Document Type : Original Article
Authors
1
Prof. of Agricultural Engineering, Agricultural Mechanical Department, Faculty of Agricultural, Kafr El-Sheikh, Tanta, University, Egypt
2
Researcher, Director of Rice Mechanical Center, Agricultural Engineering Research Institute, Agricultural Research Center, Dokki, Giza, Egypt
3
Agricultural Engineering Research Institute, Agricultural Research Center, Dokki, Giza, Egypt
Abstract
Experiments were carried out at the research farm of the Rice Mechanization Center, Meet El-Dyba, Kafr El-Sheikh Governorate during the summer season of 1996/97. The present study showed the effect of three turning plows on the plowing and inversion degrees of soil and indicated the effect of K-ratio (share width/plowing depth) on inversion degree at four levels of soil moisture contents, plowing speeds and plowing depths under local prevailing conditions. The results showed that the maximum degrees of soil plowing were 28.30, 24.73 and 30.2% for disc, modified moldboard and moldboard plows, respectively, at plowing depths of 25.31, 18.28 and 26.46cm and plowing speed of 5.37 km/h. The maximum values of soil inversion degrees were found to be 40.63, 43.75 and 68.75% for these plows, respectively, at plowing speed of 2.18km/h, plowing depth of 27.43, 19.81 and 28.32 cm, respectively and soil moisture content of 19.98%. Whilst the minimum values of 30.2, 28.9 and 45.2% were obtained with the same plows at plowing depth of 8.1, 8.4 and 7.5cm, respectively, and soil moisture content of 16.81% and plowing speed of 5.37km/h. The k-ratios of 1.13, 1.21 and 1.42 gave the maximum inversion degrees with plowing depths of 27.31, 19.81 and 28.32cm, respectively, at plowing speed of 2.18 km/h and soil moisture content of 19.98%.
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