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

  • A
    Crotalaria juncea and Alhagi camelorum
  • B
    Calotropis procera and Phyllanthus niruri
  • C
    Saccharum munja and Lantana camara
  • D
    Dichanthium annulatum and Azolla nilotica

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