Fecha/hora: 03/06/2024 12:46:31

Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 21/04/2017
Fecha de la última actualización: | 05/10/2017
Autoria: | BERETTA, A.; CARRASCO-LETELIER, L.
Afiliación: | ANDRES NICOLAS BERETTA BLANCO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; LEONIDAS CARRASCO-LETELIER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | USLE/RUSLE K-factors allocated through a linear mixed model for Uruguayan soils: resarch note.
Año de publicación: | 2017
Fuente/Imprenta: | Ciencia e Investigación  Agraria v. 44, n.1 ,p. 100-112, 2017.
DOI: | 10.7764/rcia.v44i1.1622
Idioma: | Español
Notas: | Article history: Received June 06, 2016.// Accepted January 17, 2017

Contenido:

Abstract: Soil erosion byrainfall is a process that demands management, both for the prevention of excessive soil erosion
and for the protection of the quality of freshwater bodies. Erosion coefficients (K-factors) of the
universal soil loss equation (USLE)/revised USLE (RUSLE) model were assigned to 99 mapped
Uruguayan soil types at 1:1,000,000 scale. This work developed a linear mixed model (LMM)
with 79 soils with assigned K-factors, in which the following variables were considered: soil
taxonomy, chemical composition, and parent material. The developed LMM had an R2=0.86,
in which the soil taxonomy (p<0.0001), parent material (p=0.0174), clay (p=0.0005) and sand
(p=0.017) contents had significant statistical effects. The prediction capacity of this model
was assessed with 10 soils not previously used in development of the LMM with assigned
K-factors. The prediction assessment had an R2=0.84 and a mean error of 9.08% of the mean
K-factor value. The LMM developed was used for the allocation of K-factors to soils mapped
at a 1:20,000-resolution. Thus, the use of LMM increased the soil area with assigned K-factors
from 111,822 km2 (at a scale of 1:1,000,000) to 174,132 km2 (1:20,000).

Palabras-Clave: | EROSIÓN DEL SUELO; PARENT MATERIAL; SOIL CHEMISTRY; SOIL CLASSIFICATION; SOIL TEXTURE.
Thesagro: | CLASIFICACIÓN DE SUELOS; QUIMICA DEL SUELO; TEXTURA DEL SUELO; URUGUAY.
Categoría del tema: | P32 Clasificación y génesis del suelo
Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (102050-1) - PXI - AP - DD -  -  -  - DIS