Abstract
This study vvas made in order to determine how much the type of cotton affects the design parameters such as vacuum pressure, suction speed and break-off force in a simple cotton picking machinery. The vacuum pressure, suction speed and curl break-off forces belonging to the cotton types of DPXxC//BixLa hybrid and Nazilli 84 which is stili being developed in accordance with the mechanical harvesting were measured. The statistical relationships between measured design parameters and cotton variety were searched. İt was observed that there ıs no statistical difference betvveen types in aspect of suction speed and values of vacuum pressure where as the types differ in aspect of lock break-off force. The lock break-off force of the type of Nazilli 84 vvas been found lower than the kind whıch is stili being developed Although the break-off forces of cotton variety are different it is observed that suction speed of 2 m s in average and a vacuum pressure of -5 kPa is sufficient for the locks to be broken off from the bolls
Highlights
Cotton is an important and strategical agricultural product
In Turkey a great portion of cotton harvest is realised by human labor force
Considering the current cotton facilities in Turkey it would be beneficial to develope a simple machinery decreasing the requirement for labor force
Summary
Cotton is an important and strategical agricultural product. One of the major problems faced with in cotton which is grown in different sizes of areas is harvest (Tunçer and I şı k 1999). The machinery consists of a picking edge of the brim diameter of which can be adjusted, a vacuum storage the below lid of which can be opened, a depot where the cotton harvested is collected and a vacuum unit imposed from a movable power source.
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