Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52908#.VKyXzsnQrzE Author(s)   Paula Cerezini 1 , Antonio Eduardo Pípolo 2 , Mariangela Hungria 2 , Marco Antonio Nogueira 2   Affiliation(s) 1 Department of Agronomy, Universidade Estadual de Londrina, Londrina, Brazil . 2 Embrapa Soybean, Londrina, Brazil . ABSTRACT Biological nitrogen fixation (BNF) in soybean is vulnerable to drought; however, there are genotypic variations among soybean cultivars regarding the ability to keep BNF under moderate water restriction. The aim of this study was to evaluate parameters related to gas exchanges and regulation of BNF in soybean genotypes BNF drought-tolerant (R01-581F and R01-416F), or drought-susceptible (CD 215 and BRS 317), submitted to adequate water supply or restriction between 45 and 55 days after emergence. We searched for traits associated with tolerance/susceptibility to drought, which might be us...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52216#.VIj4jcnQrzF Author(s)      Alexandre Martins Abdão dos Passos 1* , Pedro Milanez de Rezende 2 , Everson Reis Carvalho 2 , Andréia Marcilane Aker 3 Affiliation(s) 1 EMBRAPA Rondonia, Porto Velho, Brazil . 2 Federal University of Lavras (UFLA), Lavras, Brazil . 3 Federal University of Rondonia (UNIR), Rolim de Moura, Brazil . ABSTRACT The use of organic wastes, as an alternative to inorganic fertilizer, can be an important strategy for Brazilian and tropical agriculture. Despite the importance, few field studies have been done evaluating organic amendments on soybean crops in Brazil. The study aimed to evaluat...