الفهرس 
-Only 14 pages are availabe for public view
 |  | from | 164 |  |  |
| | | from | 164 | | |
Abstract
The objectives of the present study are :1-To construct and evaluate an electronic control system on grain drill unit.2-To study some parameters which are affecting seed passing through feeding gate and sed tube untill seedbed in the soil.3-To control effectively the seeding rate machine productivity and reduce the seed losses by using the electronic control system.4-To evaluate the operating speed,machine efficiency,yield and its components and grain losses during harvesting as affected by different planting methods of rice.5-To determine the energy requirement for rice production.6-To evaluate the different methods of rice production economically.