MACHINE TRAFFIC AND SOIL PENETRATION RESISTANCE IN GUAVA TREE ORCHARDS

Authors

  • Wilson José Oliveira de Souza Department of Agronomy, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Registro, SP http://orcid.org/0000-0002-0722-255X
  • Danilo Eduardo Rozane Department of Agronomy, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Registro, SP http://orcid.org/0000-0003-0518-3689
  • Henrique Antunes de Souza Center of Agricultural Research of the Mid North, Empresa Brasileira de Pesquisa Agropecuária, Teresina, PI http://orcid.org/0000-0002-2209-4285
  • William Natale Center Agrarian Sciences, Universidade Federal do Ceará, Fortaleza, CE http://orcid.org/0000-0001-9572-4463
  • Paulo André Fernandes dos Santos Department of Agronomy, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Registro, SP http://orcid.org/0000-0002-9878-1284

DOI:

https://doi.org/10.1590/1983-21252018v31n421rc

Keywords:

Psidium guajava L.. Precision agriculture. Soil compacting. Mechanized agriculture.

Abstract

The study was conducted in irrigated commercial orchards of ‘Paluma’ and ‘Pedro Sato’ guavas, which were mapped with a Garmin GPS unit (Cx60). Sixty five sampling points were marked on a 21 x 21 m sampling grid. Gravimetric humidity and soil penetration resistance (SPR) were evaluated with the help of an automated penetrometer rod with a type 3 cone at a 45º angle (maximum SPR 15,100 kPa). Data with non-normal distribution were analyzed by geostatistics and interpolation by ordinary kriging. SPR values were higher where machine traffic occurs than on the lines where the crop is planted. There was spatial variability of the SPR among the layers evaluated, with the layer between 0.10-0.20 m, on the line of the machine traffic, presenting a higher SPR (>4000 kPa).

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Published

17-10-2018

Issue

Section

Agricultural Engineering