dataca20 {OBASpatial}

Calcium Content In Soil Samples.

Description

This data set contains the calcium content measured in soil samples taken from the 0-20cm layer at 178 locations within a certain study area divided in three sub-areas. The elevation at each location was also recorded.See geoR package for details.

Usage

data("dataca20")

Format

A data frame with 178 observations on the following 3 variables.

east

X Coordinate.

north

Y coordinate.

calcont

Calcium content measured in mmol_c/dm^3.

altitude

A vector with the elevation of each sampling location,in meters.

area

A factor indicating the sub area to which the locations belongs.

References

Oliveira, M. C. N. (2003). Metodos de estimacao de parametros em modelos geoestatisticos com diferentes estruturas de covariancias: uma aplicacao ao teor de calcio no solo. Ph.D. thesis, ESALQ/USP/Brasil.