Título:	Soil spatial variability and the estimation of the irrigation water depth.
Autor:	REICHARDT, K. SILVA, J. C. de A. BASSOI, L. H. TIMM, L. C. OLIVEIRA, J. C. M. de BACCHI, O. O. S. PILLOTTO, J. E.
Afiliación:	Klaus Heichardt; José Carlos de Araújo Silva; LUIS HENRIQUE BASSOI, CPATSA; Luís Carlos Timm; Julio Cesar Martins de Oliveira; Osny Oliveira Santos Bacchi; João Eduardo Pilotto.
Año:	2001
Referencia:	Scientia Agricola, Piracicaba, v. 58, n. 3, p. 549-553, jul./set. 2001.
Descripción:	The effects of soil water spatial variability previous to irrigation and of the field capacity on the estimation of irrigation water depth are evaluated. The experiment consisted of a common bean (Phaseolus vulgaris L.) crop established on a Kandiudalfic Eutrudox of Piracicaba, SP, Brazil, irrigated by central pivot, in which soil water contents were evaluated with a depth neutron gauge, in a grid of 20x4 points with lag of 0.5 m. In a given situation, the 80 calculated irrigation water depths presented a coefficient of variation of 29.3%, with an average water value of 18 mm, maximum of 41 mm and minimum of 9 mm. It is concluded that the only practical way of irrigation is the use of an average water depth, due to the inherent variability of the soil, and that the search for better field capacity values does not imply in better water depth estimates.
Thesagro:	Água Irrigação Profundidade Umidade do Solo
NAL Thesaurus:	field capacity
Palabras clave:	Capacidade de campo Espaco Variabilidade Irrigation water depth Soil moisture Spatial variability
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPATSA)