Department of agriculture, Govt. of Punjab issues a fortnightly Urdu digest named "Zarat Nama". This is very helpful in preparation
Then visit regularly
www.agripunjab.gov.pk
www.npfs-minfa.gov.pk
Also you may also arrange Production Plans, Technology, and other material from Information Cell of Agriculture Department
I have observed that Agriculture paper is more focused about general trends, current challenges etc instead of specified technical knowledge
most important issues of agriculture today are:
1. Food Insecurity
2. Shortage of Water
3. Drip Irrigation
4. Off Seasonal Vegetables (Tunnel farming)
5. Floriculture and its future
6. Crises of Fertilizer
Price instability of different commodities