12. Consider the following agricultural practices :
1. Contour bunding

2. Relay cropping
3. Zero tillage

In the context of global climate change, which of the above helps/help in carbon sequestration/storage in the soil?

1. 1 and 2 only

2. 3 only

3. 1, 2 and 3

4. None of them

Correct Answer :

1, 2 and 3