نتایج جستجو برای: transects were done

تعداد نتایج: 3598746  

Journal: :مهندسی زراعی 0
حمیدرضا متین فر استادیار گروه خاکشناسی دانشکده کشاورزی دانشگاه لرستان منوچهر کلهر کارشناس ارشد مرکز تحقیقات کشاورزی و منابع طبیعی استان لرستان افشین شعبانی دانشجوی کارشناسی ارشد سنجش از دور و سیستم اطلاعات جغرافیایی دانشگاه تهران صالح آرخی استادیار گروه جغرافیا، دانشگاه گلستان

the rate of soil erosion and sediment yield estimation in the catchment areas is considered as an important factor for soil and water conservation practices. due to difficulties and restrictions in common soil erosion methods, applying a high accuracy method with lowest cost and time consuming would be necessary. assessment of soil loss in hilly areas with capacity of rang land that has changed...

2014
Grażyna Łaska Aneta Sienkiewicz

Variability of green biomass quantity in plant communities found in study transects established along selected traffic routes in Białystok was studied. The study was conducted in a total of four transects including three in non-forest plant communities and one in a forest community located in the vicinity of Białystok’s main outbound roads. The effect of different distance of the study fields f...

Journal: :Journal of Range Management 1971

2003
Roger L. Bilisoly Sean A. McKenna

Previous work on sample design has been focused on constructing designs for samples taken at point locations. Significantly less work has been done on sample design for data collected along transects. A review of approaches to point and transect sampling design shows that transects can be considered as a sequential set of point samples. Any two sampling designs can be compared through using eac...

2001
Patrice Cadet Alain Albrecht

The relationships between the structural variations of a fenisol and the plant parasitic nematode communities of sugarcane were studied along three transects. These transects, about 20 m long, started in horizon A and ended in a levelled area where horizon C began. Results were analysed with the Co-inertia analysis method, which allowed us to study simultaneously the soil and nematode data. Pro...

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...

Considering the current state of the Zagros forests and the necessity of using information related to quantitative characteristics in the management of these forests, it is essential to prepare more accurate information so that the control of this area can be done more accurately. One of the ways to obtain statistical information is linear sampling (transect.( In this regard, the present study ...

2007
A. C. De Vries W. P. Kustas

Aerodynamic roughness length 0 ) and displacement height 0 ) are important surface parameters for estimating surface fluxes in numerical models. These parameters are generally determined from wind flow characteristics using logarithmic wind profiles measured at a meteorological tower or by balloon release. It would be an advantage to use measurements of land surface characteristics instead of w...

2017
Elizabeth A. Forys Craig R. Allen Daniel P. Wojcik

We examined the influence of both the proximity and extent of human developments and paved roads on the presence of the predatory, non-indigenous, red imported fire ant (Solenopsis invicta). This species was inadvertently introduced into the United States at the port of Mobile, Alabama, around 1930 and rapidly spread to many southeastern states, including Florida. More recently, S. invicta colo...

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