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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
28/10/1997 |
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Data da última atualização: |
09/01/2012 |
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Autoria: |
SIMOLEN, M. D.; STORM, D. E.; CHEN, Z.; HAAN, C. T.; GREGORY, M. S.; SABBAGH, G. J. |
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Título: |
Targeting critical nonpoint source areas using a GIS-based phosphorus model. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
In: HEATWOLE, C. D. (Ed.). Application of advanced information technologies: effective management of natural resources. St. Joseph, MI: ASAE, 1993. |
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Páginas: |
p. 493-500. |
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Idioma: |
Inglês |
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Conteúdo: |
A phosphorus loading model and geographic information system (GIS) were used to identify critical areas in a watershed where poultry litter is land applied to pastures. The Geographic Resources Analysis Support System (GRASS) is combined with a continuous simulation daily time-step phosphorus loading model to simulate P loading at the watershed outlet. Sensitivity analyses show that the particulate-borne P declines linearly with increasing vegetative cover and logarathimically with distance from field to stream. Increasing clay content in the soil reduces P loading until the soil's adsorptive capacity is saturated. Computer simulations suggest that, in the test watershed, reductions of 17% to 34% in P loading can be achieved by not allowing poultry litter application to 5% to 17% of the available area. |
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Palavras-Chave: |
Bacias hidrográficas; Estrume de aves; Modelagem; Modeling; Sistemas de informação geográfica. |
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Thesaurus Nal: |
Geographic information systems; Poultry manure; Watersheds. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01712naa a2200289 a 4500
001 1005104
005 2012-01-09
008 1993 bl uuuu u00u1 u #d
100 1 $aSIMOLEN, M. D.
245 $aTargeting critical nonpoint source areas using a GIS-based phosphorus model.
260 $c1993
300 $ap. 493-500.
520 $aA phosphorus loading model and geographic information system (GIS) were used to identify critical areas in a watershed where poultry litter is land applied to pastures. The Geographic Resources Analysis Support System (GRASS) is combined with a continuous simulation daily time-step phosphorus loading model to simulate P loading at the watershed outlet. Sensitivity analyses show that the particulate-borne P declines linearly with increasing vegetative cover and logarathimically with distance from field to stream. Increasing clay content in the soil reduces P loading until the soil's adsorptive capacity is saturated. Computer simulations suggest that, in the test watershed, reductions of 17% to 34% in P loading can be achieved by not allowing poultry litter application to 5% to 17% of the available area.
650 $aGeographic information systems
650 $aPoultry manure
650 $aWatersheds
653 $aBacias hidrográficas
653 $aEstrume de aves
653 $aModelagem
653 $aModeling
653 $aSistemas de informação geográfica
700 1 $aSTORM, D. E.
700 1 $aCHEN, Z.
700 1 $aHAAN, C. T.
700 1 $aGREGORY, M. S.
700 1 $aSABBAGH, G. J.
773 $tIn: HEATWOLE, C. D. (Ed.). Application of advanced information technologies: effective management of natural resources. St. Joseph, MI: ASAE, 1993.
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Embrapa Agricultura Digital (CNPTIA) |
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