. Canadian journal of agricultural science. Agricultural Institute of Canada; Agriculture. ij \ Plcu) running empty in fhnva> /68 It) ^e tofa/ Jra/y 4-76 y iPM mou/cf Aoard remofed 4^^'^/J>3-. iSi'/eST' Z66/As. required to eat t/ie f?/rrouf s//ee 476'-45f-tZ /urn given "lead" to the "land". (See Figures lOB and IOC.) When plowing taudem it is 'sometimes neces- sary to give a little "lead" awaj' from tJie land, but it iLsually straight. Colters and their Effect on Draft. Experiments .liave shown that a colter reduce? the draft from 11 to 25 p
. Canadian journal of agricultural science. Agricultural Institute of Canada; Agriculture. ij \ Plcu) running empty in fhnva> /68 It) ^e tofa/ Jra/y 4-76 y iPM mou/cf Aoard remofed 4^^'^/J>3-. iSi'/eST' Z66/As. required to eat t/ie f?/rrouf s//ee 476'-45f-tZ /urn given "lead" to the "land". (See Figures lOB and IOC.) When plowing taudem it is 'sometimes neces- sary to give a little "lead" awaj' from tJie land, but it iLsually straight. Colters and their Effect on Draft. Experiments .liave shown that a colter reduce? the draft from 11 to 25 per cent on the draft. The proper set of this attachment has also been covered. Size of Furrow. If you refer to Figure 14, you will see that the draft, of the plow can be classified under three main heads. According to Sanborn "the plow shows the draft w^ien set to cut the widest ; This is pi'obably accounted for by the remarkable results of an experiment at the Utdca trials, which showed that 55 per cent of the draft was used in cutting tlie furrow slice, 35 per cent by the friction of the implement and only 10 per cent was required to lift and turn the furrow. The average draft of a number of plows running in t^e empty furrow was 168 pounds. The total draft was 476 pounds, and the draft with the moldboard removed was 434 pounds. The difference between 168 and 434 pounds' was taken to be the draft required for cutting the furrow slice. He states later that 42 per cent of the draft is used by the share and t^e landside, and another writer put the moldboard friction at only 2 per cent. This, however, seeuK low. These figures will not hold for all conditions, but even an approx- imate idea of the division of the draft explains many frequently misunderstood Line of Draft. When the depth of plowing is doubled t;ie draft is increased about To per cent, and not twice as much, as might be -/?â /}/"/ Of F/i/i/1 /1//c/i/^e/iY We now co
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