Lettuce: Effects of nitrogen, phosphorus and potasium on lettuce...

Description Usage Format Source

Description

The Lettuce dataset contains data from an experiment growing lettuce seedings. There are three treatment factors: nitrogen (N), phosphorus (P) and potash (K). It was arranged in three replicates, each containing three blocks, and a different set of contrasts of the N:P:K interaction was confounded with blocks within each replicate.

Usage

1

Format

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

Replicate

a factor specifying the replicates.

Block

a factor specifying the blocks.

N

a factor specifying the amount of nitrogen fertiliser.

P

a factor specifying the amount of phosphorus fertiliser.

K

a factor specifying the amount of potasium fertiliser.

Yield

a numerical vector recording the yields.

Source

Cochran, W.G. & Cox, G.M. (1957). Experimental Designs (2nd edition), page 196.


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

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