نتایج جستجو برای: linear density

تعداد نتایج: 868158  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

2008
Elizabeth M. Gardner Darek A. Kedra Paul M. Donaldson Rui Guo Sarah A. Butcher

In the last four decades, human fertility has declined across the globe, a trend that policy experts predict will continue. As a result, international migration will increasingly affect the demographic future of many nations. Joel Cohen et al. devised a generalized linear model to predict the yearly number of regional and international migrants. The model includes projected demographic variable...

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