A Novel Approach to the Prediction of Tillage Tool Draught using a Standard Tine |
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| Institution: | 1. Agricultural Machinery Research and Design Centre, University of South Australia, The Levels, Warrendi Road, Australia, SA 5095;2. Silsoe College of Cranfield University, Silsoe, Bedford, U.K., MK45 4DT;1. Department of Industrial Systems Engineering and Design, Jaume I University, Avda. de Vicente Sos Baynat, s/n, Castellón, 12071, Spain;2. Department of Mechanical Engineering and Materials, Polytechnic University of Valencia, Camino de Vera, s/n, Valencia, 46022, Spain;1. Dipartimento di Fisica e Astronomia, Università di Bologna, via Irnerio 46, Bologna, Italy;2. Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, via Irnerio 46, Bologna, Italy;3. Dipartimento di Ingegneria Industriale, Università di Bologna, via Fontanelle 40, Forlì, Italy;1. Department of Biosystem Engineering, Sari Agricultural Science and Natural Resources University, 9th km of Sea Road, Sari, Iran;2. Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran;3. Department of Polymer Engineering, Tarbiat Modares University, Tehran, Iran;1. Biosystems Engineering Department, College of Agriculture, Shiraz University, Shiraz, Iran;2. Department of Mechanical Engineering of Biosystems, Faculty of Agriculture, Shahrekord University, Shahrekord 88186-34141, Iran;3. Department of Mechanical Engineering of Biosystems, Faculty of Agriculture, Jahrom University, PO BOX 74135-111, Jahrom, Iran |
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| Abstract: | An investigation was conducted to develop and validate a novel approach to the prediction of the draught required by primary tillage implements op- erating in field conditions. A methodology was developed based upon an existing force prediction model which describes the draught of a standard tine as the product of two factors, related to soil strength and tool geometry respectively. The methodology results in a two-step prediction procedure, which consists of (1) establishing, in a reference soil condition, some comparative draught relationships (tool index I) be- tween the standard tine and each tillage implement and, (2) measuring the draught of the standard tine in the field. The tool index relationships were determined under laboratory conditions for a number of single tillage tools over a range of working depths, and the methodology was validated in four field conditions, namely: two friable sandy-loams, a compact clay and a plastic clay soil. Predicted draughts were on average within 18% of the measured values. In the friable soil conditions, the average prediction errors for the tine tools, mouldboard body and disc tool were 14%, 16% and 30% respectively. The corresponding errors for the same tools in the plastic clay were 18%, 26% and 26% respectively. |
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