potash: Potash/cotton strength data
Description
An oft-cited RCBD example is an agricultural experiment which evaluates the effect of levels of of soil K$_2$O (potash) on
the breaking strength of cotton fibers (Cochran and Cox 1957). Five levels of K$_2$O were used in the soil subplots (
36, 54, 72, 108, and 144 lbs per acre) and a single sample of cotton was taken from each of five subplot.
The experiment had three blocks, and each of the K$_2$O treatments was randomly assigned to the five subplots within each block.source
Cochran, W. G. and G. M. Cox (1957) Experimental Designs (Second Edition). New York: John Wiley & Sons.