Spatial distribution of moisture and its relation with soil texture

 

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Autores: Largaespada, Kenneth, Henríquez, Carlos
Formato: artículo original
Estado:Versión publicada
Fecha de Publicación:2015
Descripción:At Esmeralda Farm (Guácimo, Limón Province, C.R.), planted to banana cv. Valery, the spatial distribution of soil humidity, and its relationship to some physical properties, were analyzed to determine the variability between the traditional method and use of TDR (Time Domain Reflectrometer) in the determination of soil humidity. Sampling was done in a quadricuar pattern, with 36 measurement points georeferenced by GPS at 2 soil depths. At each point the volumetric soil water was measured with 3 different TDR equipments (300, MP and MT), and compared with the traditional method of volumetric humidity (VHM) determination. Soil samples were also collected, for texture analysis; with these data, a geostatistical analysis was performed and the corresponding maps were drafted. The soils, of Loam to clayey Loam texture, showed variability between TDR and these determinations regarding the MHV, regardless of depth. On the surface, the highest correlation was found between the values of MHV and TDR-300 (r=0.69), followed by TDRMT (r=0.63) and finally the TDR-MP (r=0.59). At 30 to 60 cm depth, a positive but lower ratio values was found compared MHV with TRD- 300 and TDR-MP (0.47 and 0.38, respectively); no relationship was found with TDR-MT at this depth. In terms of field moisture map, a good representation between methods was found and it can be said that this method was effective in representing the spatial variation of soil moisture.
País:Portal de Revistas UCR
Institución:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Lenguaje:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/21814
Acceso en línea:https://revistas.ucr.ac.cr/index.php/agrocost/article/view/21814
Access Level:acceso abierto
Palabra clave:Time domain reflectrometer (TDR)
physical soil properties
geostatistics
volumetric soil moisture
Reflectómetro de dominio tiempo (TDR)
propiedades físicas del suelo
geoestadística
humedad volumétrica del suelo