DISTRIBUTION AND UNCERTAINTY OF ERODIBILITY OF A HUMIC RED YELLOW OXISOL UNDER ‘ARABICA’ COFFEE CULTIVATION

• Autor(a) principal: Silva, Samuel de Assis
• Data de Publicação: 2009
• Outros Autores: Lima, Julião Soares de Souza, Teixeira, Mauri Martins
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Engenharia na Agricultura
• Texto Completo: https://periodicos.ufv.br/reveng/article/view/20

The objective of this work was to study the spatial behavior of erodibility of a humic Red Yellow Oxisol through distribution maps and uncertainty using kriging methods. The experiment was set in an area cultivated to Coffea arabica L. cv catuai. The soil was collected from 0 to 0.20 m depth, from 50 points distributed in a sampling grid. Initially, the soil erodibility was evaluated with the use of indirect models based on soil particle fractions and organic matter content. Data were initially subjected to a descriptive and exploratory analysis. Geoestatistic analysis was used on the set of real data and also on the erodibility data after codification by indication. Results were interpolated by ordinary and indicative kriging to make maps of distribution and uncertainties. The mean erodibility value was higher than tolerated for Oxisol soils, and in the major portion of the area, probability of finding erodibility values greater than 50%, was high at the higher land elevations.