نتایج جستجو برای: ecological systems indefinite weight grazing and constant yield harvesting sub supersolution method

تعداد نتایج: 17299149  

Journal: :کشاورزی (منتشر نمی شود) 0
علی اکبر محمودی هیأت علمی مرکز تحقیقات کشاورزی دیم شمال خراسان، خراسان شمالی ‏ الیاس نیستانی هیأت علمی مرکز تحقیقات کشاورزی دیم شمال خراسان، خراسان شمالی ‏

this study was conducted during 2003-2004 and 2004-2005 growing seasons at shirvan ‎agricultural research station, to evaluate the performance of eight winter chickpea seed lines. ‎the experiment conducted in randomized complete block design with four replications. during ‎the growing season, date of flowering, plant height, number of pod per plant, number of seed ‎per pod and date of maturity ...

Ijaz Rasool Noorka Saeed Rouf Shabir A Shahid

Principal component analysis is a valid method used for data compression and information extraction in a given set of experiments. It is a well-known classical data analysis technique. There are a number of algorithms for solving the problems, some scaling better than others. Wheat ranks as the staple food of most of the nations as well as an agent of poverty reduction, food security and world ...

Journal: :Global change biology 2012
Vivienne R Johnson Bayden D Russell Katharina E Fabricius Colin Brownlee Jason M Hall-Spencer

Predicting the impacts of ocean acidification on coastal ecosystems requires an understanding of the effects on macroalgae and their grazers, as these underpin the ecology of rocky shores. Whilst calcified coralline algae (Rhodophyta) appear to be especially vulnerable to ocean acidification, there is a lack of information concerning calcified brown algae (Phaeophyta), which are not obligate ca...

Journal: :Animal : an international journal of animal bioscience 2009
T W J Keady J P Hanrahan

The effects of (i) herbage allowance, (ii) frequency of allocation and (iii) grass silage feed value on ewe and lamb performance were studied in mid-gestation ewes. Furthermore, the effects of (i) herbage allowance, (ii) frequency of allocation and (iii) grazing date and their interactions on subsequent herbage yield and feed value were also evaluated. Swards, which had a cut of silage removed ...

Journal: :تحقیقات آب و خاک ایران 0
آرش فرزام صفت مسعود پارسی نژاد محمدرضا یزدانی جعفر شریعتمداری حمیده نوری سیدفرهاد موسوی فرید اجلالی

¬¬¬one of the most important limitations for selection of second crop in paddy fields in guilan is waterlogging in the second half of the year. for an evaluation of waterlogging effect (in adequate drainage) on canola yield, a lysimeter study was conducted implementing -10,-5,0 and +5 cm water level for 2,5,7 and 10 day durations at 3 plant growing stages namely: emergence, beginning of floweri...

Journal: :Communications of the Korean Mathematical Society 2004

Ground state geometries have been computed using Density Functional Theory (DFT) at B3LYP/6-31G(d,p) level of theory. The excitation energies and spectroscopic parameters have been computed using Long range Corrected (LC) hybrid functional by Time Dependent Density Functional Theory (TDDFT) with LC-BLYP level of theory. The Polarizable Continuum Model (PC...

امام, یحیی, مقصودی , کبری, مقیمی, نغمه,

In order to evaluate the effect of water stress and nitrogen levels on yield and some agronomic traits of two forage sorghum cultivars, a field experiment was conducted at the Faculty of Agriculture, Shiraz University, during Spring and Summer 2011. The experiment carried out as split-split plot based on randomized complete block design, with 3 replications. Water stress levels of 100, 75 and 5...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده کشاورزی 1394

with the increasing population and the need for more food, as well as with the development of science and technology, human approach to unnatural and often chemical inputs to increase agricultural production has been a great expansion and problems such as increased cancers, chronic diseases has created environmental pollution. implementation of organic organic is a solution to these problems . ...

Journal: :بوم شناسی کشاورزی 0
شیوا اکبری محمد کافی شهرام رضوان بیدختی

introduction drought stress reduces plant growth by affecting various physiological and biochemical processes, such as photosynthesis, respiration, translocation, ion uptake, carbohydrates, nutrient metabolism and growth promoters. garlic (allium sativum l.) is an annual bulb crop that has been cultivated since ancient times and was used as a spice and condiment for many centuries. garlic is an...

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