Question

what is meant by contour trenching​

Answer 1

Answer:

Contour trenching is an agricultural technique that can be easily applied in arid sub-Sahara areas to allow for water, and soil conservation, and to increase agricultural production. Between two trenches crops can benefit during the growing season from the subsoil water reserve gathered during the rainy season.

Answer 2

Answer:

Planting trees can also control the velocity of the wind is helps reducing the erosion of soil by wind the plants roots hold the soil and his also reduce the erosion of soil under soil conversation the continuous control trenches are constructed along the slopes