SOYBEAN YIELD AND MECHANICAL RESISTANCE TO SOIL PENETRATION UNDER NO-TILLAGE IN THE BRAZILIAN SAVANNAH

Authors

  • Flávio Carlos Dalchiavon UNESP
  • Morel de Passos Carvalho UNESP
  • Débora Cristiane Nogueira UNESP
  • Daniele Romano UNESP
  • Fabiana Lima Abrantes UNESP
  • Juliana Teodora de Assis UNESP
  • Mário Sérgio de Oliveira UNESP

Keywords:

Glycine max, soybean production components, precision agriculture, soil management, cone index

Abstract

The mechanical resistance to soil penetration can be a negative influence to soybean root growth, greatly affecting its yield. In the agricultural year 2008/2009, in Selvíria, Mato Grosso do Sul State, in the Brazilian Savannah, the soybean yield was analyzed in relation to the mechanical resistance to soil penetration, in a Dystropherric Red Latosol (Typic Acrustox) under no-tillage. The main purpose was to select, among the soil attributes, the one that best presented spatial and linear correlation to explain the soybean yield variability. A geostatistical grid was installed to collect the soil and plant data, with 120 sampling points, in an area of 8.34 ha and homogeneous slope of 0.055 m m-1. Thus, in order to support future researches concerning precision agriculture, based on the same soil’s attributes used for this study, the values for spatial dependence range should be placed between 38.1 m and 114.7 m. From the linear point of view, the mechanical resistance to soil penetration, when evaluated in the 0.10-0.20 m layer, showed good inverse exponential correlation with the soybean yield. However, from the spatial point of view, the number of pods per plant showed to be a good indicator for soybean yield.

KEY-WORDS: Glycine max, soybean production components; precision agriculture; soil management; cone index.

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Published

2011-01-21

How to Cite

DALCHIAVON, F. C.; CARVALHO, M. de P.; NOGUEIRA, D. C.; ROMANO, D.; ABRANTES, F. L.; ASSIS, J. T. de; OLIVEIRA, M. S. de. SOYBEAN YIELD AND MECHANICAL RESISTANCE TO SOIL PENETRATION UNDER NO-TILLAGE IN THE BRAZILIAN SAVANNAH. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 41, n. 1, p. 8–19, 2011. Disponível em: https://revistas.ufg.br/pat/article/view/8351. Acesso em: 25 dec. 2024.

Issue

v. 41, n. 1, Jan./Mar. 2011

Section

Soil Science

License

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