نتایج جستجو برای: conventional tillage no tillage

تعداد نتایج: 3481093  

2004
D. W. Reeves

Maintenance and improvement of soil quality in continuous cropping systems is critical to sustaining agricultural productivity and environmental quality for future generations. This review focuses on lessons learned from long-term continuous cropping experiments. Soil organic carbon (SOC) is the most often reported attribute from long-term studies and is chosen as the most important indicator o...

2005
Mahdi M. Al-Kaisi Xinhua Yin Mark A. Licht

Soil organic C (SOC) and total N (TN) contents play a crucial role in sustaining agricultural production systems. Short-term ( 10-year) management effects on SOC and TN dynamics are often complex and variable. Three experiments were conducted to evaluate short-term tillage and cropping system effects on SOC and TN within the 0–30 cm soil depth across Iowa. The first experiment with no-tillage a...

Journal: :مهندسی زراعی 0
فریده یاراحمدی دانش آموخته کارشناسی ارشد گروه خاکشناسی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز احمد لندی دانشیار گروه خاکشناسی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز محمد امین آسودار دانشیار گروه ماشینهای کشاورزی، دانشکده کهندسی زراعی، دانشگاه کشاورزی و منابع طبیعی رامین اهواز عادل مرادی سبزکوهی مربی، دانشکده مهندسی زراعی، دانشگاه کشاورزی و منابع طبیعی رامین اهواز

increasing the concentrations and emissions of greenhouse gases makes the weather warmer and affects land uses. carbon dioxide emission is recognized as one of the most important factors in global warming. the objectives of this research were to investigate the amount of co2 emission from soil to atmosphere during the wheat growth under two different tillage and irrigation methods. in this stud...

2004
Mahdi M. Al-Kaisi Xinhua Yin

The adoption of no tillage (NT) in crop production has been encouraged primarily due to its more significant benefits to the environment compared with other conservation tillage systems. There are nevertheless concerns about NT corn (Zea mays L.) performance from both shortand long-term perspectives. This study was conducted near Burlington, Nashua, Newell, Sutherland, and Crawfordsville in Iow...

2004
Jeffrey A. Vetsch

could be optimized using modified NT systems (including ST) and starter fertilizer. In Iowa Mallarino et al. (1999) Utilizing conservation tillage practices and increasing fertilizer N found that ST frequently increased early growth but seluse efficiency for corn (Zea mays L.) are necessary for optimizing dom increased corn grain yields compared with NT. growers’ profits and for minimizing loss...

2007
Stephen Machado Steve Petrie Annie Qu

Conventional tillage winter wheat (Triticum aestivum) (WW)–summer fallow reduces soil productivity and increases soil erosion. Conservation tillage management, together with intensive cropping may have the potential to reverse these sustainability concerns. The objective of this study was to determine the effects of conventional tillage (CT) and no-tillage (NT) systems on grain yield of long-te...

Journal: :تحقیقات مهندسی کشاورزی 0
محمد خرمیان دانشجوی دوره دکتری دانشگاه شهید چمران اهواز و عضو هیئت علمی بخش تحقیقات فنی و مهندسی، دزفول، مرکز تحقیقات کشاورزی و منابع طبیعی صفی آباد سعید برومند نسب استاد دانشگاه شهید چمران، اهواز، دانشکده مهندسی آب فریبرز عباسی دانشیار پژوهش مؤسسه تحقیقات فنی و مهندسی کشاورزی سیدرضا اشرفی زاده استادیار پژوهش بخش تحقیقات فنی و مهندسی، دزفول، مرکز تحقیقات کشاورزی و منابع طبیعی صفی آباد

irrigation management, soil tillage method and fertilizer management play important roles in increasing crop yield and water and solute movement in the soil profile. the present research was conducted to study the effects of a no-tillage system and nitrogen fertilizer on the mineral nitrogen movement and soil moisture under optimum irrigation conditions. the study was conducted at safiabad agri...

1999
P. R. Gajri K. S. Gill Rachhpal Singh B. S. Gill

In rice (Oryza sativa L.) culture the effect of puddling (wet tillage) on puddle quality, weed growth and yield of crop depends upon initial soil manipulations by pre-puddling tillage. However, the role of pre-puddling tillage on these aspects has not been studied adequately. These effects were studied for three years (1994±1996) in a ®eld experiment with a rice±wheat (Triticum aestivum L.) cro...

2016
Li-Jin Guo Shan Lin Tian-Qi Liu Cou-Gui Cao Cheng-Fang Li Wenju Liang

Investigating microbial metabolic characteristics and soil organic carbon (SOC) within aggregates and their relationships under conservation tillage may be useful in revealing the mechanism of SOC sequestration in conservation tillage systems. However, limited studies have been conducted to investigate the relationship between SOC and microbial metabolic characteristics within aggregate fractio...

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