Data/hora: 15/06/2024 15:16:16

Provedor de dados: | 63
País: | Brazil
Título: | Calibration of a capacitance probe in a Paleudult
Autores: | Silva,Cláudio Ricardo da; Andrade Júnior,Aderson Soares de; Alves Júnior,José; Souza,Antonio Barros de; Melo,Francisco de Brito; Coelho Filho,Maurício Antonio.
Data: | 2007-12-01
Ano: | 2007
Palavras-chave: | FDR probe; Sensor; Irrigation; Soil water content.
Resumo: | The use of capacitance sensors is one of the methods used to quantitatively measure soil water contents (theta, m³ m-3). Sensors provide readings at desired depths and time intervals. A capacitance probe (Diviner 2000) was calibrated for a Rhodic Paleudult from the Piaui State, Brazil. Six access tubes were installed in a 5 × 2 m grid arrangement. Three moisture levels (saturated, moist and dry) were used in two replications. Probe readings and soil samplings to determine theta were made at 0.1 m depth intervals down to a depth of 1.0 m. A power calibration equation was developed for each depth as well as for the entire soil profile (Root Mean Square Error = 0.014, R² = 0.93) for a theta range of 0.068 to 0.264 m³m-3. A separate calibration for each depth improves the correlation coefficient and minimizes RMSE. Site-specific calibration improves the accuracy for soil water monitoring.
Tipo: | Info:eu-repo/semantics/report
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600012
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162007000600012
Formato: | text/html
Fonte: | Scientia Agricola  v.64 n.6 2007
Fonte: | info:eu-repo/semantics/openAccess