10—THE VALIDITY OF PRESSURE-CORING FOR ESTIMATION OF THE CONTENT OF NOOGOORA BURR IN WOOL BALES

Abstract

Experiments are described to establish the validity of samples, for Noogoora-burr determination, taken from wool bales with pressure-coring tools. Coring tools of ¾-in. and larger diameters give unbiassed samples for the determination of both Noogoora burr and burr medic. The ½-in.-diameter tool, although previously shown to give unbiassed samples for the determination of burr medic, is subject to some bias in the sampling of bales containing Noogoora burr.

KEY WORDS (SPECIFIC TERMS):

• CORING
• ESTIMATION
• NOOGOORA BURR
• WOOL BALES
• CORES
• SAMPLING
• BURRS
• STATISTICAL ANALYSIS
• VARIANCE
• STANDARD ERROR

KEY WORDS (BROADER TERMS):

• WOOL
• VEGETABLE MATTER
• BALES
• STATISTICAL MEASURES