Cereal Chem 43:284 - 296.  |  VIEW ARTICLE

Sources of Variability in Laboratory Milling Yields of Long-Grain Rice-Drying Experiments.

E. F. Schultz, Jr., J. Pominski, and T. Wasserman. Copyright 1966 by the American Association of Cereal Chemists, Inc. 

Experiments were conducted to determine sources and magnitudes of components of variance, sigma2, affecting laboratory head yields of long-grain rice-drying experiments. Since interest centers on the difference between head yields of entering green rice and final-product dried rice, any variability due to days of milling and operator can be eliminated from experimental comparisons by the simple technique of saving early samples from a given drying run and evaluating all samples from such a run on the same day and by the same operator. The variance of head-yield changes is decreased faster by increased replication from more intensive sampling of the process stream than from any other form of increased replication.