With reference to Green Manuring, consider the following statements:
1. Green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment.
2. Mostly leguminous plants are used as green manure.
3. Green manures usually perform multiple functions that include soil improvement and soil protection.
Which of the statements given above is/are correct?
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3