camg

0th

Percentile

Calcium and magnesium content in soil samples

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.

The first region is tipically flooded during the rain season and not used as an experimental area. The calcium levels would represent the natural content in the region. The second region has received fertilizers a while ago and is tipically occupied by rice fields. The third region has recieved fertilizers recently and is frequently used as an experimental area.

Keywords
datasets
Usage
data(camg)
Details

More details about this data-set, including coordinates of the region and sub-region borders can be found in the data object ca20.

Format

A data frame with 178 observations on the following 10 variables.

east

east-west coordinates, in meters.

north

north-south coordinates, in meters.

elevation

elevation, in meters

region

a factor where numbers indicate different sub-regions within the area

ca020

calcium content in the 0-20cm soil layer, measured in \(mmol_c/dm^3\).

mg020

calcium content in the 0-20cm soil layer, measured in \(mmol_c/dm^3\).

ctc020

calcium content in the 0-20cm soil layer.

ca2040

calcium content in the 20-40cm soil layer, measured in \(mmol_c/dm^3\).

mg2040

calcium content in the 20-40cm soil layer, measured in \(mmol_c/dm^3\).

ctc2040

calcium content in the 20-40cm soil layer.

Aliases
  • camg
Examples
# NOT RUN {
plot(camg[-(1:2),])
mg20 <- as.geodata(camg, data.col=6)
plot(mg20)
points(mg20)
# }
Documentation reproduced from package geoR, version 1.8-1, License: GPL (>= 2)

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