African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Chemical attributes of Oxisol under different tillage systems in Northeast of Pará

Augusto Jose Silva Pedroso*
  • Augusto Jose Silva Pedroso*
  • Programa de Pós-graduação em Agronomia, Universidade Federal Rural da Amazônia, Belém, Brazil.
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Maria de Lourdes Pinheiro Ruivo
  • Maria de Lourdes Pinheiro Ruivo
  • Coordenação de Ciências da Terra e Ecologia, Museu Paraense Emílio Goeldi, Belém, Brazil.
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Jorge Luiz Piccinin
  • Jorge Luiz Piccinin
  • Universidade Estadual Paulista, Rio Claro, Brazil.
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Ricardo Shigueru Okumura
  • Ricardo Shigueru Okumura
  • Programa de Pós-graduação em Agronomia, Universidade Federal Rural da Amazônia, Belém, Brazil.
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Sannah Mohamad Birani
  • Sannah Mohamad Birani
  • Instituto de Terras do Pará, Belém, Brazil.
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Mario Lopes da Silva Junior
  • Mario Lopes da Silva Junior
  • Instituto de Ciências Agrárias, Universidade Federal Rural da Amazônia, Belém, Brazil.
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Vania Silva de Melo
  • Vania Silva de Melo
  • Instituto de Ciências Agrárias, Universidade Federal Rural da Amazônia, Belém, Brazil.
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Adriane da Rocha Costa
  • Adriane da Rocha Costa
  • Programa de Pós-graduação em Agronomia, Universidade Federal Rural da Amazônia, Belém, Brazil.
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Marcos Paulo Ferreira de Albuquerque
  • Marcos Paulo Ferreira de Albuquerque
  • Programa de Pós-graduação em Agronomia, Universidade Federal Rural da Amazônia, Belém, Brazil.
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  •  Received: 08 September 2016
  •  Accepted: 31 October 2016
  •  Published: 08 December 2016

Abstract

The different tillage systems interfere with soil chemical attributes mainly due to the site of preparation techniques. The aim of this study was to determine, in two time evaluation periods, the changes in soil chemical attributes affected by three tillage systems in Yellow Oxissol. The experimental design consists of a randomized block design, with split-plot (Soil Tillage systems X Depths samples) with 3 repetitions in two evaluation periods (2009 and 2012). The treatments consisted of three tillage systems, being Conventional Tillage (CT); No-Tillage (NT) and Reforestation with Paricá (RP). The two depths sampled were 0-0.1 m and 0.2-0.3 m. The attributes were evaluated as pH, organic matter, macronutrients levels, exchangeable acidity and micronutrient level. The soil tillage systems significantly affected the soil chemical attributes. In the NT system, the chemical attributes Ca, Mg, MO, P, K, Mn and Zn are concentrated on the most superficial layer of the soil, whereas in the CT there is a distribution of these variables along the topsoil.

Key words: Macronutrients, conventional tillage, no-tillage, reforestation