الفهرس 
Corn cropOnly 14 pages are availabe for public view
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Abstract
The present study was carried out in the workshop of the Agricultural
Engineering Department, Faculty of Agriculture, Menoufia University.
The main objective was to compare the performance criteria between a
modified and non modified chopping machines. The modification was
concerned adding a transported belt to the traditional chopping machine.
The belt transported the corn stems during chopping process. The studied
factors were, rotational speed of knives, corn moisture content before
chopping process and feeding quantity of corn stems. The affected
parameters due to changing the studied factors were, actual chopping
time, cutting efficiency, rate of fuel consumption, the productivity,
required chopping power and energy requirements. The obtained results
recommended using the modified chopping machine due to its higher
criteria at all levels of the studied factors besides protecting the labor.
The main results obtained can be summarized as a follow:
1- The lowest actual chopping time(3.72sec) was observed with the
modified machine at 2000 rpm of knives rotational speed, 0.67 kg of
feeding quantity and 73.45% of corn moisture content.
2- The lowest value of fuel consumption was 1.7 lit/h occurred at 54.11%
of corn moisture content with 0.67 kg of feeding quantity and 1200
rpm of knives rotational speed for the non modified machine.
3- The best chopping efficiency occurred at 54.11% of corn moisture
content was 96.96% with 0.67 kg of corn feeding quantity and 2000
rpm of knives rotational speed for the modified machine.