A. Sharifi Malvajerdi; M. Younesi Alamouti; A. Mohsenimanesh
Abstract
Soil compaction can occur as a result of a number of factors. One of the most important factors is soil response to pressures imposed by wheels and soil engaging tools. This research investigated the effect of tyre load and inflation pressure on soil compaction-related factors. These factors include ...
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Soil compaction can occur as a result of a number of factors. One of the most important factors is soil response to pressures imposed by wheels and soil engaging tools. This research investigated the effect of tyre load and inflation pressure on soil compaction-related factors. These factors include rut width, rut depth, cone index and horizontal force in different layers of soil profile. In this research a stiff carcass tyre has been used and a soil compaction profile sensor in controlled soil bin laboratory conditions. This sensor consisted of eight flaps, each equipped with strain gauges, installed on a subsoiler leg face with working depth of 45 cm. Studies were conducted using a factorial experiment at two levels of axle load of 6.3 kN and 23.9 kN and three levels of inflation pressure of 324 kPa, 524 kPa and 724 kPa with three replications in a randomized complete design. Duncan test and F test were applied to compare the means of pressure and axle load, respectively. The soil compaction profile sensor measured soil compaction at different layers from soil surface to 45 cm depth at 5 cm interval. The results of experiments indicated that vertical load significantly affected the horizontal force at different tyre inflation pressures on the soil profile. The tyre inflation pressure exhibited greater effects on shallow depths than those of higher depths. The amount of rut width, rut depth and cone index increased with an increase in vertical load. Increasing of the inflation pressure decreased rut width and increased rut depth and cone index.
M. Younesi Alamouti; A. Sharifi Malvajerdi
Abstract
Using the cropping operations program can significantly save fuel consumption and energy efficiency. Prediction of the accurate amount of fuel requirements for tillage operation of the soil is difficult. Changes in humidity, soil type and tillage depth directly affects on the amount of fuel consumption. ...
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Using the cropping operations program can significantly save fuel consumption and energy efficiency. Prediction of the accurate amount of fuel requirements for tillage operation of the soil is difficult. Changes in humidity, soil type and tillage depth directly affects on the amount of fuel consumption. Bulk density of agricultural soils depends on tillage methods, the value of organic matter, tillage depth and implements. Therefore, in this study, the effects of four types of tillage implements including moldboard plow, heavy duty disk, chisel plow and combinated tillage machine (minimum tillage), on the amount of power required and fuel consumption and some soil physical properties including bulk density, penetration resistance and organic carbon contents in a randomized complete block design was studied. The results showed that minimum tillage with combinated machine, increased the amount of organic matter, reduced fuel consumption and needed less power. The highest fuel consumption of 58.03 liters per hectare and the lowest 8.64 liters per hectare, related to the moldboard plow and heavy disk, respectively. Mean values of soil organic carbon related to the moldboard plow, combinate, chisel plow and heavy disk were 0.31, 0.64, 0.50 and 0.55 percent, respectively. Differences in mean values of the soil organic carbon due to tillage with heavy duty disk and combinate compare to moldboard plow were significant and both were belonging to two separated groups.
