Question

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

(a) Saccharum munja and Lantana camara

(b) Dichanthium annulatum and Azolla nilotica

(c) Crotalaria juncea and Alhagi comelorum

(d) Calotropis procera and Phyllanthus niruri

Answer 1

Correct Option (c) Crotalaria juncea and Alhagi comelorum

Explanation:

Crotalaria juncea (sunnhemp) and Alhagi camelorum are among the plants which are used as green manures in India. These green manures help the soil through increasement of area, water holding capacities and fertility.