Final answer:
The statement that minimum tillage often uses greater amounts of herbicides is true. Minimum tillage reduces soil disturbance and can lead to more weeds that might require increased herbicide use.
Step-by-step explanation:
Minimum tillage conservation often entails using greater amounts of herbicides to control weeds, which is a statement that can be considered true. In conventional agriculture, tilling is done extensively, which can disrupt the growth of weeds, but also disturbs the soil ecosystem and contributes to erosion and soil compaction. In contrast, minimum tillage practices support sustainability by reducing soil disturbance and preserving soil structure.
However, as tilling serves to mechanically manage weeds, less disturbance often means more weeds, which may lead to an increased reliance on chemical weed control methods, including herbicides, to maintain the crop fields. In sustainable agriculture, other practices like crop rotation, intercropping, and the use of organic herbicides may also contribute to weed management, potentially reducing the need for synthetic herbicides.