Abstract
ABSTRACT Aprototype of a vertical spreader was constructed and tested under both laboratory and field conditions. The experimental results were used to calculate the effective swath width and uniformity of distribution of the new spreader. Optimal swath widths of 54 m and 27 m were calculated for granular superphosphate and urea, respectively, with a coefficient of variation better than 15%. A moderate side wind did not affect the swath width but reduced the uniformity of distribution. The results of the research can be applied for a wide-swath and highly effective distribution method for granular materials.
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