نتایج جستجو برای: yield and biomass per recruit

تعداد نتایج: 16861215  

2014
Robert P. Koester Jeffrey A. Skoneczka Troy R. Cary Brian W. Diers Elizabeth A. Ainsworth

Soybean (Glycine max Merr.) is the world's most widely grown leguminous crop and an important source of protein and oil for food and feed. Soybean yields have increased substantially throughout the past century, with yield gains widely attributed to genetic advances and improved cultivars as well as advances in farming technology and practice. Yet, the physiological mechanisms underlying the hi...

2015
Rodrigo Wiff Ruben H. Roa-Ureta David L. Borchers Andrés C. Milessi Mauricio A. Barrientos Andrea Belgrano

The food consumption to biomass ratio (C) is one of the most important population parameters in ecosystem modelling because its quantifies the interactions between predator and prey. Existing models for estimating C in fish populations are per-recruit cohort models or empirical models, valid only for stationary populations. Moreover, empirical models lack theoretical support. Here we develop a ...

Journal: :تولید گیاهان زراعی 0

lead to continuing effects for increasing extensive of yield by means of advanced agronomic operations and selection of high yielding resistant genotypes. there fore, due to evaluation and determination of best effective traits in improvement of yield and grain quality of local populations of winter wheat, an experiment was carried out in uremia agricultural research station, on 30 local popula...

Journal: :پژوهش های زراعی ایران 0
طیبه نژادحسینی علیرضا آستارایی رضا خراسانی حجت امامی

a field study was conducted in qaen region using complete randomized blocks with three replications to study the effect of organic manure, zinc and boron on yield and yield components of millet and grain chemical composition. the treatments included factorial arrangement of municipal solid waste compost and cow manure (each at 25 ton ha-1), zn (0, 50 kg ha-1) and b (0, 10 kg ha-1) by using thei...

Journal: :به زراعی کشاورزی 0
الهام رستگاری دانشجوی کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه ولی عصر رفسنجان، رفسنجان، ایران شهاب مداح حسینی استادیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه ولی عصر رفسنجان، رفسنجان، ایران آرمان آذری استادیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه ولی عصر رفسنجان، رفسنجان، ایران

at the research farm of vali-e-asr university of rafsanjan in 2013. the experiment was arranged in a randomized complete block design with four replications and four irrigation intervals. irrigation was done after 40 (control), 60, 80 and 100 mm evaporation from pan class a, from seedling establishment till physiological maturity. results showed that irrigation level did not significantly chang...

Journal: :تولید گیاهان زراعی 0
عباس فروغی دانشجوی کارشناسی ارشد گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان جاوید قرخلو استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان فرشید قادری فر استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان

abstract in order to investigate the effect of crop row spacing and cocklebur (xanthium strumarium) densities on yield and its components of two sesame cultivars, a field experiment was conducted in 2009-2010 growing season at research farm of university of agricultural sciences and natural resources of gorgan, iran. the experiment was established as factorial arrangement using a randomized com...

Journal: :پژوهش های حبوبات ایران 0
احمد نظامی عبدالرضا باقری مرتضی عظیم زاده علی اکبر محمودی علی بزرگمهر

long term use of fallow in wheat-based cropping system of dry and semi-dry lands can increase erosion and decrease soil fertility. legumes as substituting crops for fallow could improve sustainability in this area. this study was conducted to evaluate the substituting of some legumes for fallow in a 2-yr wheat rotation at research stations in north khorasan province (natural resources research ...

Journal: :زراعت دیم ایران 0
مهری صفاری دانشکده کشاورزی، دانشگاه شهید با هنر کرمان محمد مددی زاده دانشکده کشاورزی، دانشگاه شهید با هنر کرمان

in order to study the effects of nitrogen and complementary irrigation on yield and its components of rainfed barley sahand cultivar, an experiment was conducted on split plot based on randomized completely block design with four replication in baft area at 2009-2010. factors were: four levels of nitrogen (0, 20, 40 and 60 kg/ha as pure nitrogen) from urea source as factor b and four levels of ...

Journal: :بوم شناسی کشاورزی 0
مشیر الحق عابدی محمد جواد ثقه الاسلامی سید غلامرضا موسوی

in order to study the effect of irrigation and nitrogen fertilizer levels on yield of basil, an experiment was conducted as split plot based on randomized complete block design with three replications in birjand (moud region) in 2010. main plot factor was two irrigation levels (7 and 14 days interval) and nitrogen fertilizer (as urea) was considered as sub plot factor in four levels (0, 50, 100...

Mahnaz Shirkhodaei Mohammad Taghi Darzi, Mohammadreza Haj Seyed Hadi

The main objective of this study was to determine the influence of vermicompost and biostimulant on the growth and biomass in the coriander plant height, wet weight of plant ,dry weight of plant and biomass yield. The experiment was carried out as factorial experiment in the base of randomized complete blocks design with eight treatments and three replications at research field of Agriculture C...

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