Question

An essay on soil concervation

Answer 1

Quantitative determination of the extent and impact of soil erosion by water in the tropics have been sketchy. However all available evidence indicates that accelerated erosion is a problem of serious magnitude and with a multitude of negative effects in many tropical countries. The awareness to conserve soil began approximately nine thousand years ago when human civilization shifted from “nomadic hunting and gathering experience” to a more permanent, settled and intensive ” soil-dependent plant and animal” farming systems (Miller, Rasmussen and Meyer, 1985). Soil provides the medium from which most of the sustenance for humankind is derived. This thin, complex, crustal carpet uniquely integrates many attributes of the lithosphere, atomosphere, hydrosphere and biosphere (Miller, Rasmussen and Meyer 1985).

Soil is regarded as a nonrenewable source since its formation from the parent rock material to an agriculturally productive growth medium is a very slow process (Lal 1990). The top soil is where most of the living activities of both flora and fauna take place. According to Brady and Weil 1999, the top soil is the upper most part of the soil ordinarily moved in tillage or its equivalent in uncultivated soils which range in depth from 7 to 25 cm (the plow layer). Removal of this plant nutrient enriched topsoil due to soil erosion would result in lowering of soil fertility through losses of both organic matter and nutrients which would result in decline of crop yields (Lal 1986; Rose and Dalal 1988). This loss in soil productivity due to erosion is serious in caribbean countries where fertilizer substitute for the lost plant nutrients is not affordable. This would lead to poorer soil profile characteristics such as low organic matter levels (Rose 1989;Rose 1998).

Soil Erosion is perhaps the most serious form of land degradation throughout the world. For the tropics specifically, while it is acknowledged that erosion is more serious than else where, no analytical or systematic studies have been undertaken to document the problem, it consequences or potential solutions. Soil erosion results in lost water and plant nutrients at rates even greater than those occurring naturally through leaching ( Brady and Weil 1999). If there are no conservation practices present, soil erosion will occur and land degradation, reduced productivity due to loos of top soil, increased runoff and off site sedimentation problems (such as siltation of bodies of water and damage to crops and roads) will occur. The consequent socio-economic costs of sometimes more obvious off site damage are commonly easier to identify and quantify (Chrisholm 1987; Rose 1993).

Answer 2

hello......

Conservation of soil is very important for us. It is the presious gift from nature.
Soil erosion is a serious problem affecting land all over the world . In certain areas the soil erosion has become a menace which cause decline in the crop yield. Tgis is happening due to wrong human practices like cutting of trees , overgrazing by animals,besides many other reasons.
Soil takes 1000 of years to ne made and it took only 10min to to pollute.
Soil pollution is caused by the factors like use of chemical , toxic compound, oil and fuel dumping etc.....
Soil is very useful for us, which living things get food directly or indirectly.
So , we should check soil erosion ---
1. Encouagement of afforestation and discouragement of deforestation .
2. To check overgrazing and judices use of pasture land.
3. Crop rotation and multiple croping method.
4.Avoiding overgrazing .

So, we should conserve soil.

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