The overall sequence of operations (Figure 8) is orientated towards protecting post-harvest product quality and minimizing loss due to deterioration occasioned by respiration, microbial activity, insects or rodents. Control of respiration (i.e. conversion of carbohydrates to carbon dioxide and water) in crop products is achieved by temperature reduction, most usually by refrigeration but also by periodic ventilation typically of the cold night air.
The most dramatic aspect of mechanization is the shift from one source of power to another. In ancient China cattle began to replace human labor more than 3,200 years ago. Between the second and fourth century A.D. fairly widespread use of water power is reported from China for rice pounding, grinding, and water lifting (Liu 1962).

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The overall sequence of operations (Figure 8) is orientated towards protecting post-harvest product quality and minimizing loss due to deterioration occasioned by respiration, microbial activity, insects or rodents. Control of respiration (i.e. conversion of carbohydrates to carbon dioxide and water) in crop products is achieved by temperature reduction, most usually by refrigeration but also by periodic ventilation typically of the cold night air.
The most dramatic aspect of mechanization is the shift from one source of power to another. In ancient China cattle began to replace human labor more than 3,200 years ago. Between the second and fourth century A.D. fairly widespread use of water power is reported from China for rice pounding, grinding, and water lifting (Liu 1962).

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