TY - SER AU - Arfa,G.K. TI - The effect of harvesting opration on potato crop handling KW - Potatoes KW - Breeding KW - Growth KW - Harveting KW - Handling N1 - Includes references N2 - This study aimed to investigate the effect of some operational factors related to harvesting machine on damage and unlifted potato tubers. These factors included: Three different forward speed 3.02, 4.25 and 5.2 km/h, three different chain speeds 2.3,3.5 and 4.65 km/h, three different agitation throw-out zero, 1and 2 cm, three different chain inclinations 15, 20 and 25 degree, three different harvesting depths 10, 16 and 22 cm and soil moisture content 15, 20 and 25% and storage time after harvesting 0,1,2,3 and 4 week. The experiments were carried out in Nubaria location, el-Bheara Governorate in 2006. From the obtained results, it was cleared that the proper condition to operate the harvesting machine were 22 cm harvesting depths,5.2 km/h forward speed, 4.65 chain speed, zero agitation throw-out, 15% soil moisture content and primary chain inclination of 15 degree. The moisture content of potato tubers varied with storage time after harvesting UR - http://nile.enal.sci.eg/EALE/2007/MJAE/2407/3/492.pdf ER -