A-I just saw a question regarding irrigation system in 2011 paper see the link below
1. Revamping irrigation system (The author of this article Bilal Hussan is an agrarian and CSP)

2.Saving irrigation water

B-other short questions on tunnel farming

1.Tunnel farming: A profitable business
2.Off season vegetable production

C.regarding forestery question
1.Depletion of Forest Resources

I hope to share more for 2011 paper and try to recall my knowledge for objective type paper...