1麻烦问一下什么是 “on-site” and “off-site” effects of soil erosion 反馈 收藏
Effects of soil erosion on crop productivity of southern soils. In: R.F. Follett and B.A. Stewart (Ed- itors), Soil Erosion and Crop Productivity. Am. Soc. Agron Madison, WI, pp. 252-270.Langdale, G.W., H.P. Denton, A.W. White, J.W. Gilliam, and W.W. Frye. 1985. ...
Soil erosion also changes the depth of soil, reducing the amount of earth available for roots to take hold. Some species of plants lay down extensive root systems, both to absorb nutrients in harsh environments and to protect the plants against uprooting by storms, flood, or animal activity. ...
Causes of Soil Erosion All soils undergo soil erosion, but some are more vulnerable than others due to human activities and other natural causal factors. The severity of soil erosion is also dependent on the soil type and the presence of vegetation cover. Here are few of the major causes of...
Low infiltration rate and high levels of soil erosion are critical problems in many soils worldwide. Amendment of soils with organic polymers could alleviate these problems. The objective of the present study is to investigate the effect... G Levy,M Agassi - 《Soil Research》 被引量: 90发表...
Soil erosion is a key factor in Mediterranean environments, and is not only closely related to geoecological factors (lithology, topography, and climatology) but also to land-use and plant cover changes. The long history of human activity in Spain explains the development of erosion landscapes and...
To date, there have been few published reports on these conditioners and results have been mixed in terms of effectiveness and recommendation. Mostaghimi et al. (1994) conducted soil erosion experiments using SoilTex on a Virginia silt loam and found sediment yield decreased from 27.7 kg (61.1...
D。解析:选项A“increasing oxygen in the air(增加空气中的氧气)”,砍伐森林会减少氧气产生而不是增加。选项B“helping animals find more habitats(帮助动物找到更多栖息地)”,砍伐森林会破坏动物栖息地而不是帮助。选项C“reducing soil erosion(减少土壤侵蚀)”,森林有保持水土的作用,砍伐森林会加剧土壤侵蚀。选项...
soil erosion and protect soil resources in citrus orchard development.[Method] The physico-chemical properties in different treatmentplots were analyzed by field experimental observation and analysis indoor taking the clean tillage as control,and status of soil fertility was evaluated by the method of ...
The variation is more obviously during the condition of the rainfall density of 1.0 mm/min. The total amounts of sediment do not change obviously with the rainfall. From the above, effects of soil surface roughness on soil erosion have the relationship not only with rainfall duration but also...