Predicting rolling resistance tractor-performance using soil properties.
Abstract: A sinkage plate, was used to determine soil parameters (kc, k, and n). an implement was constructed at the tractor research station from steel and equipped with a manual hydurlic pump to push the plate into the soil at steady speed. The plate force acts on a dial whose reading is taken due to the oil pressure. The plate sinkage was measured at corresponding force. Tests were conducted on three soil types at Nubaria area and Etay El-Barod Research Stations with three different plate dimensions of (1011), 1213) and (1516) cm. The three soil types were silty clay at (Etay El-Barod) and sandy loam and sand (at Nubaria). The mechanical analysis of each soil type was determined. Three soil samples from each site were taken for the determination of soil mechanical analysis. The specification tractor used at experimental field was Nasr 48.75 kw (65 hp), total tractor weight without water and additional weight 22 kN, front wheel weight 8.28945 kN, rear wheel weight 13.8321 kN, the additional weight on front eight weights each 0.2943 kN, the additional weight on rear two weight on each wheel with 0.5886 kN and maximum water can be add to rear wheel 340 liter. The front wheel size 6.5-20 and the rear wheel 14-30. the tractor tyre dimensions are 0.4 width and 1.45 m diameter. The soil parameters k, kc and n in Bekker equation were determined for the three soil types. Eight models to described coefficient of rolling resistance are compared with experimental to determine the validation of each. The Bekker model was the closest one to the field experiment for the different soil types. The other models used for predicting rolling resistance are valid for silty clay soil such as Tunage, Wismer and luth and Brixius. Others like Dwyer model give a good result for sandy loam soil.
Publication year 2004
Pages 310 - 297
Availability location مكتبة كلية الزراعة جامعة الازهر
Availability number
Organization Name
Country Egypt
City القاهرة
Publisher Name: الجمعية المصرية للهندسة الزراعية
serial title المؤتمر الثانى عشر للجمعية المصرية للهندسة الزراعية أكتوبر 2004م
Department Agriculture Power and Energy
Author(s) from ARC
Agris Categories Agricultural engineering
AGROVOC
TERMS		 Rolling.
Publication Type Conference/Workshop
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