Mechanical harvesting of sugar beel is not widely spread in Egypt. manual
harvesting is a tedious and exhausUve Job especially In the newly reclaimed land.
The objective of this paper is to build and develop e simple liable and sugar beet
harvester unil for small farms. The study is divided into two parts. The first is the
theoretical study 10 determine the forces affecting on the lifting share during
hervesting operation, and to find the malhematical relations of the forces affecting the
beet lif.hg and damage. The second is e,e experimental field which, conductir.!:j
under three forward speeds. three digging angles and three blade widths. The theoretical study showed that both the horizontal ·HF~ and the vertical ·VF"
forces were gradually increased with both of tilt angle and share Width. It also
revealed that the effect of tilt angle was greater than the effect of share widt on the
horizontal force while their effect on the vertical force was almost the same. he field
experiment was coincident with the Iheoretical study. \Alhich,' at tilt angle, "23cm"
share width and ·3.5kmJh~ forward speed the share gave "98.5 %" of Ihe beet lifting
efficiency. Also the lowest percentage of beet damage was obtained at the above
conditions but when the share width was '21cm" the share width of "23cm" is not
recommended to be used with the developed share because of its Irre9uler effect.