Which BMP is recommended to improve soil structure?

Using radial tires with low pressure is beneficial for improving soil structure because it reduces the compacting effect that heavy machinery can have on soil. When machinery travels across fields, it can compress the soil, leading to reduced porosity and the creation of hardpan layers that inhibit root growth and water infiltration. Radial tires, especially when used at lower pressures, distribute the weight of the machinery more evenly across the soil surface. This allows the soil to maintain its structure, fostering better aeration and moisture retention, ultimately enhancing soil health and crop productivity.

In contrast, the other options would typically lead to negative effects on soil structure. Increasing heavy machinery traffic generally exacerbates soil compaction. Avoiding crop rotation can lead to nutrient depletion and decreased soil health over time. Implementing regular deep tillage can disrupt soil structure and potentially lead to soil degradation if done excessively. Therefore, the choice of using radial tires with low pressure aligns best with the goal of improving soil structure.