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Land degradation is a composite term, which mainly refers to the worse write an essay on soil degradation in land resources including soil, water, vegetation, rocks, air, climate, relief etc. The occurrence of landslide is also considered as a kind of land degradation phenomena. The land write an essay on soil degradation signifies, the temporary or permanent declination in the productive potential of the land. The productivity of grassland and forest resources in addition to the cropland is also taken into consideration for evaluation of land write an essay on soil degradation. As for as its extent is concerned, it depends on various agents causing degradation. Essay 2. Definition of Land Degradation : As per definition of land degradation is concerned, there have been introduced numerous terms coursework based degrees definitions.

However, the common terms amongst them are the soil write an essay on soil degradation, land degradation and desertification. The term desertification refers to the land degradation in arid, semi-arid and sub-humid areas due to anthropic activities. On this write an essay on soil degradation of desertification the researchers have opinioned that it is very narrow, because severe land degradation resulting from anthropic activities can also occur in temperate humid regions and in humid tropics.

The biological potential depends on several interacting factors; which is difficult to define them. Soil degradation by accelerated water and wind-induced erosion is a serious problem, and found from several decades, especially in developing countries tropics and essay handouts. Accelerated soil erosion has adverse economic and environmental impacts. As per regional food production statistics write an essay on soil degradation with and without soil erosion of the world, there is total loss in food production of about 31 M Mg in Africa; M Mg in Asia and 18 M Mg in tropical America.

Essay 3. Global Land Degradation write an essay on soil degradation Fig. Amongst various sources of land degradation the highest share is of desertification which is about 2. Similarly, the degree of variations slight, moderate, severe and extreme in soil degradation is also shown in Table Essay 4. Causes of Soil Degradation : It is mainly write an essay on soil degradation of following causes:.

Under this reason the land degradation is caused due to continuous and long-term removal of soil mass and nutrients from the land by the action of water. Under water erosion the processes may be the sheet erosion in which a more or less uniform removal of thin layer of topsoil justice paper happen during storm event; rill erosion in which small write an essay on soil degradation are formed in the field when sheet erosion is not checked; and the gully erosion which accompanies the formation of bigger channels similar to incised rivers in the area.

The write an essay on soil degradation erosion gully formation ultimately causes soil degradation. Best write my essay website heist resume type of soil erosion accomplishes the removal of soil particles by wind action. Usually this is the kind of sheet erosion, in which soil is removed in thin layers, mainly. This source of land degradation is very prominent in the area having very fine to medium size sand particles; normally in deserts areas.

In India this type of occurrence is very common in Rajasthan. The soil erosion write an essay on soil degradation to reduce the soil productivity in following way:. Reduction in soil organic matter, resulting into declination in soil biological activities. Development of bad effects on physical properties of the soil structure, aeration, water-holding capacity etc. Development of nutrients deficiencies or increase in toxic levels in the soil. Creation of toxic substances due to incorrect application of fertilizers in the field. The declination in soil fertility causes soil degradation because of development of bad effects on physical, biological and chemical properties of the soil.

This type of soil degradation is caused due to rise in groundwater table close to the soil surface, write an essay on soil degradation of inadequate drainage system in the write an essay on soil degradation or write an essay on soil degradation irrigation management practices. In water logging situation the soil gets completely saturate with water, as result there is development of oxygen deficiency for plant growth. Development of this problem could be due to salinization. The salinization increases the salt level in the soil water solution or sodification, i.

The soil salinization often takes place in conjunction with poor irrigation management. The soil sodification tends to occur naturally. The areas prone to high water table fluctuation have the problem of write an essay on soil degradation sodification. The problem of sedimentation takes place through water flooding or wind blowing. Under sedimentation the fertile soil gets covered by less fertile sediments; and leading to make the soil unfit for cultivation. This problem mainly arises when withdrawal of ground water exceeds the amount of water recharged in the aquifer.

An area with write an essay on soil degradation deep water buy english books online is also considered unfit for cultivation. The area essay checker grammar prolonge deep water table is treated as degraded soil. The vegetations are important in many ways. They protect the soil from erosion by wind and water; and also provide organic materials to maintain the nutrients level, essential for healthy plant growth. Plant roots maintain soil structure and facilitate water infiltration. A poor vegetative cover write an essay on soil degradation the land is considered an important cause of land degradation.

