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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 ...
This has accelerated sea erosion, salt water intrusion and land degradation. Anthropogenic fires, particularly in savanna forests and grasslands, have led to the systematic degradation of forest habitats facilitating the spread of invasive species and consequently affecting natural regeneration of native species.
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.
[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 ...
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.
Few soil erosion models consider gully erosion, mostly due to difficulties in modelling these large erosional features. Several studies have evaluated the ability of soil erosion models to realistically predict measured rates of erosion, mainly on agricultural landscapes. There is often a wide discrepancy between predicted and observed erosion ...
Chena is the oldest cultivation method in Sri Lanka, it goes far back as more than 5,000 years.(Before the Anuradhapura Kingdom) [1] [2] it the dry zone, the recovery of a chena plot proceeds through various stages of succession, (active chena, abandoned chena, chena re-growth, scrub with pioneer three species, scrub with secondary tree species, secondary forest, secondary forest with primary ...
Upload file; Search. Search. ... Download as PDF; ... At roadsides and waterways the tree provides a good windbarrier and protection from water-driven soil erosion. [2]