نتایج جستجو برای: tillage 2365 kg ha

تعداد نتایج: 244611  

Journal: :Journal of environmental quality 2010
Hadar Heller Asher Bar-Tal Guy Tamir Paul Bloom Rodney T Venterea Dong Chen Yi Zhang C Edward Clapp Pinchas Fine

The use of organic residues as soil additives is increasing, but, depending on their composition and application methods, these organic amendments can stimulate the emissions of CO(2) and N(2)O. The objective of this study was to quantify the effects of management practices in irrigated sweet corn (Zea mays L.) on CO(2) and N(2)O emissions and to relate emissions to environmental factors. In a ...

Journal: :آب و خاک 0
مریم سادات حسینی غلامحسین حق نیا امیر لکزیان حجت امامی

soil enzyme activities can be used as indicators of soil quality for assessing the sustainability of agricultural ecosystems. the objective of this study was to determine the effects of barley residue input rate, burning, urea fertilizer and tillage management on activities of alkaline phosphatase and urease under field conditions, after a period of 90 days. the experiment was carried out based...

Journal: :Journal of environmental quality 2008
T Roberson K C Reddy S S Reddy E Z Nyakatawa R L Raper D W Reeves J Lemunyon

Increased CO2 release from soils resulting from agricultural practices such as tillage has generated concerns about contributions to global warming. Maintaining current levels of soil C and/or sequestering additional C in soils are important mechanisms to reduce CO2 in the atmosphere through production agriculture. We conducted a study in northern Alabama from 2003 to 2006 to measure CO2 efflux...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1388

این آزمایش جهت بررسی اثرات کودهای تلفیقی (کود گاوی و کود نیتروژنه) و کود آهن بر روی عملکرد کمی و کیفی آفتابگردان آذرگل در مزرعه تحقیقاتی دانشگاه شهید باهنر کرمان در یک خاک آهکی به اجرا در آمد. این بررسی بصورت اسپلیت پلات در قالب طرح بلوک های کامل تصادفی و در 3 تکرار پیاده گردید. تیمارهای آزمایشی شامل کرت اصلی ( t/ha 14 کود گاوی + kg/ha 217 کود اوره) = t1 ، ( t/ha 12 کود گاوی + kg/ha 261 کود اور...

2017
Hizumi L. S. Seó Luiz C. P. Machado Filho Daniel Brugnara

A significant share of Greenhouse Gases (GHG) produced from agriculture comes from cattle farming. The reduction in GHG emissions from ruminants fed with grains has led some researchers to recommend such a diet as a means of mitigating emissions in the sector. A more accurate balance of emissions, however, must include the carbon (C) stocked by feed crops. Within the grain production system, no...

2002
E. B. Schwab D. W. Reeves C. H. Burmester R. L. Raper

ern Tennessee (Stevens et al., 1992; Bradley, 1993; Triplett et al., 1996), conservation tillage practiced on silty clay Yield reductions from no-tillage cotton (Gossypium hirsutum L.) soils in northern Alabama resulted in 8 to 15% yield jeopardized adoption of conservation systems in the Tennessee Valley region of north Alabama in the early 1990s. We conducted a study from reductions compared ...

Journal: :تحقیقات مهندسی کشاورزی 0
رضا رحیم زاده عضو هیئت علمی مؤسسه تحقیقات کشاورزی دیم احمد شریفی مالواجردی استادیار پژوهش مؤسسه تحقیقات فنی و مهندسی کشاورزی کرج ارژنگ جوادی دانشیار پژوهش مؤسسه تحقیقات فنی و مهندسی کشاورزی کرج

applying a suitable tillage method is vital to chickpea production in dryland conditions. hence, eight tillage methods were studied using strip plots in a randomized complete block design with three replications over three years at the dryland agricultural research institute in maragheh, iran. the amount of rainfall in the three years of the study were 202, 264 and 203 mm, respectively, which w...

Journal: :Indian Journal of Agronomy 2023

An experiment was conducted during 2020–21 at the Rani Lakshmi Bai Central Agricultural University, Jhansi, Uttar Pradesh to study effect of tillage, rice (Oryza sativa L.) residue, weed control and N fertilizer levels on weeds, growth yield wheat (Triticum aestivum L.). Weed infestation in zero-tillage (ZT) significantly lower (16.7–27.6%), more so when rice-residue retained soil surface compa...

2002
Ardell D. Halvorson Gary A. Peterson Curtis A. Reule

CT crop–fallow system in the central Great Plains (Shanahan et al., 1988; Halvorson, 1990; Peterson et al., Winter wheat (Triticum aestivum L.)–fallow (WF) using conven1993; Halvorson and Reule, 1994; Farahani et al., 1998). tional stubble mulch tillage (CT) is the predominant production practice in the central Great Plains and has resulted in high erosion potential Winter wheat yields in a WCF...

2015
Li-fang Wang Zhou-ping Shangguan

Mulching and tillage are widely considered to be major practices for improving soil and water conservation where water is scarce. This paper studied the effects of FM (flat mulching), RFM (ridge-furrow mulching), SM (straw mulching), MTMC (mulching with two materials combined), MOM (mulching with other materials), NT (no-tillage) ST (subsoiling tillage) and RT (rotational tillage) on wheat yiel...

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