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New Techniques for Recording DHIA Data under Field Conditions^{1, 2,}

Department of Dairy Husbandry University of Wisconsin, Madison

ABSTRACT

Electronic computers and related peripheral punch-card equipment are in common use in the machine processing of DHIA records. Approximately 38% (150,000) of the DHIA cows in Wisconsin are presently enrolled in machine processing. This system requires the key-punching and verification of data reported from the field each month and is a costly operation. At the Wisconsin Agricultural Records Cooperative, from 20 to 24% of the total machine processing cost, or approximately 2.0¢/cow/month, is attributed to key-punching and verification. This study was made in an attempt to determine the feasibility of using other methods of assembling data for machine processing.

Recording data by mark sensing has been widely used by many industries. This system requires the use of a mark-sense card, an electrostatic pencil, and a mark-sense device in an IBM reproducer. More recently, the method of port-a-punching was introduced and used successfully in certain industries. This system requires a port-a-punch card, board, and punch, and differs from mark sensing in that punches rather than marks are originally recorded.

¹ Contributions from the Dairy Cattle Research Branch, USDA, Beltsville, Md., and from Wisconsin's Agricultural Records Cooperative.

² Approved for publication by the Director of the Experiment Station, University of Wisconsin, Madison.

³ Present address, Dodge County Dairy Agent, Juneau, Wisconsin.