Second Edition May 1969. Reprinted January 1979. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
New teaching techniques are the products of a wide
spectrum of research. The final test of all teaching
techniques, however derived, is their application to
a given classroom situation. The purpose of this study
is to determine whether the "principle approach", a
relatively new teaching method in agriculture, has been...
B and C horizon samples from twenty four selected profiles along
a north-south transect in the Willamette Valley were examined for
possible correlation between shrinkage properties and kind of clay
minerals present.
Observations of linear shrinkage, weight loss from a condition
of maximum plasticity, and changing character of X-ray diffraction...
Published January 1968. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog