Which of the following plants are used as green manure in crop fields and in sandy soils
Dicanthium annulatum and Azolla pinnata
Crotalaria junecea and Alhagi camelorum
Calotropis procera and Pitylanthus niruri
Saccharum munja and Lantana camara
Gossypium hirsutumis
The term ‘bio-magnification’ refers to the
Pyrethrin is extracted from
Sporeine kills insects by inhibiting ion transport in the
Neem tree has acquired industrial importance as a source of