Question

Which of the following is not a method of preventing soil erosion?
A. Terrace farming
B. Contour farming
C. Strip cropping
D. None of the above

Answer 1

Soil erosion reduces the fertility of the soil, which can affect crop yields negatively. It also sends downstream sediment-laden water, which can produce heavy deposits of soil and sediments that prevent the smooth flow of streams and rivers and can eventually lead to flooding. It is more likely to take place again, once soil erosion occurs once.

Complete answer:
Some methods of farming are discussed below:

Terrace Farming - Terracing slows down the water, so it does not hold as much soil when the speed of the water slows down. This slows down erosion and helps to preserve topsoil in place. This helps keep the topsoil in position with the vegetation. The volume and velocity of water flowing through the soil surface are decreased by terraces, which significantly decreases soil erosion.
Contour Farming - A sustainable method of farming where farmers plant crops across or perpendicular against slopes to suit the contours of a slope of a field is called contour cultivation (contour ploughing or contour farming). This plant formation breaks up the water flow and makes it more difficult for soil erosion to occur.
Strip cropping – Strip cropping is a farming method that involves cultivating a field divided into long, narrow strips that are alternated in a pattern of crop rotation. Fields are set with a soil conserving method such as hay in alternating strips with an erodible cropping method such as corn or soybeans. It is used when a slope is too steep or when soil erosion is not stopped by any alternative process.
All three farming methods given above are practiced to prevent soil erosion.

So, the correct answer is option (D).

Note: Erosion of the soil is normally caused by the removal of vegetation or other action that makes the soil dry. Farming, livestock grazing, mining, building, and recreational activities are among some of the causes of soil erosion. Soil erosion's consequences are not just land loss. It has contributed to a dramatic rise in river contamination and sedimentation that obstructs the water sources, resulting in a reduction in the aquatic ecosystem population.