Sophisticated hydraulic systems are now available on all modern tractors capable of performing additional functions including the operation and control of a multiplicity of implements and machines mounted to the rear, front or side of the tractor including loaders, mowers, agrochemical applicators, harvesters and feeders. While many of these are mechanically driven through the power-take-off (PTO) shaft at the rear of the tractor, hydraulic-drive systems provide additional flexibility due to the flexible power hoses that interconnect the driving and driven units.
A third effect, discussed in detail in the next section, is that higher capital costs produce a bias in mechanization toward power-intensive operations. Finally, higher capital costs influence the design of machines; if repair costs are relatively low, designs emphasize repair over durability.

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Sophisticated hydraulic systems are now available on all modern tractors capable of performing additional functions including the operation and control of a multiplicity of implements and machines mounted to the rear, front or side of the tractor including loaders, mowers, agrochemical applicators, harvesters and feeders. While many of these are mechanically driven through the power-take-off (PTO) shaft at the rear of the tractor, hydraulic-drive systems provide additional flexibility due to the flexible power hoses that interconnect the driving and driven units.
A third effect, discussed in detail in the next section, is that higher capital costs produce a bias in mechanization toward power-intensive operations. Finally, higher capital costs influence the design of machines; if repair costs are relatively low, designs emphasize repair over durability.

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