نتایج جستجو برای: combine loss

تعداد نتایج: 501913  

ژورنال: علوم آب و خاک 2009
, Kamgar, , Morteza por, , Raoufat,

Oil seed rape is an important non-cereal crop used mainly for edible oil production. Canola pods are fragile and its branches are twisted together at harvesting time. Harvesting with a conventional combine can pull off twisted branches and cause appreciable losses in the vicinity of divider at combine header. In this study, a hydraulic rotary divider was designed and developed to separate twist...

, Kamgar, , Morteza por, , Raoufat,

Oil seed rape is an important non-cereal crop used mainly for edible oil production. Canola pods are fragile and its branches are twisted together at harvesting time. Harvesting with a conventional combine can pull off twisted branches and cause appreciable losses in the vicinity of divider at combine header. In this study, a hydraulic rotary divider was designed and developed to separate twist...

Journal: :تحقیقات مهندسی کشاورزی 0
محمد لشکری دانشجوی دوره دکتری حسین مبلی دانشیار دانشگاه تهران محمود امید دانشیار دانشگاه تهران رضا علیمردانی کارشناس ارشد هوش مصنوعی دانشگاه صنعتی شریف

many factors affect yield loss in wheat harvesting with a grain combine harvester and there is no mathematical model to describe the behavior of this complex system. thus in this study, a fuzzy logic controller (flc) was designed, implemented and tested for the automatic settings of cylinder speed, concave clearance, fan speed and forward speed of a model 955 john deere combine. first, the mech...

Fine grain products are harvested in two manual and mechanized forms. Nowadays, common combine harvesters are used, but fine grain products such as Rapeseed, Sesame and Sorghum cannot be harvested with conventional heads of combine harvesters due to the excessive grain loss in the head of the combine. Therefore, the necessity of design and fabricating machines and heads of combine harvesters be...

Fine grain products are harvested in two manual and mechanized forms. Nowadays, common combine harvesters are used, but fine grain products such as Rapeseed, Sesame and Sorghum cannot be harvested with conventional heads of combine harvesters due to the excessive grain loss in the head of the combine. Therefore, the necessity of design and fabricating machines and heads of combine harvesters be...

Journal: :ماشین های کشاورزی 0
محمدرضا مستوفی سرکاری میر سعید ولیعهدی ایرج رنجبر

grain loss monitors are installed on combine harvester and make it possible to measure grain loss on different parts of the combine. the instrument permits the operator to adjust a proper ground speed to keep grain loss within an acceptable range. in this study a loss monitoring system was implemented to measure grain losses continuously on straw walker and sieves. two grain loss monitors (kee ...

Journal: :تحقیقات مهندسی کشاورزی 0
محمود صفری عضو هیات علمی موسسه تحقیقات فنی و مهندسی کشاورزی محمدرضا علیزاده استادیار موسسه تحقیقات برنج گیلان کریم گرامی محقق موسسه تحقیقات فنی و مهندسی کشاورزی

two types of paddy combine harvester (head-feed and whole-crop) are commonly available in different widths in developed countries. the use of combine harvesters can greatly decrease labor costs and efficiency. combine harvesters have been introduced in several east asian countries (china, japan, south korea) to decrease costs, but their technical and economic performance has not yet been studie...

Journal: :تحقیقات مهندسی کشاورزی 0
نعیم لویمی عضو هیئت علمی بخش تحقیقات فنی و مهندسی مرکز تحقیقات کشاورزی و منابع طبیعی خوزستان عبدالعلی گیلانی عضو هیئت علمی بخش تحقیقات برنج مرکز تحقیقات کشاورزی و منابع طبیعی خوزستان محمدرضا علیزاده عضو هیئت علمی مؤسسه تحقیقات برنج کشور.

multistage and semi-mechanized harvesting of rice in khouzestan province, iran, causes much loss. depending on available facilities and conditions, either spike-tooth or rasp-bar cylinders are employed with either direct or indirect combine harvesting methods. the present research studied the effect of these different harvesting methods on the amount of losses in two rice varieties in 2001-2002...

Journal: :ماشین های کشاورزی 0
محمد هاشم رحمتی غلام عباس سهرابوندی مهدی خدادادی آیت محمد رزداری

rice is a main food for iranian people and has an important role in providing food security. regarding the population growth, increase of rice production and reduction of losses have special importance in prevention of rice import. rice losses in the harvest stage are the highest through the whole production period of this crop and hence the reduction of these losses is necessary. provision of ...

Journal: :مهندسی بیوسیستم ایران 0
محمدمهدی شهاب زاده سعادت کامگار محمدحسین رئوفت

colza (canola) is a crop with high rate of grain loss during harvesting. at harvest, semi-dried grains of canola’s pods are either opened or dropped due to mechanical impacts. therefore, lots of grains drop before entering combine head. another obstacle to successful harvest of canola is that ripe grain's pods are twisted together. this results in heavy grain loss at dividers of combine pi...

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