Final answer:
The correct answer is option A. Crop rotation is the process of alternating the crops grown on a particular field to improve soil fertility and structure. This practice benefits the soil by replenishing nutrients, particularly nitrogen when legumes are involved, and helps manage pests and diseases naturally, reducing the need for chemical inputs.
Step-by-step explanation:
The system of rotating crops with legume or brass pasture to improve soil structure and fertility is known as Crop Rotation. Crop rotation involves a planned sequence of different crops grown on the same field over time. This method carries several advantages such as improving soil nutrient levels and breaking crop pest cycles.
For instance, farmers may rotate corn, a cereal crop, with soybeans, a legume, in alternate seasons. Such rotation enhances soil nutrients, particularly nitrogen, due to the nitrogen-fixing ability of legumes, and reduces the reliance on chemical fertilizers. Moreover, it supports biodiversity, reduces production risks through diversification, and lowers pesticide costs by interfering with the life cycles of weeds, insects, and diseases.
While other practices like Agroforestry and Intercropping also contribute to sustainable agriculture, crop rotation specifically focuses on the periodic change of the type of plant grown on a particular land area.