Potatoes: Effects of nitrogen, potasium and dung on yields of potatoes

Description Usage Format Source

Description

The Potatoes dataset contains data from an experiment that used a randomized-block design to study the effects of nitrogen (N), potassium (K) and dung (D) on the yield of a potato crop. The blocks each had only four plots. So the N:K:D interaction was confounded in blocks 1 and 2, N:K was confounded in blocks 3 and 4, N:D was confounded in blocks 5 and 6, and K:D was confounded in blocks 7 and 8. The response variable is the yield of potatoes.

Usage

1

Format

A data frame with 32 observations on the following six variables:

Blocks

a factor specifying the blocks.

Plots

a factor specifying plots within blocks.

N

a factor specifying the amount of nitrogen fertiliser.

K

a factor specifying the amount of potasium fertiliser.

D

a factor specifying the amount of dung.

Yield

a numerical vector recording the yields.

Source

Yates, F. (1937) Design and Analysis of Factorial Experiments, page 21; also see John, P.W.M. (1972) Statistical Design and Analysis of Experiments, page 135.


VSNC/vsnc documentation built on May 28, 2019, 3:20 p.m.