Show extremely sharp plows 11 ao N Not bt Materially y it faster tests con conducted d ted at i the iol lowa V i a t 8 state ta it C colleges colle gei indicate that extreme sharpness of plowshares has fias very little effect on plow draft in ordinary plow ing in tough sod sad however dull shares do increase draft very much where the average draft bf a 14 inch plow working g 8 5 inches deep wai was pounds while lewith with the e aage dulled to one eighth inch but with mill other krondl I 1 eions the same the draft i was as in creased to pounds this isan Is an ln in crease of 19 per scent cent due to dull she share re I 1 sih iii 1 alfalfa fiod jowas cwi iwi s illia alg 0 found that 4 sharp shar p share phare helped the jile 1 I plow penetrate hard gronna gron nd hende hence for spring plowing only oily the point need bw be kept sharp while letor for plowing bodor sod or in hard bard sol soil 1 it is important that both point and share be kept sharp 01 |