Papers

Spatial variability of chemical attributes in kandiustalf cultivated with Rubber tree.

Author: Cassiano Garcia Roque, José Frederico Centurion, Gener Tadeu Pereira, Amauri Nelson Beutler, Onã Da Silva Freddi e Itamar Andrioli

Keywords: geoestatistical, semivariograms, Hevea brasiliensis.

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Summary

This study objectived evaluate the spatial variability of chemical soil attributes in Yellow Red Argisol (Kandiustalf) cultivated with rubber tree PB 235 and RRIM 600. Soil samples were collected in the layers of 0.00-0.20 and 0.60-0.80 m for determination of pH, MO, P, K, Ca, Mg and calculated V%. The results were submitted to descriptive statistics procedures and spatital dependence was verified through semvariograms. The P, K, Ca and Mg presented the greater variabilities, analyzed by variation coefficient. More uniform spatial distribution was verified in layer of 0.00-0.20m, being that grid with RRIM 600 clone was more uniform that PB 235 clone. The spatial continuity of chemical attributes was greater in greater declivity.