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Why is the trampling of litter important in nutrient cycling?

  1. It removes excess weeds

  2. It incorporates nutrients back into the soil

  3. It prevents erosion

  4. It helps regulate temperature

The correct answer is: It incorporates nutrients back into the soil

The trampling of litter is important in nutrient cycling primarily because it incorporates nutrients back into the soil. When animals, such as cattle, trample on plant litter, they break it down into smaller fragments, which accelerates decomposition. This process allows microorganisms in the soil to more effectively decompose the organic matter, releasing essential nutrients such as nitrogen, phosphorus, and potassium back into the soil. These nutrients are critical for plant growth and overall soil health, enhancing the productivity of the ecosystem. While removing excess weeds, preventing erosion, and regulating temperature are all significant aspects of managing land and promoting healthy ecosystems, they do not directly relate to the core function of how trampling specifically contributes to nutrient cycling. The primary benefit of trampling is the physical incorporation of organic materials into the soil—a fundamental step in the nutrient cycling process.