cane:
Sugar-cane Disease Data
Description
The cane data frame has 180 rows and 5 columns.
The data frame represents a randomized
block design with 45 varieties of sugar-cane and 4 blocks.Format
This data frame contains the following columns:
n-
The total number of shoots in each plot.
r-
The number of diseased shoots.
x-
The number of pieces of the stems, out of 50, planted in each plot.
var-
A factor indicating the variety of sugar-cane in each plot.
block-
A factor for the blocks.
Source
The data were kindly supplied by Dr. C.G.B. Demetrio of Escola
Superior de Agricultura, Universidade de Sao Paolo, Brazil.Details
The aim of the experiment was to classify the varieties into
resistant, intermediate and susceptible to a disease called "coal of
sugar-cane" (carvao da cana-de-acucar). This is a disease that is
common in sugar-cane plantations in certain areas of Brazil.
For each plot, fifty pieces of sugar-cane stem were put in a solution
containing the disease agent and then some were planted in the plot.
After a fixed period of time, the total number of shoots and the number
of diseased shoots were recorded.
References
Davison, A.C. and Hinkley, D.V. (1997)
Bootstrap Methods and Their Application. Cambridge University Press.