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Revista Ceres

versão impressa ISSN 0034-737X

Resumo

SILVA, Samuel de Assis; LIMA, Julião Soares de Souza  e  SOUZA, Gustavo Soares de. Geostatistics to determine the fertility of an oxisol under arabic coffee plantation. Rev. Ceres [online]. 2010, vol.57, n.4, pp.560-567. ISSN 0034-737X.  https://doi.org/10.1590/S0034-737X2010000400020.

The objective of this work was to evaluate the fertlity of a humic Red-Yellow Latosol under cultivation of Arabic coffee, using uni and multivariate geoestatistics. The study was carried out in an area cultivated with Coffea arabica L. var. Catuaí, in a grid area totaling 50 points. Soil samples were collected at the depth of 0 - 0.2 m and the attributes P, K, Ca, Mg, clay, sand and silt were evaluated. Data were analyzed using descriptive and exploratory statistics, and then by geoestatistics techniques. The attributes were interpolated by ordinary kriging and cokriging. The soil had, overall, low fertility. The use of sand to estimate K values led to overestimation of this nutrient in the region's highest area and underestimation in the lowest areas. Estimation of Mg as a function of silt provided a more representative map of its distribution with less error.

Palavras-chave : Coffea arabica L.; cokriging; spatial variability; soil fertility.

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