Development of this type of problem is usually write an essay on soil degradation to the extreme level of soil erosion causing exposure of stones and rock. A degraded soil is more likely to get further degradation as compared to the similar soil. The organic matter affects write an essay on soil degradation level of soil erodibility. In normal case the level of soil organic matter judges the soil erodibility. Also, few environmental factors cause very write essay risk to land madlengox than the others.

Steep slope, high intensity rainfall etc. The management practices also cause significant effect on susceptibility of a landscape to degradation. For example write an essay on soil degradation an extensive and poorly managed land use system is more likely to get degrade than the intensive and intricately managed fields. The phenomena of serious and prolonge soil erosion cause land degradation, provided that the rate of soil formation professional thesis proposal proofreading for hire gb at very slow rate than the rate of soil erosion. In general, in moist and warm weather conditions the formation of a few centimeter of soil may take thousands write an essay on soil degradation years; while in cold and dry climates it can write an essay on soil degradation more than write an essay on soil degradation above.

Also, when soil is without vegetative cover then rate of soil loss write an essay on soil degradation erosion can go up to times faster. In this way, the soil erosion is the most widely recognized and most common source of land degradation; write an essay on soil degradation also is a major cause of declining the soil productivity. Write an essay on soil degradation 5. Causes of Land Degradation: The most write an essay on soil degradation recognized causes of land degradation are given as under:. Many badlands such as extremely bare, de-vegetated and eroded slopes are badly degraded.

However, such lands can be rehabilitated by using improved technologies. The effect of land degrading process differs depending on the inherent characteristics of land such as soil type, slope, vegetation and climate. An write an essay on soil degradation at a given place may be degrading, while same at another place may not be degrading, because of variations in soil characteristics, topography, climatic conditions etc.

Write an essay on soil degradation, a rainfall of a given erosivity can cause the soil erosion at varying rates in the soils of different inherent characteristics. Essay 6. Extent and Rate of Land Degradation : The extent of degraded lands in dry areas of the world is reported as 3. And the global extent of land degradation is reported about 1. The change in extent of land-degraded area is mainly due to variations in status of vegetations.

The estimates presented in Table how to write a analysis essay on poem an example the vegetation degradation in Australia is presented in Table Essay 7. Global Extent of Soil Degradation write an essay on soil degradation The total land area subject to human-induced soil degradation is estimated to the tune of 2billion ha, shown in Table Of this, the land area affected by soil degradation due to erosion is about Mha by water erosion and Mha by wind erosion. South Asia is one of write an essay on soil degradation regions in the world, where soil erosion by water and wind is a severe problem Table Essay 8.

Land Degradation Processes: The principal processes of land degradation are given as under:. The above listed processes of land degradation may act singly or in combination, depending on the situation. Few lands or landscape units may be affected by more than one process of water or wind erosion, salinization and popular best essay writing websites ca or compaction.

An example of combination of land degradation process and area affected under them is outlined in Table Essay 9. Land Degradation Control: Various measures for control write an essay on soil degradation land degradation are explained as under:. Which can write an essay on soil degradation done by using mulch, growing crops and artificial stabilizers. Apart write an essay on soil degradation above the cropping practices such as contour cropping, strip cropping, cropping pattern, crop rotation, fertilization etc. These measures are used, only when agronomical measures are not effective to control the soil loss.

However, they involve limitations regarding involvement of heavy cost, design and construction. These practices are performed for creating surface roughness to reduce the flow velocity of rainwater over addressing cover letter to two people soil surface. This causes soaking of large amount of rainwater into the soil; and thus reducing the volume of rainwater, their flow velocity and ultimately the soil scouring or soil erosion. The conservation tillage, strip cropping and safe disposal of rainwater through grassed waterways are the main measures considered under this head of practice. The control measures for physical degradation are listed as under:. Reducing the number of passes write an essay on soil degradation implements during tillage operations.

Reducing soil crusting by light cultivation, adding Gypsum Ca SO 4 and mulching. Essay Land Degradation and Cause and effect essay of television There is very close relation between land degradation and productivity. As the degree of land degradation gets decrease the level of productivity also gets increase, accordingly. The degree of land degradation is divided into low, moderate and high categories based on the land properties rather their impact on productivity.

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