Elsheikha, A. M. <br/><br/>
Effect of coating chisel plow shares with some materials on draft force requirement  [electronic resources] 
 تأثير تغطية اسلحة المحاريث الحفارة ببعض المواد على قوة الشد المطلوبة 

 - 611 - 614 p. 
<br/><br/>Includes references. 
<br/><br/> This study was devoted to verifying the effect of using three different coating materials on the draft requirement of chisel plow shares. Four types of chisel plow shares with the same geometric dimensions of (70 mm width, 0.26 rad as lift angle and 45° for cutting angel) were used. One chisel plow share was kept without coating with its standard iron as a control, the other three chisel plow shares were coated with copper, aluminum and stainless steel. Experiments were conducted using an open air soilbin with a digital electronic dynamometer attached to Kobota tractor of 26 KW to measure the required draft of each chisel plow share in term of the horizontal force values. Measurements of the required draft for all chisel plow shares were assessed at three different depths 15, 20 and 25 cm, and three different forward speeds of 0.58, 0.75 and 1 m/s (2.1, 2.7 and 3.6 km/h) with three replications using a completely randomized design in silty clay loam soil. The results revealed that the stainless steel-coated share has the lowest horizontal force in all depths and almost at all forward speeds. Therefore, it is recommended to coat shares with stainless steel due to its low price due to the low price of stainless steel locally and internationally and because of the lower horizontal force required to use it with maintain low levels of shares corrosion.<br/>Keywords: tillage tools, coating materials, shares protection, draft force. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tillage--Equipment and supplies<br/>Agricultural machinery--Hydraulic equipment