A farmer in a semi-arid area claims that his farming practice is very environment friendly. Which of the following practices on his farm can justify his claim?

1.Planting a tree belt.

2.Practising crop rotation.

3.Carrying out a large scale irrigation system.

4.Using organic fertilizers.

Select the correct answer using the code given below:

General Ability 2015 NDA General Ability 2015 NDA 2015

Options