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Titolo:
Soil selection for use in environmental analysis
Autore:
Arndt, C; Fecso, B; Preckel, PV; Stoneman, B;
Indirizzi:
Purdue Univ, Dept Agr Econ, W Lafayette, IN 47907 USA Purdue Univ W Lafayette IN USA 47907 Agr Econ, W Lafayette, IN 47907 USA USDA, Conservat Operat Div, Nat Resources Conservat Serv, Washington, DC 20250 USA USDA Washington DC USA 20250 ces Conservat Serv, Washington, DC 20250 USA USDA, Nat Resources Conservat Serv, Richmond, VA USA USDA Richmond VA USA SDA, Nat Resources Conservat Serv, Richmond, VA USA
Titolo Testata:
JOURNAL OF SOIL AND WATER CONSERVATION
fascicolo: 2, volume: 56, anno: 2001,
pagine: 165 - 171
SICI:
0022-4561(2001)56:2<165:SSFUIE>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Keywords:
Gaussian quadrature; sampling; soil sampling; statistical subset;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Arndt, C Purdue Univ, Dept Agr Econ, W Lafayette, IN 47907 USA Purdue Univ W Lafayette IN USA 47907 , W Lafayette, IN 47907 USA
Citazione:
C. Arndt et al., "Soil selection for use in environmental analysis", J SOIL WAT, 56(2), 2001, pp. 165-171

Abstract

Estimating variables, such as erosion rates, across a diverse soil and water resource base is a problem of interest in natural resource management. Here, we propose an alternative to the predominant soils (PS) approach of Stoneman, Brown, and Spivey. Our method, called Gaussian quadrature (GQ) is adapted from the numerical integration literature. Two experiments compare GQ with PS. The first plugs sample input into a simulation model to approximate erosion rates, surface runoff, and crop yield for a region. The second estimates erosion in three regions using the Universal Sail Loss Equation (USLE). Results for the GQ samples are compared to results for the full population and results from random samples. GQ sampling tend to he more effective, particularly with respect to measures related to the heterogeneity of the population, such as the variance and skewness, than PS or random sampling. Judiciously used, GQ sample selection permits reductions in the number of soils sampled with only a moderate loss of accuracy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 09:27:49