Which farming technique involves tilling land along the contours of slopes?

Contour farming is a sustainable agricultural practice that specifically focuses on tilling land along the natural contours of slopes. This technique helps to reduce soil erosion and improve water retention, as it utilizes the shape of the land to slow down water runoff. By planting crops in rows that follow the contours, farmers can maximize the benefits of rainfall, minimize soil displacement, and enhance the overall health of the soil. This method is particularly effective in hilly or sloped terrains where conventional farming might lead to increased erosion. The other techniques listed, while valid in their own contexts, do not involve the contour-based approach that is central to contour farming.