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\hypersetup{pdftitle={Lime Particle Size Affects Soil Acidity and Wheat Biological Yield in Acrisols of Ethiopia},pdfauthor={Sitot Tesfaye, Yihenew Gebresilassie, Fikiru Mekonnen, Getinet Desalegn, Asmare  Dejen},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Acrisols, Ethiopia, lime, particle size, soil acidity, wheat, yield},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 18-21, 2016, Vienna, Austria}}\\[1ex] \Large{``Solidarity in a competing world ---\\fair use of resources''\\[2ex]}}
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\Large{\textbf{Lime Particle Size Affects Soil Acidity and Wheat Biological Yield in Acrisols of Ethiopia\footnote{\textbf{Contact Address:} Getinet Desalegn, University of Natural Resources and Life Sciences (BOKU), Department of Crop Sciences, Konrad Lorenz Straße 24, A-3430~Tulln , Austria, \mbox{e-mail}: \email{getinet.desalegn@boku.ac.at}}\\[0.8ex]}}
\normalsize{\textsc{Sitot Tesfaye$^{1}$, Yihenew Gebresilassie$^{2}$, Fikiru Mekonnen$^{3}$, Getinet Desalegn$^{4}$, Asmare  Dejen$^{5}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$Wollo University, Department of Soil and Water Resources Management, }}}
\item[]{\small{\textit{$^{2}$Bahirdar University, Dept. of Natural Resource, Ethiopia}}}
\item[]{\small{\textit{$^{3}$Wollo University, Department of Plant Science, }}}
\item[]{\small{\textit{$^{4}$University of Natural Resources and Life Sciences (BOKU), Department of Crop Sciences, Austria}}}
\item[]{\small{\textit{$^{5}$Wollo University, Dept. of Plant Science, Ethiopia}}}
\end{itemize*}
\index[author]{Tesfaye, Sitot}
\index[author]{Gebresilassie, Yihenew}
\index[author]{Mekonnen, Fikiru}
\index[author]{Desalegn, Getinet}
\index[author]{Dejen, Asmare }
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Incubation and pot experiments with total observation of 186 were conducted to study the effects of lime particle size and rate on soil acidity and response of bread wheat (\textit{Triticum aestivum}) to liming in Acrisols of Ethiopia. Three lime particle size fractions (25, 50 and 100 mesh size) and eleven rates, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 t ha$^{-1}$ and no lime treatments were used. Treatments were arranged in a randomised complete block design (RCBD) with three replications. Similar treatments and designs were used for the pot experiment and \textit{T.~aestivum} was planted one month after incubation of soil"=lime mixture. During the 90 days of incubation period, soil pH changes were analysed every 30 days. Besides, exchangeable bases, total N, available P, CEC and exchangeable acidity were analysed initially and after 90 days of incubation period. With lime rate, soil chemical properties (pH, PBS, TEB, CEC, P and Ca) showed positive correlations, whereas exchangeable acidity and PAS had negative correlations. Total N and OM were not affected by liming. The finer the particle size of the lime and the higher its rate resulted in higher pH and the lower the exchangeable acidity and acid saturation. In other words, lime particle size with 100 and 50 mesh sizes were more effective than 25 mesh size in reducing exchangeable acidity and increasing soil pH. All lime rates showed significant differences from the control in the biological yields of wheat. And all biological yields of wheat consistently increased with an increase in lime rate until 8 t ha$^{-1}$ for 25 mesh size and 6 t ha$^{-1}$ for 50 and 100 mesh size, but no statistically significant differences were found above 5 t ha$^{-1}$ lime applications. Hence, although the highest biological yields were attained at lime rates of 8 t ha$^{-1}$ (for 25 mesh size) and 6 t ha$^{-1}$ (for 50 and 100 mesh sizes), application of lime above 5 t ha$^{-1}$ is not recommended from the perspective of yields.}

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\noindent \textbf{Keywords:} Acrisols, Ethiopia, lime, particle size, soil acidity, wheat, yield
\index[key]{Acrisols}
\index[key]{Ethiopia}
\index[key]{Lime}
\index[key]{Particle size}
\index[key]{Soil!acidity}
\index[key]{Wheat}
\index[key]{Yield}
\end{document}
