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Fixação de nitrogênio por bactérias diazotróficas em cultivares de arroz irrigado
(Universidade Federal de Santa Maria, 2006-12-15)
Rice is a very important culture in the South of Brazil, with productivity mean of 6 t ha-1, requiring large amounts of nitrogen. The biological nitrogen fixation (BNF) has already been established for legumes and in ...
Interação da rizipiscicultura com agroquímicos e efeitos sobre a comunidade zooplanctônica
(Universidade Federal de Santa Maria, 2006-03-06)
The objective of this experiment was to determine the lethal concentration (LC50;96h) of azimsulfuron (A) and metsulfuron-methyl (M) herbicides and carbofuran (C) insecticide for common (Cyprinus carpio), grass (Ctenopharyngodon ...