Data/hora: 02/06/2024 10:27:26

Provedor de dados: 	Engenharia Agrícola	
País: 	Brazil	
Título: 	GPS receivers for georeferencing of spatial variability of soil attributes	
Autores: 	Rosalen,David L; Rodrigues,Marcos S; Chioderoli,Carlos A; Brandão,Flavia J. C; Siqueira,Diego S.	
Data: 	2011-12-01	
Ano: 	2011	
Palavras-chave: 	Precision agriculture; GNSS; Compaction; Soil water content.	
Resumo: 	The characterization of the spatial variability of soil attributes is essential to support agricultural practices in a sustainable manner. The use of geostatistics to characterize spatial variability of these attributes, such as soil resistance to penetration (RP) and gravimetric soil moisture (GM) is now usual practice in precision agriculture. The result of geostatistical analysis is dependent on the sample density and other factors according to the georeferencing methodology used. Thus, this study aimed to compare two methods of georeferencing to characterize the spatial variability of RP and GM as well as the spatial correlation of these variables. Sampling grid of 60 points spaced 20 m was used. For RP measurements, an electronic penetrometer was used and to determine the GM, a Dutch auger (0.0-0.1 m depth) was used. The samples were georeferenced using a GPS navigation receiver, Simple Point Positioning (SPP) with navigation GPS receiver, and Semi-Kinematic Relative Positioning (SKRP) with an L1 geodetic GPS receiver. The results indicated that the georeferencing conducted by PPS did not affect the characterization of spatial variability of RP or GM, neither the spatial structure relationship of these attributes.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600013	
Editor: 	Associação Brasileira de Engenharia Agrícola	
Relação: 	10.1590/S0100-69162011000600013	
Formato: 	text/html	
Fonte: 	Engenharia Agrícola  v.31 n.6 2011	
Fonte: 	info:eu-repo/semantics/openAccess