Video Trashmeters in Grading Cotton

Fred S. Mullins


The Cotton Division utilized video trashmeters in its classing programs during the 1987, 1988 and 1989 crop years. Extensive use was made of trashmeters in classing the 1989 crop. The expanded use of trashmeters in recent years has provided substantial data for evaluating their accuracy and repeatability. The unit of measurement used is percent area of trash on the sample surface. Readings are based on four measurements per sample. Quality control is provided through an in-house check system using known value cottons and by submitting randomly selected samples to the Quality Control Section for retesting. Each trashmeter must pass precision and accuracy performance testing before it is accepted from the vendor and/or before it is put into use each season. Repeatability has averaged 70 percent or higher within plus or minus 0.1 unit between classing offices and the Quality Control Section during the past two seasons.

Reprinted from 1990 Proceedings: Beltwide Cotton Production Research Conferences pp. 566 - 568
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998