تصميم و تصنيع أشكال مختلفة لسلاح محراث تحت التربة و تقييم أدائها الحقلي

الملخص EN

The first step of this study was conducted by manufacturing two shapes of subsoiler tines in a local work shop in Al-Mosul city, as were tapered-top with constant width tine and tapered-top with gradual width tine according to the conventional tine dimensions.

Then the field performance of these tines was compared with the conventional tine in tow fields.

The soil in the first field was loam in texture, While the second one was silty clay.

This done through measuring several indicators, Included pulling force, draw-bar power, slippage, wasted power due to slippage, fuel consumption soil disruption area and energy utilization efficiency.

Randomized complete block designed was adopted by using split-split block design.

The main results of the study are : The tapered-top tine with constant width has achieved the best (lower) values of pulling force, draw-bar power, slippage, wasted power due to slippage, and slippage and fuel consumption.

While, the tapered-top tine with gradual width showed the best (higher) value of soil disruption area and energy utilization efficiency.

The interaction among soil conditions, subsoiling depths and tines shapes was not significantly effected on the studied indicators.