Question
Explain methods of conservation of biodiversity.
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| A | B | ||
| $1$ | Kharif crops | $a$ | Food for cattle |
| $2$ | Rabi crops | $b$ | Urea and super phosphate |
| $3$ | Chemical fertilisers | $c$ | Animal excreta, cow dung urine and plant waste |
| $4$ | Organic manure | $d$ | Wheat, gram, pea |
| $e$ | Paddy and maize |