TY - JOUR
T1 - Interpolation of mexican soil properties at a scale of 1:1,000,000
AU - Cruz-Cárdenas, Gustavo
AU - López-Mata, Lauro
AU - Ortiz-Solorio, Carlos Alberto
AU - Villaseñor, José Luis
AU - Ortiz, Enrique
AU - Silva, José Teodoro
AU - Estrada-Godoy, Francisco
N1 - Funding Information:
The first author thanks the UNAM (Universidad Nacional Autónoma de México) for the fellowship granted in its DGAPA (Dirección General de Asuntos del Personal Académico) 2010 Postdoctoral Fellowships Program. The Biology Institute of UNAM provided human and material resources to carry out this research.
PY - 2014/1
Y1 - 2014/1
N2 - México maintains several databases with biotic or abiotic information that enable large scale-studies (for example, at a resolution of 1km2); unfortunately, there is no information at this resolution for soil properties. The goal of this paper was to generate a set of soil variables to address this absence. We evaluated 4400 soil samples taken on Mexican territory. The following nine soil properties were evaluated for each sample: Ca, K, Mg, Na, organic C, organic matter, electrical conductivity, sodium absorption ratio, and pH. With the use of geostatistical methods, a layer was generated for each soil property after six different semivariance models were evaluated. The kriging model (simple, ordinary, or universal) was selected as the best semivariance method with a 10-fold cross-validation approach. Exponential, pentaspherical, and spherical models were selected with ordinary and universal kriging methods to spatially predict the soil properties. Five classes for each soil map were generated. The nine soil properties were classified primarily as slightly low or medium according to their distribution throughout Mexican territory.
AB - México maintains several databases with biotic or abiotic information that enable large scale-studies (for example, at a resolution of 1km2); unfortunately, there is no information at this resolution for soil properties. The goal of this paper was to generate a set of soil variables to address this absence. We evaluated 4400 soil samples taken on Mexican territory. The following nine soil properties were evaluated for each sample: Ca, K, Mg, Na, organic C, organic matter, electrical conductivity, sodium absorption ratio, and pH. With the use of geostatistical methods, a layer was generated for each soil property after six different semivariance models were evaluated. The kriging model (simple, ordinary, or universal) was selected as the best semivariance method with a 10-fold cross-validation approach. Exponential, pentaspherical, and spherical models were selected with ordinary and universal kriging methods to spatially predict the soil properties. Five classes for each soil map were generated. The nine soil properties were classified primarily as slightly low or medium according to their distribution throughout Mexican territory.
KW - Geostatistics
KW - Kriging
KW - Soil properties
KW - Spatial databases
UR - http://www.scopus.com/inward/record.url?scp=84883042577&partnerID=8YFLogxK
U2 - 10.1016/j.geoderma.2013.07.014
DO - 10.1016/j.geoderma.2013.07.014
M3 - Artículo
SN - 0016-7061
VL - 213
SP - 29
EP - 35
JO - Geoderma
JF - Geoderma
ER -