THE RELATIONSHIP BETWEEN  TRACTOR  PRACTICAL VELOCITY AND  DIFFERENT  MOISTURE CONTENT ON PLOWING  SOIL LAYER

Firas.S.Al-AnI,; Abdullah.N.Al-Ani,

	THE RELATIONSHIP BETWEEN TRACTOR PRACTICAL VELOCITY AND DIFFERENT MOISTURE CONTENT ON PLOWING SOIL LAYER
The Iraqi Journal of Agricultural Science
Article 1, Volume 41, Issue 3, 2010, Pages 124-129
Authors
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Abstract
Plow soil packed layer consisting of soil (induced hardpan) or (plow sole) is generally the result of the frequent passage of farm machinery and heavy machinery to carry out operations involving the preparation of agricultural land, cultivating, spraying, harvesting, transport and others. The emergence of this class, usually to reduce the productivity of the land because of the growth roots, proliferation and movement of air and water in that class. This study involved the performance of the DT-75 Crawler tractor with Moldboard Plow in a silt clay loam soil under three moisture levels and two practical speed and depth of tillage between 25 and 30 cm. one of the objectives of this study is to determine the impact on the characteristics of the soil layer between 35 and 45 cm. To have been measuring the bulk density, porosity and soil penetration resistance before and after the operations study. Results of the study showed that there are a significant differences happened under three moisture levels and two practical speed, the reduction in soil moisture content from 22 to 19 % increased soil bulk density and soil penetration resistance but reduced soil porosity .Further reduction in moisture content from 19 to 14% increased soil porosity and soil penetration resistance but decreased soil bulk density. The increasing of practical speed from 1L to 2L decreased soil bulk density and soil penetration resistance but increased porosity, its recommend &confirmed to use subsoil plow to break the packed layers and to reduce the impact of increased density and the apparent resistance to penetration and increase the porosity to improve the physical characteristics and make them more susceptible to the exploitation of agriculture.

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