INVESTIGATE A SIMPLE DESIGN FOR SWEET POTATO HARVESTING

Ismail, Z. E.; Amine, E. E.; El-Shabrawy, T. H.; Faleih, H.S.

doi:10.21608/mjae.2014.98253

INVESTIGATE A SIMPLE DESIGN FOR SWEET POTATO HARVESTING

Document Type : Original Article

Authors

¹ Prof. of power technology and farm machinery, Agric. Eng. Dept. Facof Agric. Mansoura Univ., Egypt.

² Prof and head of Agric. Eng. Dept. Fac. of Agric. Mansoura Univ.

³ Literature of Agric. Eng., Agric. Eng. Dept. Dept. Fac. of Agric. Mansoura Univ., Egypt.

⁴ Student of Post degree in Agric. Eng. Dept. Fac. of Agric. Mansoura Univ., Egypt.

10.21608/mjae.2014.98253

Abstract

The digging harvesting machine was modified and tested to perform the effect of harvesting speeds on harvesting qualities such as sweet potato lifting, un-lifting, damaged, un-damaged, soil adhesion on tuber surface and machine productivity. These indicators were evaluated under condition of medium at El Dakahlia Governorate (Belqas), Egyptian. A lot of experimental field were conducted on sweet potato harvesting under three different levels of separator length (450, 700 and 1200mm); reciprocated cam with link length of 180, 210 and 240 mm and three forward speeds (3.6;, 5.1 and 7.2km/h) under digging Nose share.. The obtained results concluded that the maximum value of sweet potato lifting efficiency was 97.14% recorded at 3.6 km/h harvesting speed and reciprocated cam with link length of 180mm. At reciprocated cam with link length of 180mm, increasing forward speed from 3.6 to 7.2 km/h increased the un-lifted of 2.74; 1.26 and 1.19 times at separator length of 450, 700 and 1200mm respectively. Generally, increasing harvesting speed increased sweet potato damage and decreased un-damage percentage. For example, at reciprocated cam with link length of 180mm, increasing forward speed from 3.6 to 7.2 km/h increased mechanical damage from 2.80 to 3.85% and decreased un-damage from 97.12 to 96.15% at separator length of 450mm. The harvesting forward speed strongly affected soil adhesion on sweet potato surface. By increasing forward speed from 3.6 to 7.2 km/h decreased soil adhesion on sweet potato surface under all treatments except at reciprocated cam with link length of 180mm.

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