The application rate is determined by:

1. The size of the opening of the meter housing assembly.

2. The travel speed.

The size of the opening is adjustable by turning the knobs (A) on the rear of the granular hoppers. There are 80 increments which indicate the relative application rate. The delivery rate will increase from 1 through 79. Setting 00 closes the opening completely. A fluted roller delivers the granular chemical to the adjustable opening.

The granular chemical flows through a given opening size at a nearly uniform rate regardless of rotor rpm. Therefore, SPEED has the greatest impact on application rate and resulting chemical concentration in the row.

For example, if planting speed is reduced from 9.7 to 4.8 km/h (6 to 3 mph), chemical concentration will nearly double since the delivery rate through the orifice remains nearly the same while the distance traveled in a given period of time has been cut in half. Therefore, twice as much chemical is placed on the ground due to the decrease in ground speed.

Rotor rpm will not change the chemical meter delivery rate unless the seed population is changed significantly (i.e. ± 25 per cent or more from the original setting.)

The rate charts in this section are approximate, and are based on a planting speed of 8 km/h (5 mph). They are to be used only as a guide to determine a starting point for the meter dial setting.

Always check your rate of application as outlined in this section to be sure you are getting the desired rate.

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