Spreader Calibration
and Testing Tools by

The evaluation of field distribution of fertilizer spreaders as well as control of both hardness and kernel sizes of fertilizer types is needed to ensure the quality of spreading application. The fertilizer trays are used to evaluate the field distribution of fertilizer spreaders or other granular applications.

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The trays are packed with either 5 or 7 units, and include inserts to prevent the kernels from bouncing out of the trays during the test. The trays are placed in the field at certain distances, perpendicular to the driving direction. By driving over the trays while spreading fertilizer, the kernels are caught by the trays so the distribution can be determined. For very precise measurements, the trays need to be placed closer to one another.

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The distribution in the field can easily be checked by pouring the kernels from the tray into the measuring glasses. For a more precise scheme of the spreading patterns, more trays can be placed closer to each other along the measuring line and their contents can be weighed.

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A hardness tester is available to check the spreading quality of the fertilizers. Kernels that are too soft will turn into dust after they get in contact with the spreader elements.

 

A fertilizer calibrator with grading sieves can be supplied to control the average size of the kernels (to be able to apply the spreader charts from the manufacturers) .