Data/hora: 09/06/2024 16:33:30

Provedor de dados: | 90
País: | Brazil
Título: | State-space approach to evaluate the relation between soil physical and chemical properties
Autores: | Timm,L. C.; Reichardt,K.; Oliveira,J. C. M.; Cassaro,F. A. M.; Tominaga,T. T.; Bacchi,O. O. S.; Dourado-Neto,D.; Nielsen,D. R.
Data: | 2004-02-01
Ano: | 2004
Palavras-chave: | Spatial variability; Sugarcane crop; Kalman filter; Auto-regressive model.
Resumo: | The state-space approach is used to evaluate the relation between soil physical and chemical properties in an area cultivated with sugarcane. The experiment was carried out on a Rhodic Kandiudalf in Piracicaba, State of São Paulo, Brazil. Sugarcane was planted on an area of 0.21 ha i.e., in 15 rows 100 m long, spaced 1.4 m. Soil water content, soil organic matter, clay content and aggregate stability were sampled along a transect of 84 points, meter by meter. The state-space approach is used to evaluate how the soil water content is affected by itself and by soil organic matter, clay content, and aggregate stability of neighboring locations, in different combinations, aiming to contribute to a better understanding of the relation among these variables in the soil. Results show that soil water contents were successfully estimated by this approach. Best performances were found when the estimate of soil water content at locations i was related to soil water content, clay content and aggregate stability at locations i-1. Results also indicate that this state-space model using all series describes the soil water content better than any equivalent multiple regression equation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000100005
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832004000100005
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.28 n.1 2004
Fonte: | info:eu-repo/semantics/openAccess