%0 Journal Article
%T Avalia£¿£¿o de m¨¦todos de determina£¿£¿o de ¨¢gua dispon¨ªvel e manejo da irriga£¿£¿o em terra roxa sob cultivo de algodoeiro herb¨¢ceo
%A Souza
%A Carlos Cleide de
%A Oliveira
%A Francisco Assis de
%A Silva
%A Ivandro de Fran£¿a da
%A Amorim Neto
%A Malaquias da Silva
%J Revista Brasileira de Engenharia Agr¨ªcola e Ambiental
%D 2000
%I Departamento de Engenharia Agr¨ªcola - UFCG
%R 10.1590/S1415-43662000000300006
%X this study was conducted in greenhouse conditions at the dser/cca/ufpb, located in areia, pb, brazil. the main objective was to evaluate two methods of determination of available soil water, a direct method (dm) and a laboratory method (lm), and the effect of three levels of available water, 10, 25 and 40% as indicative of irrigation management in cotton crop (gossypium hirsutum l. r. latifolium hutch). a completely randomized block was utilized in a 2 x 3 factorial scheme, with three replications. the variance analysis showed that the values of the available soil water using the direct method were significantly (p < 0.01) higher than the laboratory method. the management of irrigation in the cotton crop using 40% of available water by dm, showed better results of evapotranspiration, leaf area and above ground biomass. interaction of methods versus levels of available water for all variables studied was also found.
%K gossypium hirsutum
%K irrigation
%K yield.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1415-43662000000300006&lng=en&nrm=iso&tlng=en