نتایج جستجو برای: 1) and reduced tillage (2373 kg ha

تعداد نتایج: 17280803  

Journal: :علوم گیاهان زراعی ایران 0
حمیدرضا چقازردی دانشجوی دکتری رشتة اکولوژی گیاهان زراعی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج محدرضا جهانسوز استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج علی احمدی استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج منوچهر گرجی دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

to study the effects of different tillage systems on yield and some characteristic of wheat and also some soil properties in wheat dry land area, six experiments were performed in cold, moderate and semi-warm climatic conditions of kermanshah province in west of iran, in a randomized complete block design with five replications. experimental treatments were consisted of no-tillage, reduced till...

2014
Gebreyesus Brhane Tesfahunegn

The low average grain yield (0.7 ton ha(-1)) of tef in Ethiopia is mainly attributed to low soil fertility, and inappropriate tillage and weeds control practices. Despite this, limited scientific information has been documented so far on their interaction effects on tef crop productivity in northern Ethiopia. The objective of this study was to assess the separate and interaction effects of till...

Eskandari, Ali, Hadidi Masouleh, Esmaeil, Sayfzadeh, Saeed, Soufizadeh, Saeed, Taherianfar, Amin,

Tillage methods are among the most successful factors in agriculture that have a significant impact on the quality and quantity of agronomic plants. To evaluate different tillage methods and urea fertilizer with nitrapyrin on total chlorophyll content, grain protein, yield, and yield components of two barley (Hordeum vulgare L.) cultivars, an experiment was conducted as split factorial in the r...

Journal: :مهندسی بیوسیستم ایران 0
احمد حیدری عضو هیات علمی مرکز تحقیقات کشاورزی و منابع طبیعی همدان

dryland winter wheat (triticum sativum l.) generally grown in rotation with fallow or chickpea (cicer arietinum l.) constitutes a major crop in the west region of iran. information is limited on the success of more intensive dryland cropping systems while applying conservation tillage management. an experiment was conducted to determine the effect of five tillage systems on soil physical proper...

2014
Shahzad Ali Amanullah Jan Jia Zhikuan Shakeel Ahmad Muhammad Kamran

Despite the importance of sesame (Sesamum indicum L.) in the world, this crop has received least research attention in Pakistan. Therefore, a field experiment was carried out to evaluate the performance of tillage system under various irrigation intervals and phosphorus levels on oil contents, yield and yield attributes of Sesame. The experiment was conducted at New Developmental Farm of the Un...

Journal: :مجله پژوهش های اکوفیزیولوژی گیاهان زراعی 0

abstract in order to assess the environmental impact of agricultural activity, the long-term sustainability should be considered. in order to achieve solutions to reduce energy consumption and carbon emissions in the production of rainfed sunflower, this assessment was conducted in the north east of iran. four production methods, i.e. conventional tillage (ct), tow reduced tillages (rt1and rt2)...

2015
Xiujuan Ren Yanan Cheng Dafu Wu Chunhu Wang Shilin Chen

A field experiment with six treatments was conducted to study the nitrogen reserves in summer maize topsoil on the north China plain. Results showed that topdressing significantly increased topsoil nitrogen reserves. Summer corn topsoil nitrogen reserves were affected by several management measures. Shallow tillage, wheat straw no-returning and deep intertillage at the corn seedling stage signi...

Journal: :Journal of environmental quality 2009
L Jason Krutz Martin A Locke R Wade Steinriede

The need to control glyphosate [N-(phosphonomethyl)glycine]-resistant weed biotypes with tillage and preemergence herbicides in glyphosate-resistant crops (GRCs) is causing a reduction in no-tillage hectarage thereby threatening the advances made in water quality over the past decade. Consequently, if environmental gains afforded by GRCs are to be maintained, then an in-field best management pr...

Journal: :پژوهش های کاربردی زراعی (زراعت سابق) 0
جلال زکیئی کارشناس ارشد مکانیزاسیون دانشگاه کشاورزی و منایع طبیعی رامین محمدامین آسودار دانشیار، گروه ماشین های کشاورزی، دانشگاه کشاورزی و منابع طبیعی رامین- اهواز مرتضی الماسی استاد، گروه ماشین های کشاورزی، دانشکده کشاورزی دانشگاه چمران اهواز

the erosion in dryland caused decrease in yield and soil quality, especially in slope land with conventional tillage. to investigate effect of tillage and planting methods in slope land on erosion and yield of dryland wheat, an experiment was conducted in 2007 at kermanshah province. the statistical design for this research was strip split plots in rcb (randomized complete blocks) with three re...

2004
M. A. Liebig

The extreme climate of the northern Great Plains of North America requires cropping systems to possess a resilient soil resource in order to be sustainable. This paper summarizes the interactive effects of tillage, crop sequence, and cropping intensity on soil quality indicators for two long-term cropping system experiments in the northern Great Plains. The experiments, located in central North...

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