Volvo ew145 B Unbelievable Work!!

As long as agricultural wages were relatively low, large farmers found it more efficient to maintain a tractor and truck along with some horses. Horses did virtually all the jobs for which power was not the overriding input. Each power source specialized in the tasks for which it had the greatest comparative advantage.

For example, the growth of tractors in the United States was spread over a fifty-year period with occasional spurts, but once tractors became available, they took over primary tillage within a much shorter time. Their further growth involved shifting extra operations from horses to tractors. Today few farms in the Indian Punjab plow land with animals, thresh wheat by hand, or use Persian wheels. This is only fifteen years after tractors, threshers, and pumps became an important factor in Punjab farming.

Volvo ew145 B / TR construction machine promotional video - Various working video clips.
However, if the weather is bad and the quality of the grain is in danger, it may be more economical to protect quality by harvesting early (before ripeness) even if an increased post-harvest drying cost is incurred. Due to the timeliness factor, machinery of a somewhat higher capacity is often employed to avoid timeliness penalties that may accrue due to the use of a contractor, machine breakdown and repair, bad weather or operator illness.

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Other things being equal, farming output will therefore fall (or grow more slowly), depending on the elasticity of final demand. Farmers mechanize, although they can seldom prevent some increase in their production cost. The best example of these trends comes from the United States after 1940. The use of tractors, combines, and other machines expanded at unprecedented rates. Although labor input per acre or per animal had declined a little between 1915 and 1939, it fell sharply after 1940.

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