ca20: Calcium content in soil samples
In geoR: Analysis of Geostatistical Data
ca20 R Documentation
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.
The first region is typically 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
fertilisers a while ago and is typically occupied by rice fields.
The third region has received fertilisers recently and is frequently
used as an experimental area.
Usage
data(ca20)
Format
The object ca20 belongs to the class geodata
and is a list
with the following elements:
coordsa matrix with the coordinates of the soil samples.
datacalcium content measured in mmol_c/dm^3.
covariatea data-frame with the covariates
altitudea vector with the elevation of each
sampling location, in meters (m).
areaa factor indicating the sub area to which the
locations belongs.
bordersa matrix with the coordinates defining the
borders of the area.
reg1a matrix with the coordinates of the limits of
the sub-area 1.
reg1a matrix with the coordinates of the limits of
the sub-area 2.
reg1a matrix with the coordinates of the limits of
the sub-area 3.
Source
The data was collected by researchers from PESAGRO and EMBRAPA-Solos, Rio
de Janeiro, Brasil
and provided by Dra. Maria Cristina Neves de Oliveira.
Capeche, C.L.; Macedo, J.R.; Manzatto, H.R.H.; Silva, E.F. (1997)
Caracterização pedológica da fazenda Angra - PESAGRO/RIO -
Estação experimental de Campos (RJ). (compact disc).
In: Congresso BRASILEIRO de Ciência do Solo. 26.,
Informação, globalização, uso do solo; Rio de Janeiro, 1997.
trabalhos. Rio de Janeiro: Embrapa/SBCS.
References
Oliveira, M.C.N. (2003) Métodos de estimação de parâmetros
em modelos geoestatísticos com diferentes estruturas de
covariâncias: uma aplicação ao teor de cálcio no solo.
Tese de Doutorado, ESALQ/USP/Brasil.
Further information on the package geoR can be found at:
http://www.leg.ufpr.br/geoR/.
geoR documentation built on May 29, 2024, 1:36 a.m.
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| ca20 | R Documentation |
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.
The first region is typically 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 fertilisers a while ago and is typically occupied by rice fields. The third region has received fertilisers recently and is frequently used as an experimental area.
Usage
data(ca20)Format
The object ca20 belongs to the class geodata
and is a list
with the following elements:
coordsa matrix with the coordinates of the soil samples.
datacalcium content measured in
mmol_c/dm^3.covariatea data-frame with the covariates
altitudea vector with the elevation of each sampling location, in meters (
m).areaa factor indicating the sub area to which the locations belongs.
bordersa matrix with the coordinates defining the borders of the area.
reg1a matrix with the coordinates of the limits of the sub-area 1.
reg1a matrix with the coordinates of the limits of the sub-area 2.
reg1a matrix with the coordinates of the limits of the sub-area 3.
Source
The data was collected by researchers from PESAGRO and EMBRAPA-Solos, Rio de Janeiro, Brasil and provided by Dra. Maria Cristina Neves de Oliveira.
Capeche, C.L.; Macedo, J.R.; Manzatto, H.R.H.; Silva, E.F. (1997) Caracterização pedológica da fazenda Angra - PESAGRO/RIO - Estação experimental de Campos (RJ). (compact disc). In: Congresso BRASILEIRO de Ciência do Solo. 26., Informação, globalização, uso do solo; Rio de Janeiro, 1997. trabalhos. Rio de Janeiro: Embrapa/SBCS.
References
Oliveira, M.C.N. (2003) Métodos de estimação de parâmetros em modelos geoestatísticos com diferentes estruturas de covariâncias: uma aplicação ao teor de cálcio no solo. Tese de Doutorado, ESALQ/USP/Brasil.
Further information on the package geoR can be found at:
http://www.leg.ufpr.br/geoR/.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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