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\hypersetup{pdftitle={Investigations about Pine Nut"=seed Production of Mexican Pinyon (Pinus Cembroides Zucc.) in North"=eastern Mexico},pdfauthor={Javier Jiménez-Pérez, Oscar Alberto Aguirre Calderon, Eduardo Javier Treviño Garza, Israel Yerena Yamallel, Eduardo Alanis  Rodriguez, Marco Aurelio Gonzalez Tagle, Gerardo Cuellar Rodriguez},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Height growth, Mexican Pinyon, pine nut production, seed harvest},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{Investigations about Pine Nut"=seed Production of Mexican Pinyon (Pinus Cembroides Zucc.) in North"=eastern Mexico\footnote{\textbf{Contact Address:} Javier Jiménez-Pérez, Universidad Autónoma de Nuevo León, School of Forest Sciences, Apartado Postal 41, 67700~Linares, Mexico, \mbox{e-mail}: \email{jjimenez20@gmail.com}}\\[0.8ex]}}
\normalsize{\textsc{Javier Jiménez-Pérez$^{1}$, Oscar Alberto Aguirre Cal\-de\-ron$^{2}$, Eduardo Javier Treviño Garza$^{3}$, Israel Yerena Yamallel$^{4}$, Eduardo Alanis  Rodriguez$^{5}$, Marco Aurelio Gonzalez Tagle$^{6}$, Gerardo Cuellar Rodriguez$^{7}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$Universidad Autónoma de Nuevo León, School of Forest Sciences, Mexico}}}
\item[]{\small{\textit{$^{2}$Universidad Autónoma de Nuevo León, School of Forest Sciences, Mexico}}}
\item[]{\small{\textit{$^{3}$Universidad Autónoma de Nuevo León, Dept. of Silviculture and Forest Management, Mexico}}}
\item[]{\small{\textit{$^{4}$Universidad Autónoma de Nuevo León, Dept. of Silviculture, Mexico}}}
\item[]{\small{\textit{$^{5}$Universidad Autónoma de Nuevo León, Dept. of Silviculture, Mexico}}}
\item[]{\small{\textit{$^{6}$Universidad Autónoma de Nuevo León, Dept. of Silviculture, Mexico}}}
\item[]{\small{\textit{$^{7}$Universidad Autónoma de Nuevo León, Dept. of Forest Entomology, Mexico}}}
\end{itemize*}
\index[author]{Jiménez-Pérez, Javier}
\index[author]{Aguirre Cal\-de\-ron, Oscar Alberto}
\index[author]{Treviño Garza, Eduardo Javier}
\index[author]{Yerena Yamallel, Israel}
\index[author]{Alanis  Rodriguez, Eduardo}
\index[author]{Gonzalez Tagle, Marco Aurelio}
\index[author]{Cuellar Rodriguez, Gerardo}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Pinus cembroides, also known as pinyon pine, Mexican pinyon, Mexican nut pine, is a pine in the pinyon pine group, native to Mexico. It range extends from Arizona, Texas and New Mexico in the United States into Mexico. It typically grows at altitudes between 1,600 and 2,400 metres. The pine nut"=seeds are large and form part of the diet of mexican people. The nut"=seeds are also collected for human consumption, being the most widely used pine nut in Mexico. The principal uses in Mexico are: food and cover for people, wildlife food, habitat and windbreaks







The mexican pinyon occurs widley in northern Mexico. In the dry areas of the two main mexican mountain ranges, the Sierra Madre Occidental and the Sierra Madre Oriental (SMO), these trees grow up to \mbox{15\,m} in height. The edible nut"=seeds from this pine tree are commercially harvested. The centre of the pinyon nuts production lies in the State of Nuevo León in the SMO. The area under investigation stretches over 230 km from the North to South in Nuevo León, Mexico. Its divided into three forest regions considering different climate conditions. The main occurrence of pinyon pine lies on the western slopes of the SMO (forest region II) whereas two more arid regions (I and III) in the North and The South adjoin. The average high growth of pinyon trees in the main occurrence (forest region II) is considerable higher than in the surrounding regions adjacent to the arid zone. Within the three forest regions very large differences in growth among the sample plot were detected. According to a survey carried out by local harvesters pine nut"=seed production was high in the forest region II and poor in the region III during the last 10 years.There is an evident relationship between growth and seed production. 



}

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\noindent \textbf{Keywords:} Height growth, Mexican Pinyon, pine nut production, seed harvest
\index[key]{Height growth}
\index[key]{Mexican Pinyon}
\index[key]{Pine nut production}
\index[key]{Seed!harvest}
\end{document}
