Which method is considered a physical approach to weed control?

Mowing is considered a physical approach to weed control because it involves the mechanical cutting of weeds to prevent them from growing and competing with the desired crops. By cutting weeds before they can flower and set seed, mowing reduces their population and can help weaken them over time. This method physically removes the above-ground parts of the plants, which can hinder their ability to photosynthesize and reproduce, ultimately controlling their spread.

In contrast, crop rotation, soil amendment, and planting cover crops represent cultural practices that involve managing the agricultural system rather than directly affecting weed plants through physical removal. These methods rely on altering the environment or crop selection to effectively suppress weed growth but do not involve direct physical actions against the weeds themselves.