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THE SLIPPAGE AND SOME TECHINCAL PARAMETERS FOR TWO TYPES OF PLOWS | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 41, Issue 3, 2010, Pages 116-123 | ||
| Author | ||
| Jinan. H. N. ALTalabani | ||
| Abstract | ||
| This experiment was conducted on a silty clay loam soil which was planted with two crops : corn and sunflower . Plant residues and weed plants were left on soil surface before performing plowing proeess . The experiment consisted of two types of plowing : Chisel plow and moldboard plow . The second factor of the experiment involved two plowing depths :15 and 22cm .The tractor speed for the chisel plowing was 3.375 km /hr,while that for the moldboard plowing was 2.571km/hr. Arandomized complete blok design (RCBD)in a split – plot arrangement was used in this experiment with three replications.The soil moisture content range during the time of the plowing was 16 to17 % . The results obtained indicated that there were significant differences between the plowing types and depths of plowing along with their interactions for all parameters studied . For a constant plowing depth , the chisel plow gave the highest slippage percentage of 33.912% with a practical productivity of 0.336 ha/hr and the highest disturbed soil volume of 517.10 m3/h.The moldboard plow gave the highest field efficiency of 61.293% and also gave the highest number of clods >10cm in diameter which was 11.666 clods in meter square .On the other hand , for any plow ,increasing plowing depth from 15to 22cm gave the highest slippage percentage range of 24.805 to 40.22% with a soil disturbed volume of 391.47 to 437.97 m3/h. The depth 15 cm marked by having a number of clods >10 cm as many as 7clods /m2 . Ingcreasing plowin depth from 15to22cm decreased the practical productivity from 0.279 to 0.223 ha/hr and also decreased the field efficiency of paactical productivity from 59.772 to 47.682 % . | ||
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