STUDY THE EFFECT OF SOIL MOISTURE BEFORE TILLAGE AND TRACTOR TIRE PRESSURE ON PERFORMANCE EFFICIENCY OF MACHINERY UNIT

M. Madlol, K.; A. Mankhi, M.; G. Hussain, O.

	STUDY THE EFFECT OF SOIL MOISTURE BEFORE TILLAGE AND TRACTOR TIRE PRESSURE ON PERFORMANCE EFFICIENCY OF MACHINERY UNIT
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 18, Issue 1, 2013, Pages 0-0
Authors
K. M. Madlol; M. A. Mankhi; O. G. Hussain
Abstract
The experiment was conducted in one field of Agriculture College / University of Baghdad, which located 20km west of Baghdad in 2011 to study the effect of soil moisture and tractor tire pressure on performance efficiency of machinery unit. The tractors which used were Massey Ferguson MF – 650 and New Holland TD- 80 with sweep plow. Two levels of soil moisture before tillage included 13 and 18 % which represented main plots and two rear tires pressure included 1 and 2 bars which represented sub plots in this experiment. Slippage percentage, pulling force, fuel consumption, practical productivity and volume of disturbed soil were studies in this experiment. The experiment was carried out by using split plot under randomized complete block design with three replicates ,the result were analyzed statically and LSD was used to compare between the mean of treatment under 0.05 probability. The results were as follows: 1-Increasing soil moisture from 13 to 18 % caused a significant increase in slippage percentage 9.68 %, pulling force 7.06 kN, practical productivity 0.69 ha/h , volume of disturbed soil 1380 m3/h and a significant decrease in fuel consumption 28.43 L/ha. 2- Increasing tractor tires pressure from 1 to 2 bars caused a significant increase in practical productivity 0.67 ha/h and fuel consumption 31.38 L/ha and a significant decrease in pulling force 5.67kN. 3- Interaction between soil moisture 13% with rear tires pressure 1 bar was superior in getting less slippage percentage 6.03% while the interaction between soil moisture 13% with rear tires pressure 2 bar was superior in getting less pulling force 4.19 kN. Interaction between soil moisture 18% with rear tires pressure 1 bar was superior in getting less fuel consumption 26.72 L/h and the interaction between soil moisture 18% with rear tires pressure 2 bar was superior in getting highest practical productivity 0.70 ha/h and volume of disturbed soil 1400 m3/h. We conclude that increased soil moisture led to a significant increase in the percentage of slip, pulling force, practical productivity, the volume of disturbed soil and significant decrease in fuel consumption. Increased tractor tires pressure led to a significant increase in practical productivity, the fuel consumption and a significant decrease in the pulling force. The Interaction between soil moisture and rear tires pressure was significant effect in all the studied traits. We recommend using tractor's rear tires pressure 2 bar at the soil’s moisture content 18% when using the tractor Massey Ferguson MF-650 with sweep plow as machinery unit which achieved the highest practical productivity and the volume of disturbed soil with the best rate of fuel consumption and pulling force while the percentage of slip was within the permissible limits.

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