Global ETD Search
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Showing 1 to 13 of 13 for “"Soil losses"”.
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The technique of plot study to determine soil losses and runoff under field conditions due to fertilizer treatment
… stations have conducted studies dealing with soil and water losses under a wide range of conditions, but no study has been conducted on plots under actual field cultural conditions. These investigations have been very valuable in that they have revealed much needed information but they have …
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Risk Analysis of Adopting Conservation Practices on a Representative Peanut-Cotton Farm in Virginia
… pesticide, nitrogen, phosphorus, and sediment losses of a representative risk-neutral and risk-averse peanut-cotton farmer in Southeast Virginia. Five currently popular rotations and eight alternative conservation rotations are evaluated for the representative farm. The Erosion-Productivity …
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Estimating Sediment Losses Generated from Highway Cut and Fill Slopes in the Lake Tahoe Basin
… Lake Tahoe. Furthermore, accurate predictions of soil losses from these cut and fill slopes are required to establish baseline sediment loadings, assess the effectiveness of slope stabilization improvements and track the progress towards achieving Total Maximum Daily Load (TMDL) reduction …
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Análise da evolução do uso e ocupação do solo e das perdas de solo na bacia experimental do riacho Guaraíra.
… the evolution of the use and occupation and soil loss in the Guaraíra River Experimental Basin to 1974 and 2012, using remote sensing techniques, GIS software ArcGIS 9.3 and the empirical equations USLE and PNE. The results obtained from temporal analysis of the use and occupation of soils …
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Análise espacial das perdas de solo no Estado da Paraíba
This study aimed to analyze the soil losses in the state of Paraiba. To study soil loss equation was used to Universal Soil Loss - USLE coupled to an Information System GIS geographically. By multiplying factors K, R, LS, C and P, were necessary data such as time series of rainfall, soil map, …
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Evaluation of the universal soil loss equation on a selected reclaimed eastern surface mine area
… evaluate the the predictability of the Universal Soil Loss Equation for a selected eastern surface mine spoil. Comparison of predicted and measured soil losses indicated significant error. For slopes greater than 20% the equation overpredicted for all predictions. Predictions for erosion losses …
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Land use change and natural Araucaria forest degradation : northeastern misiones - Argentina
… change after deforestation and their impacts on soil resource in the Province of Misiones. Whit this goals, processes combining air photography interpretation, air and terrestrial recognition and multi-temporal satellite imagery analysis, with the support of geographic information systems (GIS) …
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Análise do risco à erosão do solo no município de Lucena - Paraíba.
… that occur in all environments, but the risk of soil destruction in Brazilian regions is very high due to the susceptibility of Brazilian soils to erosion. The soil loss in Brazil are derived from factors external geodynamics of the Earth, such as floods and floods, landslides of soil and / or …
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A Whole-Farm Planning Decision Support System for Preventive Integrated Pest Management and Nonpoint Source Pollution Control
… nitrate and pesticide leaching and runoff, and soil erosion. The system is composed of a constraint satisfaction planner (CROPS-LT), a modified version of CROPS (Stone, 1995), a farm-level resource management system (FLAME), an NPS module, which includes a weather generator, CLIGEN (Nicks et al. …
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An economic analysis of low-input agriculture as a groundwater protection strategy
… of runoff, groundwater, and sediment; and the soil erosion from each of these scenarios. The model shows that yields, labor requirements, and variable costs, individually have a weak influence on the adoption of low-chemical and organic production activities. The price of the organic nitrogen …
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Analyzing the Economic and Environmental Impacts of Agricultural Alternatives - the Case of Virginia's Eastern Shore
… program, was used to estimate the potential soil erosion, pesticide leaching and runoff, nitrogen leaching, and phosphorous runoff for different scenarios. The model shows that some of the new vegetable commodities could substantially increase the net returns of the farming operations in …
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Soil erosion and suspended sediment dynamics in intensive agricultural catchments
… ecological habitats. Management of accelerated soil losses and the transmission of sediment-associated agricultural pollutants, such as phosphorus, is required to mitigate the drive towards sustainable intensification to increase global food security. Quantifying soil erosion and the pathways …
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Development and testing of experimental equipment to measure pore pressure and dynamic pressure at points outside a pipe leak
… interaction between the leaking water and the soil surrounding the distribution main. This interaction is known as the leak - soil interaction. Research has found that a phenomenon called internal fluidisation typically occurs in the soils outside of leaks in distribution mains. Internal …