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In a field experiment, a sandy loam was subjected to single passes with a sugar beet harvester at two different soil water potentials and two different hopper fillings. The moist plot responded to a wheel load of 11,23 t with an increase in bulk density and pre-consolidation pressure as well as with a decrease in…

The contact area of six different tyres was measured as a function of the tyre inflation pressure. In all tyres, a decrease of the tyre inflation pressure led to an increase in contact area. The tyre inflation pressure at which the contact area increases the most depends on the type of tyre used. A new…