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Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

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79<br />

Do~ Calculations<br />

The actual initial concentration of solution 1n the concentrate chamber is<br />

unaffected by distance or area covered, however, the initial dosage rate/a<br />

converted from this concentration does vary as to total area covered. In<br />

general a given amount of material is placed in the concentrate tank depend:i.l1gon<br />

the desired total plot size aJild'the desired dosages. The float valve (wooden<br />

ball) on the 'diluent supply has'the advantage of allowing, accurate calculation<br />

of rates used in case the desired plot length was"''missed'' by the applicator.<br />

With any spray application,·&peed must be constant. .All of the above generalizations<br />

regarding dosages with·this sprayer are based on the assumption that<br />

walking speed is constant. If the desired plot length is not attained, it must<br />

be assumed that the speed was incorrect but yet coostant. Data by Riee c$X1d<br />

Terry (5) show that

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