contour plowing

For example, a technique called contour plowing may be used to prevent soil erosion and conserve rainfall.

By 1938, the introduction of new agricultural techniques such as contour plowing had reduced the loss of soil by 65% despite the continuation of the drought.

By the late 1930s, soil erosion from nearby farms prior to the widespread local use of contour plowing caused the lake bed to fill in, bringing about the end of Lake Como.