على التوالي وثلاثة سرع امامیة ٥.٧٧ و ٧.١٨ و ٩.٠٤ كم/
العملیة وعدد الكتل التي یزید قطرھا عن ٥سم/ م ٢
من ق درة ا لس حب وع ر ض الاثارة و
القرص وجمیع المؤشرات المدروسة ، وكان للتداخل بین زاویة القرص
الملخص الانجليزي
The experiment was carried out at fields of college of agriculture and forestry,
university of Mosul to study the effect of two disk angles for the offset disk harrow
15°, 20° and 20°, 25° for the front and rear gang respectively , and three forward
speeds 5.77 , 7.18 and 9.04 Km/hr on pulling force , drawbar power , slippage
percentage , cutting depth , cutting width , coefficient of cutting width , effective field
capacity and number of soil aggregates larger than 5 cm/m2. Results showed that the
effect of disk angle was significant in drawbar power , cutting width and coefficient of
cutting width while there were no significant differences concerning other studied
characteristics , there was extrusive relation between the disk angle and all studied
characteristics. The effect of interaction between disk angle and forward speeds was
significant in cutting depth while there were no significant differences concerning other
studied characteristics.
مثنى عبد المالك نوري الجراح | Mothana Abed AlMalik Noori Al jarrah | 7031