Field Evaluation of Grain Loss Monitor in Different Harvesting Condition on Combine JD-955
2007
Mostofi Sarkari, Mohammad Reza | Jamshidi, Bahareh | Minaei, Sa`id
Grain loss monitors are instruments which are installed on combine and make possibility to measure grain loss on different parts of combine. The instrument permits combine operator to use proper ground speed to keep grain loss in acceptable range. There was used indicator system to measure grain which flows on straw walker and sieves that indicates loss rate continuously. In this study, grain loss monitor (KEE) was mounted behind the straw walker and sieves of John Deer 955 combine harvester. Crop and machine performance parameters then were measured as grain moisture content, yield, combine ground speed and processing loss, respectively. Combine harvester equipped with grain loss monitor was assessed on the wheat harvesting. During harvesting plots, loss rate was measured and indicated using diodes of grain loss monitor to the operator. The loss rate shows combine processing loss. There is sound alarm on monitor which notify to operator that which part have a more loss than standard range. It will be then adjusted and continued to harvesting. In order to evaluate instrument precision, indicated loss with measured loss was compared and investigated. Treatments of this study were: 1- ground speed of combine harvester in three levels of 2.5-3, 3-3.5 & 3.5-4 km/hr as a main plot, 2- combine drum speed in three levels of 650, 750 & 850 rpm as a sub plot. Experimental design was split plot in a completely randomized block design with three replications. The results of two years research and study show that the processing loss of combine harvester was about 1% and adapted with ASAE standard No. S396.2 on 10-12% grain moisture content and 750 rpm drum speed. Also there was no difference between measured and expected processing lossmeans loss rate indicated using grain loss monitor adapted with measured processing loss.
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