in this paper, we report an investigation of changes in land use and ecosystem services on loess plateau in northern shaanxi province from 1978 to 2004. we used three landsat tm and/or etm data sets to estimate changes in the size of five land-cover/land-use categories, and we also used previously published value coefficients to estimate changes in the value of ecosystem services delivered by e...

Conservation tillage (CT) systems have a number of potential benefits including lower crop production costs and the ability to reduce soil erosion that have made them common in several regions of the world. Although CT systems have been researched and successfully implemented on some farms in California's San Joaquin Valley (SJV), overall adoption is low and the reasons for the region's compara...

value literally means to assess the worth of something against something else. the importance ofthe assessment of this word in the economic areas in a few past years has led the recognition of urban values especiallyin their historical parts. it is hypothesis that recognition, assessment, and introducing the existing values in historicalcities have a direct relationship with the selection of th...

according to the non-physical aspects of conservation in the world today and intangible effects were considered serious. conservation process, but help to understand the purpose and effect of not reading, but perception is a matter of epistemological roots in philosophy and  in modern philosophy the process of understanding a monument-art conservation in connection with the audience is importan...

soil conservation is one of the most important regulative functions of natural ecosystems. this function is of high importance in taleghan watershed due to high erosion quantity and sediment accumulation in taleghan dam reservoir. soil loss reduction, sedimentation control and fertility conservation were considered as different aspects of soil conservation. effect of land use and vegetation cov...

forests and rangelands are the most important natural ecosystems which provide many economic benefits to the society due to their biodiversity and ecological functionalities. dashtenaz wildlife refuge, sari, is a sylvan region, covering 55 ha of rangeland with abundant diversity, is refuge of an endangered species of deer called dama mesopotamica. in this study, contingent valuation method (cvm...