SPATIAL VARIABILITY OF FERTILITY ATTRIBUTES IN A ENTISOL TYPIC THROUGH THE REPLACEMENT OF THE CERRADO FOR GRASSLAND

Authors

  • Sabino Pereira da Silva Neto
  • Antonio Clementino dos Santos
  • José Expedito Cavalcante da Silva

DOI:

https://doi.org/10.13083/reveng.v19i4.182

Keywords:

Análise espacial, geoestatística, krigagem, manejo do solo, variograma

Abstract

The chemical characteristics of soils in the Brazilian Cerrado are easily changed by human interventions. The aim of this study was to evaluate the spatial variability of chemical properties in Entisol Typic due to Cerrado cleaning substited by pasture in the region of Araguaina (TO), Brazil. Samples were taken in an irregular grid in an area of 13.11 ha, in the depth of 0 to 20 cm, to determine the levels of organic matter (OM), Al3+, P, K+, Ca2+, Mg2+ and pH values, sum of bases (SB), capacity cation exchange to pH 7.0 (CECpH 7), ability to effective cation exchange (CECe), base saturation (V%) and aluminum saturation (m%). The soil chemical properties were analyzed using descriptive statistics and had average compared by the Tukey test, at 5% probability, using geostatistics and interpolated by ordinary kriging. The ranges of spatial dependence of the chemical variables pH and Ca2+ in the soil were lower than the others (OM, Al3+, P, K+, Mg2+, SB, CTCpH7, , CECe and V%), indicating that they have a smaller continuity in the spatial distribution in Entisol Typic depending on the conversion of the Cerrado grasslands.

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Published

2011-09-01

How to Cite

da Silva Neto, S. P., dos Santos, A. C., & Silva, J. E. C. da. (2011). SPATIAL VARIABILITY OF FERTILITY ATTRIBUTES IN A ENTISOL TYPIC THROUGH THE REPLACEMENT OF THE CERRADO FOR GRASSLAND. Engineering in Agriculture, 19(4), 334–347. https://doi.org/10.13083/reveng.v19i4.182

Issue

Vol. 19 No. 4 (2011)

Section

Water and environmental resources

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