\documentclass[english,german]{scrartcl}
\usepackage[latin1]{inputenc}
\usepackage{geometry}
\geometry{verbose,a4paper,tmargin=1.75cm,bmargin=2cm,lmargin=2cm,rmargin=2cm,headheight=0.8cm,headsep=0.5cm,footskip=0.5cm}
\usepackage{babel}
\usepackage{url}
\urlstyle{same}
\newcommand\email{\begingroup \urlstyle{same}\Url}\usepackage{graphicx}
\usepackage{units}
\usepackage{tabularx}
\usepackage{wasysym} % enable use of \permil instead of \textperthousand
\usepackage{marvosym}
\usepackage{arabtex}
\usepackage{hyphenat}
\usepackage{booktabs}
\usepackage{mdwlist}
\renewcommand{\thefootnote}{\relax}
\usepackage{index}
\newindex{key}{kdx}{knd}{Keywords}
\newindex{author}{idx}{ind}{Authors}
\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\fancyfoot{}
\usepackage{ifpdf}
\ifpdf
%\usepackage[activate]{pdfcprot}
%\usepackage[owner=Tapioka, print=true, copy=true, edit=false, annotate=false,set]{pdfcrypt}
%encryption: not supported any more (since pdftex 1.10)
\usepackage[pdftex]{thumbpdf}
\usepackage[pdftex]{hyperref}
\hypersetup{pdftitle={Response of \textit{Clitoria ternatea} and \textit{Vigna unguiculata} to Inoculation with \textit{Rhizobium} and \textit{Bradyrhizobium} Strains in Salt"=affected Soils in the Cauto Valley, Cuba},pdfauthor={Raúl C. López Sánchez, Ernesto Gómez Padilla, Bettina Eichler-Loebermann, Mercedes Fernández-Pascual, Beatriz Ruiz-Díez, Roeland Samson, Patrick van Damme},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Legumes, nitrogen fixation, salt stress},pdfpagemode=None,colorlinks=true}
\else
\usepackage{ae}
\usepackage{textcomp}
\fi
\begin{document}
\ifpdf
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2010.jpg}}}
\else
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2010.eps}}}
\fi
\hfill
\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
\hspace{0.1cm}
\begin{center}
\Large{\textbf{Response of \textit{Clitoria ternatea} and \textit{Vigna unguiculata} to Inoculation with \textit{Rhizobium} and \textit{Bradyrhizobium} Strains in Salt"=affected Soils in the Cauto Valley, Cuba\footnote{\textbf{Contact Address:} Raúl C. López Sánchez, University of Granma, Faculty of Agricultural Sciences, Marti 4141 altos entre C.Montero  y J. Medina, 85100~Bayamo, Cuba, \mbox{e-mail}: \email{rlopezs@udg.co.cu}}\\[0.8ex]}}
\normalsize{\textsc{Raúl C. López Sánchez$^{1}$, Ernesto Gómez Padilla$^{1}$, Bettina Eichler-Loebermann$^{2}$, Mercedes Fernández-Pascual$^{3}$, Beatriz Ruiz-Díez$^{3}$, Roeland Samson$^{4}$, Patrick van Damme$^{5}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$University of Granma, Faculty of Agricultural Sciences, Cuba}}}
\item[]{\small{\textit{$^{2}$University of Rostock, Faculty of Agricultural and Environmental Sciences, Germany}}}
\item[]{\small{\textit{$^{3}$Council of Higher Scientific Investigation, Spain}}}
\item[]{\small{\textit{$^{4}$University of Antwerp, Department of Bioscience Engineering, Belgium}}}
\item[]{\small{\textit{$^{5}$University of Ghent, Department of Plant  Production - Laboratory for Tropical Agronomy, Belgium}}}
\end{itemize*}
\index[author]{López Sánchez, Raúl C.}
\index[author]{Gómez Padilla, Ernesto}
\index[author]{Eichler-Loebermann, Bettina}
\index[author]{Fernández-Pascual, Mercedes}
\index[author]{Ruiz-Díez, Beatriz}
\index[author]{Samson, Roeland}
\index[author]{van Damme, Patrick}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
In Cuba, about \mbox{1.000.000\,ha} of crop soils are affected by salinity. This also causes considerable losses in pasture yields and animal production. One of the alternatives to improve the fertility of these soils is the use of salt"=tolerant legume species.  Legumes may help to (1)~improve the quality of salt"=affected soils due to their capacity to fix atmospheric nitrogen (N) in symbiosis with \textit{Rhizobium}; (2)~increase soil organic matter; (3)~serve as a protection against erosion; and (4)~improve soil structure. The response of two tropical legume species, \textit{i.e. Clitoria ternatea} and \textit{Vigna unguiculata}, inoculated with native and commercial \textit{Rhizobium} and \textit{Bradyrhizobium} strains was studied under soil salt stress conditions. The study was carried out under field conditions. The effect of three \textit{Rhizobium}  strains (Jd19, 1031 and 1032) in \textit{C. ternatea} and two \textit{Bradyrhizobium} strains (VIBA"=1 and VIBA"=2) in \textit{V.~unguiculata} were compared to a control (without fertilisation and inoculation). using yield and nitrogen fixation parameters. In \textit{C. ternatea}, Jd 19 had the highest effects on dry matter yield, ureide content and N accumulation. The inoculation effectiveness index was very close to the nitrogen response index for this species. In \textit{V.~unguiculata}, results show \textit{Bradyrhizobium} strains to have a beneficial effect on different variables. Especially VIBA"=1, improved nodule number, their dry mass and specific nitrogen fixation, as well as eventual crop yield.  The highest effectiveness index value was also obtained when using VIBA"=1.VIBA"=2 showed better results than control.  Positive linear and highly significant correlations were found between nodulation and nitrogen fixation, and total nitrogen content in plant tissue and plant yield.



}

\vspace{0.5cm}
\end{abstract}
\end{center}
\noindent \textbf{Keywords:} Legumes, nitrogen fixation, salt stress
\index[key]{Legumes}
\index[key]{Nitrogen!fixation}
\index[key]{Salt!stress}
\end{document}