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Effect of Drop Height in Bean Breakage
September 18, 2006

The amount of damage to pinto beans and navy beans at 12%-13% moisture content increases linearly with drop height, according to North Dakota State University.

Research has been conducted to determine if the amount of damage as beans are dropped into a storage bin, either onto concrete or onto other beans, was large enough to justify using a bean ladder.

The amount of damage and cracking to navy beans when dropped onto concrete was 2% from 5 ft., 6% from 10 ft., and 12% from 15 ft. The amount of damage to navy beans when dropped onto other beans was 2% from 5 ft., 3% from 10 ft., and 8% from 15 ft.

The amount of damage to pinto beans when dropped onto concrete was 3% from 5 ft., 9% from 10 ft., and 15% from 15 ft. The amount of damage to pinto beans when dropped onto other beans was 1% from 5 ft., 7% from 10 ft., and 10% from 15 ft. 

There was a difference in the amount of damage occurring between when beans are dropped onto concrete or onto other beans, but the amount of damage was high for both conditions.

Beans at 16% moisture content had less damage than beans at 13%, but it was still excessive.  This validates the need to use a bean ladder when placing beans into storage or other places where the beans might be dropped.   NDSU extension ag engineer
Ken Hellevang


 

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Northarvest Bean Growers Association | 50072 East Lake Seven Road | Frazee, MN 56544
Ph: 218-334-6351 | Fax: 218-334-6360 | Email: nhbean@loretel.net