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Tree plantation such as tea and rubber plantation cause low rates of soil erosion. Higher rates of soil erosion are caused by crops which are harvested annually like potatoes, most vegetables and tobacco. [11] Soil degradation in the dry zone leads to desertification. The loss of soil also is a big problem near watersheds, because a lot of ...
The Civil War in Sri Lanka arose from ethnic tensions between the Sinhala people and the Tamil minority. The Liberation Tigers of Tamil Eelam also known LTTE stopped cutting trees in the areas they occupied because the trees provided them with leaves that allowed them to practice guerilla warfare. In response, the opposition - the national ...
According to the U.N. FAO, 28.8% of Sri Lanka was forested in 2010 (about 1,86 million hectares). In 1995, it was 1.94 million hectares or 32.2% [11] of the land area that was classified as dense forests while the balance 0.47 million hectares or 7% the land area classified as open forests.
Sinhala: Muhudu Bimthamburu, English: Beach Morning Glory, Tamil: Atampu (Ipomoea pes-caprae) Sinhala: Maha rawana revula , Tamil: Ravannan meesai ( Spinifex littoreus ) The vegetation gradually become stable a distance away from the tide mark, with the stabilization of the soil.
The jet erosion test (JET), or jet index test, is a method used in geotechnical engineering to quantify the resistance of a soil to erosion. The test can be applied in-situ after preparing a field site, or it can be applied in a laboratory on either an intact or a remolded soil sample .
[34] [35] There is growing evidence that tillage erosion is a major soil erosion process in agricultural lands, surpassing water and wind erosion in many fields all around the world, especially on sloping and hilly lands [36] [37] [38] A signature spatial pattern of soil erosion shown in many water erosion handbooks and pamphlets, the eroded ...
Most soil erosion models consider only soil erosion by water, however a few aim to predict wind erosion. Models which consider tillage erosion are rare. Also soil erosion models have been more commonly developed for use on agricultural landscapes, rather than on naturally vegetated areas (such as rangeland or forests).
Upload file; Search. Search. ... At roadsides and waterways the tree provides a good windbarrier and protection from water-driven soil erosion. [2] ... (PDF) on 16 ...