Not trying to start an argument here, but when tractor mfgs. inergrated draft & depth control such as Draft-O-matic 3pt on Case tractors, the depth control portion set paramiters of where the hitch arms dropped to. The draft control sensed how hard the plow pulled. The harder the plow pulled the more the hitch armes tried to raise the plow, transfering the implement weight AND soil weight to the rear wheels of the tractor. Also when the hyd. sensing is cycling and transferring weight to the rear wheels, weight on the front of the tractor is also transferred to the rear wheels at a ratio of about 4 to 1. A pound of weight on the front was worth4# of rear wheel weights. The back wheels of the tractor were the fullcrum point of a teater taughter. Soil compaction in the bottom of the furrow is of GREAT consern. Plow shears have a tendancy to trowel a smooth surface at the bottom of the furrow which restricts moisture movement also. Shank tillage eliminates deep compaction that in furrow plows cause and eliminate the troweling effect. Disc harrows are also known villins for causing soil compaction. Modern day full 4WD tractors ar the best at reducing compaction, because the are built with about 65% of their static weight on the front axle and 35% on the rear. When they are pulling the weight of the front of the tractor transfers to the rear spreading the weight equally on all 4 corners of the tractor. 4WAs are also better than conventional 2WDs, because they spread the combined tractive HP to 4 wheels instead of 2 so less phisical weight is required to pull the same implement.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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