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Soil erosion is a process in which the topsoil of a field wears away as a result of natural physical forces of wind, water and other forces that result from activities such as farm tillage. Soil erosion deteriorates soil fertility which results in decreased crop yield. Water conservation is the application agronomical practices such as contour cultivation, crop rotation, and mulch farming to check soil erosion which in turn aids in conserving water in the soil. This paper is going to provide an in-depth description of aspects of soil erosion as well as techniques to conserve water and soil for better soil fertility and crop yield.
Soil conservation of the practice that encompasses using the land in the appropriate manner and conducting management practices that foster the use of soil sustainably and productively to ensure land degradation and soil erosion is minimized. Soil erosion is an outcome of combined forces of water and wind on an already vulnerable soil. (1) The section of land that has experience soil erosion is usually characterized by reduced depth of soil.
This results in reduced moisture storage of the soil as well as reduction of the depth of crops' feeding zone. Different types of agronomy practices exist to ensure that raindrops are intercepted as well as reducing the effects of splash thus enhancing better rate of water intake by soil which results in better soil structure and improved organic matter content of the soil. (4)
There three categories of soil erosion that depends on the agents of soil erosion which include water erosion, geological or chemical erosion, and wind erosion.
Water and the wind result in soil erosion that is usually very prevalent and is regarded as tangible. Chemical or geological erosion is normally a slow process that can take place continuously for many years and is often regarded non-tangible. There is a further subdivision of water erosion which is according to the effects of water erosion. (3)
It referred to as natural erosion that takes place under vegetation cover and includes soil and the eroding processes of the soil that balance that favors and suits the growth of most crops and plants. The slow rate of soil erosion allows for the new soil to be formed and cover the eroded section through weathering processes. The resulting features of this kind of erosion are streams and valleys. (3)
Sheet Erosion:
This occurs when the rate at which snow melts or rain falls is quite fast that the soil cannot absorb the water, accumulated sheet of water on the surface moves downhill. Thus, combined efforts of moving water and heavy raindrops on the newly plowed land as wells sloppy continuously washes away the soil on the surface of the land hence resulting in sheet erosion. (2)
Gully Erosion:
Small rills combines with other rills along the slope thus resulting in large channels. The large channels that forms out of the small rills allows large volume of water to collect on these channels which increases their force thus ripping away large pieces of soil. The water starts cutting into the slope when it encounters a sudden drop thus resulting in gully erosion in terms of large channels. Filling the formed gullies requires very specialized cultivation since the formed gullies are quite deep for the machines to cross them. Normally, the presence of destructive gullies signifies rill and sheet erosion that has been persistent for a long duration. (2)
Wind erosion is the process that involves removal of soil by the wind and transporting it to a different location where it is deposited in that location. The blowing wind begins with small amount of soil and plant, as they move on the surface, they pick up other materials which scorches the soil from the ground thus resulting in further erosion. This covers dead as well as growing vegetation with mounds of sand and drifts. When the plants are harvested, the soil they protect is exposed wind erosion. When the wind blows for a long period of time, the soil carried will spread to the whole community. (2)
Effects of Soil Erosion:
Soil erosion adversely affects the livelihood of people in many ways. Below are the major outcomes that result from soil erosion from different agents.
In Biological Measures: There are different agronomical practices such as contour cultivation, crop rotation, and mulch farming are the crucial mechanisms for conserving the fundamental resources of water and soil as well as checking soil erosion.
It is evident that soil erosion causes a lot of damages to the soil which results in decreased crops yield. Soil erosion results in reduced capacity for soil to store water and nutrients as a result of wind erosion which results in a dry environment and reduced soil fertility. Also, soil erosion results in flooding which causes death of people and animals as well as destruction of prperty. There are different types of soil erosion that is water erosion, geological or chemical erosion, and wind erosion. Water can be conserved through different agronomical
Soil Erosion and Conservation Techniques for Improved Crop Yield. (2022, Feb 04). Retrieved from https://studymoose.com/a-description-of-the-aspects-of-soil-erosion-as-well-as-techniques-to-conserve-water-and-soil-for-better-soil-fertility-and-crop-yield-essay
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