soil erosion; challenges, costs and its conservation benefits
نویسندگان
چکیده
in future, soil erosion will be a great challenge for biosphere. if the soils today are notprotected carefully hunger crises all over the world will be widespread. the present article endeavorsto survey soil erosion process and approaches to prevent it. furthermore the article tries to review therelation between soil character and soil production capability shedding light on the effect of erosion onsoil characters. there will also be a review of presented models by pimentel and et al (1995). finallythe results of economic valuation of erosion damages in different parts of the world will be analysed.cost – benefit analysis will be done with regard to soil erosion. the article will be concluded byplacing emphasis on the importance of economic valuation of erosion and the necessity of soilprotection
منابع مشابه
Environmental and economic costs of soil erosion and conservation benefits.
Soil erosion is a major environmental threat to the sustainability and productive capacity of agriculture. During the last 40 years, nearly one-third of the world's arable land has been lost by erosion and continues to be lost at a rate of more than 10 million hectares per year. With the addition of a quarter of a million people each day, the world population's food demand is increasing at a ti...
متن کاملSocio-economic factors in soil erosion and conservation
Farmer decisions with regard to production and land use are strongly influenced by socio-economic factors. In the developed world, the role of agricultural subsidies, quotas and guaranteed prices is especially important. In the past there have been many examples of economic signals which led to unfortunate and unforeseen environmental consequences (‘perverse subsidies’), including soil erosion....
متن کاملValuing Soil Conservation Benefits of Agroforestry Practices
Although advocates of agroforestry have promoted soil conservation as one of its primary benefits, empirical estimates of these benefits have been lacking due to temporal and spatial complexity of agroforestry systems and soil resource dynamics. This study aims to reduce this gap by designing and testing a three stage farm level productivity methodology for economic evaluation of soil conservat...
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عنوان ژورنال:
انسان و محیط زیستجلد ۸، شماره شماره ۳(۱۴-پیاپی ۲۵)، صفحات ۴۷-۵۷
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