نتایج جستجو برای: plant production

تعداد نتایج: 956198  

Journal: :Journal of theoretical biology 2007
Norio Yamamura Noboru Fujita Motoyuki Hayashi Yusuke Nakamura Atsushi Yamauchi

Plants show phenological responses to herbivory. Some enclosure experiments have demonstrated that the onset of the peak flowering season is dependent on grazing pressure. We constructed a mathematical model using Pontryargin's maximum principle to investigate changes in flowering time by examining shifts in resource allocation from vegetative to reproductive plant components. We represented a ...

Journal: :Annals of agricultural and environmental medicine : AAEM 2007
Boris Fumanal Bruno Chauvel François Bretagnolle

Common ragweed (Ambrosia artemisiifolia L.) is an invasive weed of field crops and human-disturbed habitats in Europe. As well as in its natural range (North America), common ragweed is a threat to human health due to its abundant allergenic pollen release. Most studies have been focused on airborne pollen monitoring, but to date, no data have been available on precise individual plant pollen a...

Journal: :Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 2010

Journal: :Geology, Ecology, and Landscapes 2017

Journal: :Eastern-European Journal of Enterprise Technologies 2013

Journal: :Philosophical Transactions of the Royal Society B: Biological Sciences 2010

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