. Canadian journal of agricultural science. Agricultural Institute of Canada; Agriculture. Figure OA Take a Itoard and bore a hole in the centre, and when you attach a string and pull it ah)ng you will notice it pulls straight. Bore another hole in one corner and you will see that the board pulls at an angle. T,he centre line is the load line or centre of draft line and is fixed for the board and the stone- boat. But. you say. what has this to do with the plow? Where is the centre line in the plow? It Is about two inciies inside the landside of the plow bottom (see Figures 10, lOA and lOB). It
. Canadian journal of agricultural science. Agricultural Institute of Canada; Agriculture. Figure OA Take a Itoard and bore a hole in the centre, and when you attach a string and pull it ah)ng you will notice it pulls straight. Bore another hole in one corner and you will see that the board pulls at an angle. T,he centre line is the load line or centre of draft line and is fixed for the board and the stone- boat. But. you say. what has this to do with the plow? Where is the centre line in the plow? It Is about two inciies inside the landside of the plow bottom (see Figures 10, lOA and lOB). It may move closer to the centre in the steeper form;' of mold boards. You will see the loadline for Ciich plow Ixittom marked as well as the centre of draft line for tlie plow, 19 inches from the furrow wall. Why is the load line not in the centre of each furrow? Because it takes 50 per cent of the total draft of t*ie imjilement to cut the furrow slice, aJid therefore the loadline is nearer the landside. You cainiot hitch four abreast (and further reference to four abreast. Figure 10. means three on the land and one in the furrow) and hitch at a point 19 inc^ies from the furrow wall. You have to hitch further to the land and the result is the plow pulls at an angle. (See Figure IOC.) To overcome this twisting effect you give y(mr front furi-ow wheel "lead'' away from the land. Is that not so? It takes power to hold tiie plow Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa [etc. ]
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