Development and evaluation of Pakistany "Naeem drill" for barley grains [electronic resource].

Includes references.

The aims of this study is to develop and evaluate a simple constructed seed-drill imported from Pakistan as an accepted technology for Egyptian workshops and farmers. The main results in this study can be summarized in the following points: . - Discharge (per revolution of device) of barley grains decreased with the feeder speed. At different gate-openings 10, 20, 30, and 40 mm, this discharge decreased by 4.94, 2.55, 1.29, and 0.8 % respectively, when the speed was increased from 20 to 50 rpm (from 0.097 to 0.259 m/s feeder speed). - The visible damage of barley grains increased and germination decreased as the feeder speed increased for all gate-openings. In laboratory tests, increasing feeder speed from 0.097 to 0.259 m/s (ground-wheel speed from 20 to 50 rpm or 2.18· to 5.46 km/h) increased visible-damage percent from 0.089 to 0.172 %, increased invisible-damage percent from 0.15 to 2.89 %, and decreased percent of germination of barley grains from 89.261 to 86.438 %. But in field tests, increasing forward speed from 2.18 to 5.46 km/h (feeder speed from 0.098 to 0.28 m/s) decreased percent of germination of barley grains from 88.6 to 85.9% at gate opening width of 10 mm.

Summary in Arabic.

1