Design and manufacture subsoil manure laying implement and studying its field performance

A manure laying implement was designed to bury the manure under the soil surface The main operations of the implement are digging the soil to make a shallow channel its depth is 30 cm to 60 cm, laying the manure in side the channel and bury the manure by retaining the dogged soil into the channel. The three operations are carried out simultaneously. The implement was designed to reduce the planting operations of the Tomato crop m the desert soil The conventional operations of planting tomato crop in the desert soil is dicing the soil manually by primitive tool to make a channel, the manure is laid in side the channel bottom and then buried. The purpose of burymg the manure in the soil is to increase the soil ability in retention the water at the surface layers and to provide the tomato crop with nutrients. The implement consists of a tine, two soil digging boards and two soil retaining boards. The tine consists of a shank and foot. The foot is provided with wings fixed on both sides of the foot. The implement is also provided with a tank of one tone capacity fixed on the implements frame. The manure is droped in side the channel mechanically. After manufacturing the implement, it was tested in the field to evaluate its performance using different operating depths (20cm , 30cm, 40cm 50cm and 60cm) The evaluation was carried out using the implement draft torce requirement, the cross-section width of the channel made by the implement, the specific resistance and the energy utilization efficiency of the implement The results showed that the increase in the operating depth increased the draft requirement of the implement considerably; increasing the operating depth from 20cm to 60cm increased the draft force from 12.63kN to 31.16kN (242%) The soil excavating boards required 4.35kN and 6.47kN at operating depths of 90cm and 60cm which consists of 35% and 21% from the total draft depths of 20cm and 60cm which consists of 35% and 21% from the total draft force of the implement. While the soil retaining boards required draft force of 4.05kN and 6.47kN which consists of 32% to 21% from the total draft force for the same operating depths respectively. The total draft requirement of the implement and the draft force of the soil excavating and retaining boards for the other operating depths are within the draft force range of the operating depth of 20cm and 60cm. There is great improvement in the implement field performance when the operating depth was increased from 20 cm to 60 cm , the cross-section width of the channel which made by the implement s stem and soil excavating boards increased from 0.11m2 to 0.48m2 (436%) . The specific resistance deceased considerably from 116.67 to 64.92kN/m2 (41%) which means the draft requirement of the implement to dig out one meter square of the cross-section width decreased by 41% when the operating depth was increased from 20cm to 60cm and this reduction is regarded a great improvement in the field performance. The energy utilization efficiency of the implement improved appreciably when the operating depth increased, it increased from 8.57m3/mJ to 15.40m3/mJ (80%) which means the implement digs 15.40m3 soil out of the channel bottom for one mega Joule of energy when the operating depth increased from 20cm to 60cm.