Concept:Soil nutrient replenishment is the process of restoring nutrients that crops remove from the soil. It is enhanced by farming practices that add nutrients or improve soil fertility.
Explanation:Crop removal takes nutrients away from the soil, so it does not help replenishment.
Leaching washes nutrients below the root zone, causing nutrient loss.
Erosion removes fertile topsoil, reducing soil nutrient content.
Crop rotation improves soil fertility by alternating crops, especially including legumes that fix atmospheric nitrogen into the soil.
Legumes have root nodules that convert nitrogen into a usable form, enriching the soil naturally.
Including legumes in a crop rotation cycle also reduces soil exhaustion and maintains nutrient balance.
Therefore, among the given options, crop rotation directly enhances nutrient replenishment in the soil.
Answer:D. crop rotation