\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={Bioassay for  Determination of Seven Crops Sensitivity to Granstar (tribenuron methyl) Soil Residue},pdfauthor={Ebrahim Izadi Darbandi, Mohammad Hasan Rashed Mohassel, Ghadriye Mahmoodi, Mansoore Dehghani },pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Bean, corn, lentil, pea, sugar beet ,rape, tomato, tribenuron methyl},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{Bioassay for  Determination of Seven Crops Sensitivity to Granstar (tribenuron methyl) Soil Residue\footnote{\textbf{Contact Address:} Ebrahim Izadi Darbandi, Ferdowsi University of Mashhad, Department of Agronomy, Azadi Street, Mashhad, Iran, \mbox{e-mail}: \email{eizadi2000@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Ebrahim Izadi Darbandi, Mohammad Hasan Rashed Mohassel, Ghadriye Mahmoodi, Mansoore Dehghani }}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{Ferdowsi University of Mashhad, Department of Agronomy, Iran}}}
\end{itemize*}
\index[author]{Izadi Darbandi, Ebrahim}
\index[author]{Rashed Mohassel, Mohammad Hasan}
\index[author]{Mahmoodi, Ghadriye}
\index[author]{Dehghani , Mansoore}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
Tribenuron methyl  is one of the most important acetolactate synthase inhibitor herbicides using in Iranian wheat field. Its residue persistence in soil is one of the main environmental and agronomical problems. In order to study the sensitivity of seven crops to tribenuron methyl soil residue, a pot experiment was conducted at Ferdowsi University of Mashhad at 2009. Experimental type was completely randomised design in a factorial arrangement with three replications. Treatments included crops ( pea, bean, lentil, corn, rape, beet and tomato) and tribenuron methyl simulated concentration residue in soil (0, 0.00009, 0.0003, 0.0006, 0.001, 0.002 and 0.003 mg kg$^{-1}$ soil). For analysis of results plants emergence was determined after a week of planting and their survival percentage, shoot  and root biomass production measured 30 days after emergence. Plants response to tribenuron methyl  residue was fitted with sigmoidal 3 and 4 parametric equation  fitted to the shoot biomass data as a function of the herbicide residue concentrations and was used to calculate the doses for  \mbox{50\,\%}  inhibition of shoot and root growth (ID50). Results showed, crop emergence, shoot and root growth were affected significantly ($p < 0.01$)  with tribenuron methyl  soil residue. But tribenuron methyl  residue didn't effect ($p < 0.05$) on crop survival.  Highest (\mbox{86.87\,\%}) and lowest (\mbox{26.74\,\%}) shoot dry matter lost were observed in rape and pea respectively. Root biomass production in all crops reduced as increasing tribenuron methyl soil residual concentration as like as shoot biomass. Highest(\mbox{88.41\,\%}) and lowest (\mbox{28.5\,\%}) root dry matter lost were observed in rape and bean respectively. Based on ID50 parameter for shoot, pea (0.0026 mg kg\textsuperscript{-1} soil) and rape(0.000028 mg kg\textsuperscript{-1} soil) appeared to be the most tolerant and susceptible crops to tribenuron methyl soil residue respectively. Other crops as their susceptibility to tribenuron methyl followed the order:  bean$<$ pea$<$tomato$<$ sugar beet $<$corn$<$lentil$<$rape. }

\vspace{0.5cm}
\end{abstract}
\end{center}
\noindent \textbf{Keywords:} Bean, corn, lentil, pea, sugar beet ,rape, tomato, tribenuron methyl
\index[key]{Tribenuron methyl}
\index[key]{Bean}
\index[key]{Corn}
\index[key]{Lentil}
\index[key]{Pea}
\index[key]{Sugar beet ,rape}
\index[key]{Tomato}
\end{document}