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	Provedor de dados AgEcon (1) AGRIAMBI (1) Autor Cooke,Richard A. (1) Grah,Vanessa de F. (1) Kerselaers, Eva (1) Lauwers, Ludwig H. (1) Lenders, Sonia (1) Miranda,Jarbas H. de (1) Ponciano,Isaac de M. (1) Silva,Alisson J. P. da (1) Vervaet, Mieke (1) Vervloet, Dirk (1) Mais... Palavra-chave Central limit theorem (2) Agricultural and Food Policy (1) C10 (1) Electrical conductivity (1) Instrumentation (1) O18 (1) OECD (1) R12 (1) Rural development (1) Rurality index (1) Mais... Tipo do documento Conference Paper or Presentation (1) Info:eu-repo/semantics/article (1) Ano 2016 (1) 2005 (1) País Brazil (1) United States (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Alternative Territorial Breakdowns of Statistics for Supporting Rural Policies AgEcon Lauwers, Ludwig H.; Kerselaers, Eva; Lenders, Sonia; Vervaet, Mieke; Vervloet, Dirk. In order to support rural policy making with appropriate information, alternative territorial breakdowns of statistics are necessary. This paper shows how the widely used criterion of 150 inhabitants per km² can be fine tuned to better account for local specific conditions, in particular high population densities. Alternative population density thresholds are confronted with local perceptions of rurality, aggregated in a rurality index. The method is illustrated for two regions that differ in urbanisation level. The rurality index not only increases the discriminatory power, but also helps to find a less erroneous and more robust proxy for international comparable breakdowns of statistics. Tipo: Conference Paper or Presentation Palavras-chave: Rural development; Rurality index; OECD; Central limit theorem; Agricultural and Food Policy; C10; O18; R12. Ano: 2005 URL: http://purl.umn.edu/24635 Metrological assessment of TDR performance for measurement of potassium concentration in soil solution AGRIAMBI Ponciano,Isaac de M.; Miranda,Jarbas H. de; Cooke,Richard A.; Grah,Vanessa de F.; Silva,Alisson J. P. da. ABSTRACT Despite the growing use of the time domain reflectometry (TDR) technique to monitoring ions in the soil solution, there are few studies that provide insight into measurement error. To overcome this lack of information, a methodology, based on the central limit theorem error, was used to quantify the uncertainty associated with using the technique to estimate potassium ion concentration in two soil types. Mathematical models based on electrical conductivity and soil moisture derived from TDR readings were used to estimate potassium concentration, and the results were compared to potassium concentration determined by flame spectrophotometry. It was possible to correct for random and systematic errors associated with TDR readings, significantly... Tipo: Info:eu-repo/semantics/article Palavras-chave: Central limit theorem; Instrumentation; Electrical conductivity. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400343 Registros recuperados: 2 Primeira ... 1 ... Última

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