Corn Seed Disk Selection Guide — Vacuum Meter

Use the selection guide to determine the recommended seed disk first and then refer to vacuum level chart for initial vacuum setting.

Seed Shape	Seed Size	Recommended Starting Disk	If Population is Difficult to Control
Non-Uniform (mixed shapes)	Mixed sizes	Large sweet corn disk (A52391) with double eliminator	If over or under populating, adjust double eliminator
Uniform Flat	Less than 3,308 seeds/kg	Large sweet corn disk (A52391) with double eliminator	If over or under populating, adjust double eliminator
	3,308 — 6,175 seeds/kg	Small corn disk (A43215)	Adjust vacuum first. If unsuccessful, switch to large sweet corn disk (A52391) shown in the vacuum level chart.1
	More than 6,175 seeds/kg	Disk for sunflower and popcorn (H136478)	Adjust vacuum first. If unsuccessful, switch to small corn disk (A43215)
Uniform Round	Less than 3,308 seeds/kg	Standard corn disk (A50617)	Adjust vacuum
	3,308 — 6,175 seeds/kg	Small corn disk (A43215)	Adjust vacuum first. If unsuccessful, switch to standard corn disk (A50617)
	More than 6,175 seeds/kg	Disk for sunflower and popcorn (H136478)	Adjust vacuum first. If unsuccessful, switch to small corn disk (A43215)