Earthwormbiomass


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?


datasets

Collection of datasets as prepared by Profs. A.P. Gore, S.A. Paranjape, and M.B. Kulkarni of Department of Statistics, Poona University, India. With their permission, first letter of their names forms the name of this package, the package has been built by me and made available for the benefit of R users. This collection requires a rich class of models and can be a very useful building block for a beginner.

Prabhanjan Tattar

100 Data Sets for Statistics Education

Earthwormbiomass function

A data frame with 12 observations on the following 5 variables.
  <dl>
    <dt><code>Density</code></dt><dd>a numeric vector</dd> <dt><code>Biomass</code></dt><dd>a numeric vector</dd> <dt><code>Crop</code></dt><dd>a factor with levels <code>Maize</code> <code>Paddy and Pulses</code> <code>Wheat and Mustard</code></dd> <dt><code>Year</code></dt><dd>a numeric vector</dd> <dt><code>Soil</code></dt><dd>a factor with levels <code>0-10 </code> <code>10-20 </code></dd> </dl> 

Format

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

Earthwormbiomass: Earthworms in cultivated soils

Description

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Examples