Soil erosion processes

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  • Soil erosion affects a large part of the Earth surface, and it represents one of the most relevant environmental problems worldwide. Intense land degradation processes that destroyed civilizations in the past are still going on at present. Accelerated soil erosion is one of the main soil threats, as the natural balance between soil formation and loss may be seriously compromised, leading to desertification and permanent loss of fertility and protective function. Soil erosion is not only related to agricultural activities and farming practices, but also to land management in general....

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  • Soil loss for erosion is a natural phenomenon in soil dynamics, influenced by climate, soil intrinsic properties, and morphology, that can both trigger and enhance the process. Anthropic activities, like inappropriate agricultural practices, deforestation, overgrazing, forest fires and construction activities, may exert a remarkable impact on erosion processes or, on the other hand, contribute to soil erosion mitigation through a sustainable management of natural resources.

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  • “Essentially, all life depends upon the soil. There can be no life without soil and no soil without life; they have evolved together.” - Charles E. Kellogg, USDA Yearbook of Agricul‐ ture, 1938. Natural processes and human activities alter the properties and quality of soils over time. The assessment of soil quality entails the evaluation of the capability of a soil to perform its functions not only in present scenarios but also how those functions can be preserved for future land...

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  • Biologicalmicroorganismsare important tomaintainaproductive soil.Energy cropsusually supportamorediversemicrobialpopulationthantypicalagriculturalrowcrops.Somestudies suggestthatenergycropschangetheagriculturallandbiotatotheonesquitesimilartoforest environment.Increasedsoilcarbon,moreconsistentsoilmoisture,lowersoiltemperature(due topropercover)helpintherestorationoftheagriculturallandbiota.

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  • First, recall that the SNIFF emissions inventory discussed above clearly indicates that industry is not the leading source of particulate emissions in Ciudad Juárez. Rather, the leading sources are vehicles, unpaved roads, and soil erosion (Table 1). Moreover, even leaving aside vehicles and soils, the single most important industrial subsector in terms of air pollution is brick kilns, not maquiladoras (Table 2). In fact, brick kilns emit more particulate matter than all other industrial plants combined.

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  • Chapter 37 - Soil and plant nutrition. This chapter define soil texture and soil composition; explain why plants cannot extract all of the water in soil; define cation exchange and describe how plants can stimulate the process; discuss the problems of topsoil erosion and farm irrigation in arid regions; suggest actions that can help mitigate these problems;...

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  • Sự xói mòn là quá trình tách ra và chuyển các hạt đất do các tác nhân xói mòn (erosion is the process of detachment and transport of soil particles by erosive agents, Ellison, 1944) Xói mòn là quá trình địa chất tự nhiên Xói mòn do gió Xói mòn do nước Sự di chuyển do canh tác (tillage translocation)

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