Fecha/hora: 16/06/2024 15:59:34

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	21/02/2014	
Fecha de la última actualización: 	25/01/2019	
Autoria: 	MORON, A.; COZZOLINO, D.	
Afiliación: 	DAVID ALEJANDRO MORON YACOEL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DANIEL COZZOLINO GÓMEZ, Australian Wine Research Institute, Urrbrae, Adelaide, Australia.	
Título: 	Measurement of phosphorus in soils by near infrared reflectance spectroscopy: effect of reference method on calibration.	
Año de publicación: 	2007	
Fuente/Imprenta: 	Communications in Soil Science and Plant Analysis, 2007, volume 38, Issue 15-16, pages 1965-1974 .	
ISSN: 	print 0010-3624 / 1532-2416 online	
DOI: 	10.1080/00103620701548498	
Idioma: 	Inglés	
Notas: 	Article history: Received 17 May 2006 // Accepted 04 Dec 2006 // Published online: 04 Sep 2007.	
Contenido: 	ABSTRACT.
The use of ultraviolet (UV), visible (VIS), near infrared reflectance (NIR), and midinfrared (MIR) spectroscopy techniques have been found to be successful in determining the concentration of several chemical properties in soils. The aim of this study was to evaluate the effect of two reference methods, namely Bray and Resins, on the VIS and NIR calibrations to predict phosphorus in soil samples. Two hundred (n=200) soil samples were taken in different years from different locations across Uruguay with different physical and chemical characteristics due to different soil types and management. Soil samples were analyzed by two reference methods (Bray and Resins) and scanned using an NIR spectrophotometer (NIRSystems 6500). Partial least square (PLS) calibration models between reference data and NIR data were developed using cross&#8208;validation. The coefficient of determination in calibration (R2) and the root mean square of the cross validation (RMSECV) were 0.58 (RMSECV: 3.78 mg kg&#8722;1) and 0.61 (RMSECV: 2.01 mg kg&#8722;1) for phosphorus (P) analyzed by Bray and Resins methods, respectively, using the VIS and NIR regions. The R2 and RMSECV for P using the NIR region were 0.50 (RMSECV: 3.78 mg kg&#8722;1) and 0.58 (RMSECV: 2.01 mg kg&#8722;1). This study suggested that differences in accuracy and prediction depend on the method of reference used to develop an NIR calibration for the measurement of P in soil.
@Taylor & Francis Group, LLC	
Palabras-Clave: 	NEAR INFRARED REFLECTANCE; P-BRAY; P-RESINS; PHOSPHORUS; SOIL; VISIBLE.	
Categoría del tema: 	P01 Conservación de la naturaleza y recursos de La tierra	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (3356-1) - PXI - AP - DD - PP/COMMUN.SOIL SC./2007 -  -  - DIS