Spatial variability of chemical attributes in an Ultisol under pasture - DOI: 10.4025/actasciagron.v30i4.5322

• Autor(a) principal: Souza, Gustavo Soares
• Data de Publicação: 2008
• Outros Autores: Lima, Julião Soares de Souza, Silva, Samuel de Assis, Oliveira, Rone Batista de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5322
• topic: spatial dependence; geostatistics; kriging; dependência espacial; geoestatística; krigagem.

Studies show the importance of knowing the variability of soil attributes for a more efficient management. This work was carried out to evaluate the spatial variability of the chemical attributes of an Ultisol, cultivated with Brachiaria decumbens pasture in Alegre - ES. Soil samples were collected at a depth of 00-0.2 m, at the crossing points of a regular grid with 10 m-intervals, comprising a total of 64 points. Data were submitted to descriptive statistics, geostatistics and kriging interpolation analysis. The coefficient of variation was low for pH, high for Al and m%, and medium the other attributes. The attributes pH, P, H+Al and m% presented strong dependence, and the other moderate dependence. The attributes presented a spatial dependence structure, allowing their mapping by geostatistics techniques.