نتایج جستجو برای: soil dynamics

تعداد نتایج: 612820  

Journal: :Eos, Transactions American Geophysical Union 2012

Journal: :Journal of Applied and Natural Science 2013

Journal: :Soils and Foundations 1966

2017
Stephanie D. Jurburg Inês Nunes James C. Stegen Xavier Le Roux Anders Priemé Søren J. Sørensen Joana Falcão Salles

The response of bacterial communities to environmental change may affect local to global nutrient cycles. However the dynamics of these communities following disturbance are poorly understood, given that they are often evaluated over macro-ecological time scales and end-point measurements. In order to understand the successional trajectory of soil bacterial communities following disturbances an...

2009
Takahiro Sayama Jeffrey J. McDonnell

[1] Hydrograph source components and stream water residence time are fundamental behavioral descriptors of watersheds but, as yet, are poorly represented in most rainfall-runoff models. We present a new time-space accounting scheme (T-SAS) to simulate the pre-event and event water fractions, mean residence time, and spatial source of streamflow at the watershed scale. We use a physically based ...

Journal: :تحقیقات مهندسی کشاورزی 0
حامد نوذری دانشجوی دکتری دانشکده آب و خاک پردیس کشاورزی و منابع طبیعی دانشگاه تهران عبدالمجید لیاقت دانشیار گروه آبیاری و آبادانی دانشکده آب و خاک پردیس کشاورزی و منابع طبیعی دانشگاه تهران مجید خیاط خلقی دانشیار گروه آبیاری و آبادانی دانشکده آب و خاک پردیس کشاورزی و منابع طبیعی دانشگاه تهران عسگر صدیقی کارشناس ارشد مهندسی صنایع مؤسسه پژوهش در مدیریت و برنامه ریزی انرژی

the system dynamics technique is an object-oriented approach that studies and manages complex feedback systems. its merits include the friendly and easy development and improvement of a model. it is also used as a decision tool for engineering problems. in this paper, the system dynamics technique was used to simulate the performance of a subsurface drainage system in an unsteady state. the mod...

Journal: :journal of agricultural science and technology 2010
h. saremi l. w. burgess

environmental factors mainly temperature are believed to determine the distribution and population dynamics of fusarium species in a natural ecosystem. species may be restricted in their distribution by adaptation to specific sets of soil environmental conditions. population dynamics of five fusarium species representative of different climatic conditions were studied at three levels of tem...

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