Measuring Losses of Wheat Harvester Units at Different Speeds and Cutting Heights

Abdulla, Zhyar Burhan; Mohammed, Saefaddin Hassan; Youns, Abdulla Fathi; Isaak, Momtaz

doi:10.58928/ku25.16426

	Measuring Losses of Wheat Harvester Units at Different Speeds and Cutting Heights
Kirkuk University Journal for Agricultural Sciences (KUJAS)
Volume 16, Issue 4, December 2025, Pages 240-248 PDF (504.7 K)
Document Type: Research Paper
DOI: 10.58928/ku25.16426
Authors
Zhyar Burhan Abdulla^* ¹; Saefaddin Hassan Mohammed²; Abdulla Fathi Youns³; Momtaz Isaak⁴
¹University pf Sulaimani
²Field Crops and Medicinal Plant Department/College of Agricultural Engineering Sciences/ Salahaddin University/Erbil/Iraq
³Department Of Flied crop & Medicinal plant, College of Agricultural Engineering Sciences , University of Salahaddin , IRAQ.
⁴Agricultural Machines and Equipment, Collage of Agriculture , University of tikret, Iraq
Abstract
Factorial experiment used (RCBD) with three replication conducted in the wheat field in the Qoritan region of Erbil State, Kurdistan, Iraq, for the study the effect of cutting, threshing, separation and cleaning units, also measuring the total losses and combine performance efficiency under two speed 2.5 and 3.5 km.h-1 and two higher cutting 10, 20 cm. combine speed 2.5 km.h-1 lower losses in threshing, separation, cleaning units and total loss. While cutting unit and efficiency were higher. Increasing higher cutting gave losses 3.60%, 2.99%, 0.24% for cutting, threshing, separation and cleaning, respectively. total losses was 6.83% while combine efficiency was reduced with speed. Increasing higher cutting from 10cm to 20cm causes increase threshing unit loss 2.25% to 3.72% , and separation unit loss 0.20% to 0.35%. more than, increasing the total losses from 6.32% to 7.42% while the rest of parameters study were reducing. . نفذت تجربة عاملية واستخدم تصميم القطاعات العشوائية الكاملة وبثلاث مكررات في حقل قمح في منطقة (قوريتان) في مدينة اربيل– كردستان العراق، لغرض دراسة حساب خسائر وحدات حاصدة القمح متمثلة بودات القطع والدياسة والفصل والتنظيف وكذلك حساب الخسائر الكلية وكفاءة الآداء تحت تأثير سرعتين 2.5 و3.5 كم. ساعة-1 و أرتفاعين للقطع 10 و20 سم. سجلت سرعة 2.5 كم . ساعة-1 أقل معدل للخسائر في وحدات الدياسة والفصل والتنظيف والحسائر الكلية، بينما وحدة القطع وكفاءة الاداء كانتا عالية. زيادة أرتفاع القطع من 10 الى 20 سم أعطى معدل خسائر3.60 % و2.99 % و0.24 % لكل من وحدة القطع والدياسة والفصل والتنظيف على التوالي. الخسائر الكلية للحاصدة 6.83 % وكفاءة الاداء أنخفضت مع انخفاض سرعة الحاصدة. زيادة ارتفاع القطع من 10 الى 20 سم ادى الى زيادة خسائر وحدة الدياسة من2.25 % الى 3.72 %، وخسائر وحدة الفصل من 0.20 % الى0.35 %، أضافة الى ذلك زيادة الخسائر الكلية من6.32 % الى7.42 % بينما بقية الصفات المدروسة أنخفضت.
Keywords
Combine; Reel; Wheat; threshing; Cleaning; losses

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