swer the following questions:
How is soil important to us? Explain how is soil formed?
What is soil erosion? What are its bad effects for us?
How does man contribute in soil erosion?
What is soil conservation? List the different ways by which s
What is terrace farming? What are its advantages?
What is cover crop? How are shelter belts useful
What are the factors of soil erosion?
n the blanks :
Answers
1)Soils are essential for life, in the sense that they provide the medium for plant growth, habitat for many insects and other organisms, act as a filtration system for surface water, carbon store and maintenance of atmospheric gases. ... Soils provide plants with essential minerals and nutrients.
2)Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.
3)Soil erosion is the displacement of the upper layer of soil, it is one form of soil degradation. ... Soil erosion may be a slow process that continues relatively unnoticed, or it may occur at an alarming rate causing a serious loss of topsoil.
4)The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.
5)Agriculture is the main way humans causesoil erosion. When vegetation is planted in the ground, the topsoil is shifted, which causes erosion. The loose topsoil is then transported by wind to nearby streams and waterways and become sediment or runoff, lowering the overall quality of the water.