Explain the various methods of weeding.
Farmers use many ways to remove weeds and control their growth.
Tilling before sowing of crops helps in uprooting and killing weeds, which may then dry up and get mixed with the soil. The best time for the removal of weeds is before they produce flowers and seeds.
The following tools may be installed
i. Khurpi - The Khurpi is used to remove of weeds by uprooting or cutting them from time to time.
ii. Seed Drill - A seed drill is also used to uproot weeds.
iii. Weedicides - Weeds are also controlled by using weedicides.
Describe the role of fertilisers in improving crop yield. Mention one adverse effect of excessive use of fertilizers.
Why do the Governments in some countries impose restrictions on the import of plants? What are the advantages of having these restrictions removed?
Is having loose soil good for plants? What will happen if the soil is too loose?
Describe the role of irrigation in improving crop yield. Mention any one effect of it if it is used in excess.
