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Procedure for Measuring Distribution Uniformity and Calibrating Granular Broadcast Spreaders

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

ASAE  ASAE S341.5   May  2018

Keywords: Distribution, Granular, Spreaders, Test

1 Purpose and Scope

1.1  Purpose. The purpose of this Standard is to establish a uniform method of determining and reporting performance data on broadcast spreaders designed to surface apply granular materials. Tests performed according to this Standard make it possible to predict distribution uniformity of a broadcast spreader and to compare spreader distribution patterns.

1.2  Scope. This Standard pertains to centrifugal, pendulum, and other types of broadcast spreaders designed for dry granular application while operating on the soil surface. Portions of the test procedures outlined herein are suitable for determining the delivery rate of gravity or drop spreaders; however, additional tests not covered in this Standard are needed to completely evaluate the performance of gravity spreaders. This Standard does not cover dry pneumatic granular applicators.

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