"Effect of Soil moisture content and tillage depth on tractor performance with using moldboard plow in silty-clay soil"

Fawzy F. Khorshid
Faculty of Agricultural Science-Sulaimani University, Bakrajo Street, Sulaimaniyah-Iraq


The experiment was conducted in the field of Faculty of agriculture science /
sulaimani University in 2012 – 2013 to study the Effect of Soil moisture content and
tillage depth on tractor performance with using moldboard plow in silty-clay soil.
Split plot design and randomized complete block design (RCBD) was used in this
study. Two factors including two tillage depth levels 15 and 25 cm represent the
main plot and three soil water content including 10, 15 and 20 % represent sub plot
were used in this study . Fuel consumption, Practical speed, Tire slippage, Tillage
soil volume, Soil penetration resistance, Porosity and No. Of soil clods that larger
than 10 cm where studded. The study shows that: - Significant differences were
observed between the two tillage depth treatment means, water content treatment
means, and them interaction means for all studied characters in the experiment. also
the study shows the best results for all the characters was for the treatment of depth
15 cm compared to the depth of 25 cm, while the opposite happened for the tillage
soil volume where the depth 25 cm Superiority on 15 cm depth by giving him the
highest value. as for water content factor, the value for fuel consumption, practical
speed, tire slippage, and tillage soil volume increased Significantly with increasing
soil water content from 10 to 15 then to 20%, while the values for other characters
decreased. Also There were differences among the interaction treatment means for
all characters value in the experiment that most of them where significant.

Key Words:
Soil Moisture
Tillage Depth
Mechanical Properties
Soil Physical Properties
Triple Mold Board Plow


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