1. Effects of chemical control of weeds:
- Increased crop yield by reducing weed competition for nutrients, water, and sunlight
- Reduced labor costs by eliminating manual weeding
- Contamination of soil and water sources if herbicides are overused or not used properly
- Development of herbicide-resistant weed species
- Harmful effects on non-target organisms such as beneficial insects and wildlife
2. Effects of bush burning:
- Destruction of natural habitats and loss of biodiversity
- Air pollution from smoke and greenhouse gas emissions
- Soil erosion and loss of soil fertility due to destruction of vegetation cover
3. Effects of mechanical/physical control of weeds:
- Time-consuming and labor-intensive compared to chemical control methods
- Damage to crop plants if not done carefully
- Temporary control of weeds as they may grow back quickly if roots are not completely removed
1. List effects of chemical control of
weeds.
2. Mention three effects of bush
burning.
3. State three (3) effects of
mechanical/ physical control of
weeds.
1 answer