MCQ
Crop rotation is carried out for
- AIncreasing acidity of soil
- BDecreasing fertility of soil
- ✓Increasing fertility of soil
- DAll the above
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$I.$ It represents typical agarose gel electrophoresis which showing differential migration of $DNA$ fragments
$II.$ Lane $1$ contains undigested $DNA$ fragments
$III.$ Lanes $2$ to $4$ contains digested $DNA$ fragment
$IV.$ Smallest $DNA$ bands are present at ( $A$ ) position and largest $DNA$ bands are present at ( $B$ ) position