The Turks built the world's largest airport

Different crops vary widely, however, in the type of labor required-that is, in their power- and control-intensity. Harvesting of root crops is probably the most power-intensive, although it still requires significan control. At the other extreme, cotton, fruit, and vegetables require intensive control: in the case of apples, the threat of damage is so large that their harvesting has still not been successfully mechanized.

The demise of the oxen in American and European agriculture was largely the result of their inability to work harvesting machines. When tractors became available, they could pull harvesting machines with only minor modifications. Nevertheless, horses did not lose their comparative advantage, even in harvesting, for some years.

Machinery Fantastic is Awesome Machine videos CenterFood production can be increased if the primary producer or farmer is provided with a guaranteed profitable income for the farm produce. With such guarantees the farmer can invest in the necessary inputs including mechanization to increase productivity, secure in the knowledge that, as productivity increases, income will increase enabling payback and facilitating further investment as required.

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The dominant energy sources on conventional farms in the developed world are diesel oil (to power tractors and other self-propelled equipment) and electricity (to provide light, heat and refrigeration; and to power electric motors to run milking machines, animal feeding systems, ventilation fans, water supply and irrigation systems).

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