Earthwormbiomass {gpk}

Earthworms in cultivated soils

Description

Earthworms are known to play an important role in farming by improving soil fertility. They enhance physical, chemical and biological aspects of soil fertility. Hence understanding their population dynamics is important. In one of the studies on earthworms in cultivated soils, over 2000 individual worms belonging to 6 species were collected. Samples were collected from three crops for two consecutive years. Questions of interest are: a) What are the factors affecting density of the earthworms? b) What are the factors affecting biomass of the earthworms?

Usage

data(Earthwormbiomass)

Format

A data frame with 12 observations on the following 5 variables.

Density

a numeric vector

Biomass

a numeric vector

Crop

a factor with levels Maize Paddy and Pulses Wheat and Mustard

Year

a numeric vector

Soil

a factor with levels 0-10 10-20

Details

Consider a generalized linear model!

Source

http://ces.iisc.ernet.in/hpg/nvjoshi/statspunedatabook/databook.html

Examples

data(Earthwormbiomass)