%0 Journal Article
%T N¨ªvel cr¨ªtico de f¨®sforo em cultivares de algod£¿o I: crescimento em fun£¿£¿o dos n¨ªveis externos de f¨®sforo
%A Medeiros
%A A.A.de
%A Haag
%A H.P.
%J Anais da Escola Superior de Agricultura Luiz de Queiroz
%D 1990
%I Scientific Electronic Library Online
%R 10.1590/S0071-12761990000100006
%X in order to establish the critical level of phosphorus in annual varieties of iac-17, lac-19, iac-20, cnpa 78/sme-4 and in perennial varieties cnpa 2m and cnpa 3m, young cotton plants were grown in nutrient solutions containing the following phosphorus concentrations: 0.38ppm, 1.14ppm, 3.42ppm, 10.26ppm and 30.78ppm. plants were harvested when 75 days old. plant height and dry weight of roots, stem and leaves were determined. the authors concluded that available p for all varieties is in the range between 19.20 and 21.9ppm.
%K cotton
%K varieties
%K phosphorus
%K plant growth.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0071-12761990000100006&lng=en&nrm=iso&tlng=en