populavolplots {datana}

A population of forest sample plots.

Description

Tree standing volume in 576 contiguous 10m*10m square plots. Thus, the population covers 5.76 hectares. The data came from a 22 years-old radiata pine plantation near Valdivia, Chile.

Usage

data(populavolplots)

Format

Data has a single column:

y

Stand volume of the sample plot, in m^{3}. Therefore, the volume in m^{3}/ha can be obtained by multiplying this value by the expansion factor (100).

Source

The data were typed by Natalia Pizarro, Javiera Zuñiga and Jose Osses, all of them students of Prof Christian Salas-Eljatib.

References

Wrann JH. 1970. Efectividad de los distintos sistemas de muestreo y metodos de calculo en el inventario de un rodal de pino insigne. Tesis Ingeniero Forestal, Universidad Austral de Chile, Valdivia, Chile. 51p.

Examples

data(populavolplots)
summary(populavolplots$volume)
hist(populavolplots$volume)