Spatial variability of chemical and physical attributes of dystrophic Red-Yellow Latosol in no tillage

Authors

  • João Vidal de Negreiros Neto Universidade Federal do Tocantins
  • Antonio Clementino dos Santos Universidade Federal do Tocantins
  • Analu Guarnieri Universidade Federal do Tocantins
  • Djalma Júnior de Almeida Tavares Souza Universidade Federal do Tocantins
  • Douglas José Daronch Universidade Federal do Tocantins
  • Michel Antônio Dotto Universidade Federal do Tocantins
  • Aridouglas dos Santos Araújo Universidade Federal do Tocantins

DOI:

https://doi.org/10.5433/1679-0359.2014v35n1p193

Keywords:

Geostatistics, Bulk density, Soil fertility management, Zea Mays.

Abstract

Knowledge of spatial variability in chemical and physical properties of the soil is very important, especially for precision agriculture. Geostatistics is seeking to improve techniques that can enable the correct and responsible use of soil. So during the agricultural year 2011/2012 in an area of direct planting the corn crop in the municipality of Gurupi (TO), in the Brazilian Cerrado, aimed to analyze the spatial variability of chemical and physical properties in a Typic Dystrophic tillage. Was installed sampling grid for the collection of soil, with 100 sampling points in an area of 1755m2. The contents of available phosphorus, organic matter, pH (H2O), concentrations of K +, Ca2+, Mg2+, the sum of values and base saturation (BS, V) at depths of 0-0.20 m, and resistance to penetration (RP) at depths 0-0.05 m, 0.05-0.10 m, 0.10-0.20 m and 0.20-0.40 m and bulk density (Ds). We conducted a descriptive analysis classic, with the aid of statistical software ASSISTAT, and then were modeled semivariograms for all attributes, resulting in their cross-validation and kriging maps. The chemical and physical properties of soil, except the base saturation (V), spatial dependence. Probably the discontinuity of the spatial dependence of Vvalue, is due to fertility management over the years.

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Author Biographies

João Vidal de Negreiros Neto, Universidade Federal do Tocantins

Discente do Curso de Doutorado em Produção Vegetal. Universidade Federal do Tocantins, UFT, Gurupi, TO.

Antonio Clementino dos Santos, Universidade Federal do Tocantins

Prof. da UFT, Araguaína, TO.

Analu Guarnieri, Universidade Federal do Tocantins

Discente do Curso de Mestrado em Produção Vegetal, UFT, Gurupi, TO.

Djalma Júnior de Almeida Tavares Souza, Universidade Federal do Tocantins

Discente do Curso de Mestrado em Produção Vegetal, UFT, Gurupi, TO.

Douglas José Daronch, Universidade Federal do Tocantins

Discente do Curso de Doutorado em Produção Vegetal. Universidade Federal do Tocantins, UFT. Gurupi, TO.

Michel Antônio Dotto, Universidade Federal do Tocantins

Discente do Curso de Doutorado em Produção Vegetal. Universidade Federal do Tocantins, UFT. Gurupi, TO.

Aridouglas dos Santos Araújo, Universidade Federal do Tocantins

Discente do Curso de Doutorado em Produção Animal, UFT, Araguaína, TO.

Published

2014-02-26

How to Cite

Negreiros Neto, J. V. de, Santos, A. C. dos, Guarnieri, A., Souza, D. J. de A. T., Daronch, D. J., Dotto, M. A., & Araújo, A. dos S. (2014). Spatial variability of chemical and physical attributes of dystrophic Red-Yellow Latosol in no tillage. Semina: Ciências Agrárias, 35(1), 193–204. https://doi.org/10.5433/1679-0359.2014v35n1p193

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