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Collection and Summarization of Feed Composition Data. III. Coding of the Source Form for Summarizing Feed Composition Data

Assistant Professor and Professor of Animal Science, Utah State University, Logan; Professor of Nutrition, Macdonald College (McGill University), Province of Quebec, Canada; and Assistant Professor of Animal Science, Utah State University, Logan

ABSTRACT

A source form for the collection of feed composition data has been designed which is adapted to electronic data processing equipment. By coding this form in a prescribed manner, a variety of data manipulations and summarization control steps can be automatically accomplished.

Information contained on each source form is transferred to a series of cards, each bearing an identical six-digit assembly number punched into each card of that set. Data on the punched cards are then transferred to magnetic-tape files.

The primary sorting, summarization control, and identification number is the NRC feed-name reference number. A unique reference number identifies each of the approximately 5,700 feeds named according to the NRC nomenclature system. Secondary sorting and summarization control is attained by use of code numbers for laboratory name, date of sample collection, geographic area designations, literature references, digestibility trial data, and method of nutrient analysis. A code factor is also used in association with each nutrient datum recorded in a unit of measure other than the preferred unit. By interrogating this factor, the computer can use a designated calculation routine to convert each such datum to the preferred unit of measure before beginning summary calculations.