abd (version 0.2-6)

Truffles: Truffle Distribution

Description

Number of truffles per plot for 288 plots in an old growth forest in northeastern California.

source

Waters, J.R., K.S. McKelvey, D.L. Luoam, and C.J. Zabel. 1997. Truffle production in old-growth and mature fir stands in northeastern California. Forest Ecology and Management 96: 155-166.

References

http://www.fs.fed.us/psw/publications/watersj/waters2.PDF

Examples

data(Truffles)
Truffles
xyplot(count~truffles, Truffles, type='h', lwd=4)
barchart(count~truffles, Truffles, origin=0, horizontal=FALSE)