Summer ploughing
Explanation
Weed control in agriculture encompasses preventive, cultural, mechanical, biological, and chemical methods. Preventive measures are designed to stop weeds from establishing or spreading before the crop is sown, thereby minimizing competition for nutrients, water, and light.
- Excessive use of fertilizers is Incorrect: Excessive use of fertilizers generally promotes the vigorous growth of weeds alongside the crop. Weeds are often more aggressive in nutrient uptake, so excess fertility can exacerbate weed problems rather than control them.
- Summer ploughing is Correct: Summer ploughing (deep ploughing) is a cultural and preventive practice carried out during the hot summer months. By turning the soil deep, underground vegetative structures of weeds (such as rhizomes and bulbs) and weed seeds are exposed to the scorching sun. The intense heat desiccates and kills these propagules, significantly reducing weed emergence in the following crop season.
- Monoculture farming is Incorrect: Monoculture farming involves growing the same crop repeatedly on the same land. This practice tends to select for and increase the population of weeds that are adapted to that specific crop's environment. Crop rotation is the preventive measure used to break weed life cycles.
- Late sowing of crops is Incorrect: Late sowing is generally not a preventive weed control measure. In fact, delayed sowing often allows weeds to germinate and establish themselves before the crop, giving them a competitive advantage. Proper timing or the "stale seedbed" technique (where weeds are induced to germinate and then killed before sowing) is preferred.
Key Takeaway:
Summer ploughing is a critical preventive agricultural practice that utilizes solarization (exposure to sunlight and heat) to destroy weed seeds, hibernating pests, and soil-borne pathogens before the crop is cultivated.