Show farmers should study tractor operating cost ni n two factors are important in traci sor or costs one is ia the number of fours ours used the other economical loading abing ading the first entails a study of n ahe he machines varied uses and of he possibility of increasing these ases uses the latter necessitates a tudy of the draft requirement of erent implements and the ways kopd hid means of devising tractor hook aps k an example will help to make djus 1 his point clear A 14 inch mold oard card plow at a certain depth will lave ve a draft of pounds A one ray ay plow 14 inches wide would re luire a pull of about pounds thile chile that width of spike tooth harrow ow has a draft of only slightly are nore than 50 pounds hsuch A such a variation is true of all bjeld implements and to load a trac I 1 afar v pr of a certain size economically I 1 de he operator must know the diate at e draft of each tool clr ay iy tractor engineers and farm management Me gement experts agree that each owner should make a study f his machine to determine what pill h a b be e an economical load and then li 1 minate binate as much as possible the ip of hitches with lower baft requirements manufacturers j tractors can furnish approximate agures gures on draft for each machine hit |