4)Dichanthium annulatum and Azolla nilotica

Answer: (1)

Solution

Green manure crops are fast-growing, mostly leguminous plants that are ploughed back into the soil to add organic matter and nitrogen. Crotalaria juncea (sunn hemp) and Alhagi camelorum (camel thorn) are legumes used in this way, including on sandy soils - option (1).

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Question ID VK-089312