Abstract: A method of ameliorating acid soils so as to enhance plant growth is provided by adding to soil 0.05 to 20 percent by weight, based on the weight of the soil, of a flue gas desulfurization by-product consisting essentially of 80-99 percent by weight of gypsum (CaSO.sub.4.2H.sub.2 O) and 1-20 percent by weight of magnesium hydroxide (Mg(OH).sub.2).

Abstract: A limited slip differential comprises juxtaposed axle gears rotatably mounted in a carrier meshing with planet gears arranged in staggered pairs and also rotatably mounted in a carrier. A hydraulically actuated friction clutch is positioned between the carrier and floating ring gear, which is meshed to certain of the planet gears, to retard rotation of the planet gears in response to a rotational speed differential of the axle gears. Control means for automatically actuating the clutch comprises a plurality of pistons reciprocably mounted in one axle gear and a cam surface attached to the other axle gear for pressurizing, in response to a rotational speed differential of the axle gears, the actuating chambers of the clutch.

Abstract: A vehicle drive train includes a pair of drive shaft portions, and an intershaft differential connecting them. One drive shaft portion drives a pair of drive axles through a differential mechanism, each drive axle in turn driving a pair of wheels in tandem through a differential mechanism and chain and sprocket means. The other drive shaft portion drives another pair of vehicle wheels through a differential mechanism. The inter-shaft differential mechanism may be chosen to apply greater driving torque to one drive shaft portion, i.e., for example, the drive shaft portion which is utilized to drive the wheels in tandem, than is applied to the other drive shaft portion.