Comparison of different spread pattern determination techniques
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Traditionally, the performance of fertilizer spreaders is assessed using a row of collection trays aligned perpendicular to the driving direction of the tractor. For precise calibration of the spreader, this technique however does not provide adequate insight into the spreading process since information is only obtained in one spatial dimension. In this paper, two different 2D spread pattern determination techniques were tested, each consisting of a sampling method and a matching interpolation algorithm. Tests were executed under similar conditions with three commonly used types of fertilizer (CAN, NPK, KCl). Results were compared with the traditional technique. The differences found illustrate the importance of comparing spread patterns conducted with the same spread pattern determination technique.