The aim of this work was to analyze the spatial distribution of soil compaction and the influence... more The aim of this work was to analyze the spatial distribution of soil compaction and the influence of soil water content on the resistance to penetration. The latter variable was described by the cone index. The soil at the study site was a Nitisol and the cone index data were obtained using a penetrometer. Soil resistance was assessed at 5 different depths, i.e. 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm and deeper than 40 cm, whereas soil water content was measured at 0-20 cm and 20-40 cm. Soil water conditions varied during the different samplings. Coefficients of variation for cone index ranged from 16.5% to 45.8% while those for soil water content varied from 8.96% to 21.38%. Results suggested a high correlation between soil resistance, as assessed by the cone index, and soil depth. However, the expected relation with soil water content was not observed. Spatial dependence was observed in 31 out of 35 data series, both cone index and soil water content. This structure was fitted to exponential models with nugget effect varying from 0 to 90% of the sill value. Four of the data series showed a random behaviour. Inverse distance technique was used in order to map the distribution of the variables when no spatial structure was observed. Ordinary kriging showed a smoothing of the maps compared to those from inverse distance weighing. Indicator kriging was used to map the cone index spatial distribution for recommendation of further soil management.
O café além de ocupar grandes áreas agrícolas no Brasil, utiliza mecanização intensiva, capaz de ... more O café além de ocupar grandes áreas agrícolas no Brasil, utiliza mecanização intensiva, capaz de degradar fisicamente o solo. Assim, esta pesquisa objetivou criar um banco de dados e estudar a variabilidade da permeabilidade do solo à água e os níveis de ...
Page 1. 11 RFO UPF 2006; 11(2):11-15 Resumo * Aluna do curso de mestrado em Reabilitação Oral pel... more Page 1. 11 RFO UPF 2006; 11(2):11-15 Resumo * Aluna do curso de mestrado em Reabilitação Oral pela Faculdade de Odontologia da UFU-MG. ** Doutor em Anatomia Humana. Professor Doutor de Anatomia Humana do Instituto de Ciências Biomédicas da UFU-MG. ...
O café é o produto agrícola de maior contribuição para a economia brasileira. A expansão da cafei... more O café é o produto agrícola de maior contribuição para a economia brasileira. A expansão da cafeicultura no cerrado ocorre com investimentos elevados em variedades, adubações e irrigações. Pesquisas da qualidade do ambiente do solo, com mapeamento ...
The aim of this work was to analyze the spatial distribution of soil compaction and the influence... more The aim of this work was to analyze the spatial distribution of soil compaction and the influence of soil water content on the resistance to penetration. The latter variable was described by the cone index. The soil at the study site was a Nitisol and the cone index data were obtained using a penetrometer. Soil resistance was assessed at 5 different depths, i.e. 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm and deeper than 40 cm, whereas soil water content was measured at 0-20 cm and 20-40 cm. Soil water conditions varied during the different samplings. Coefficients of variation for cone index ranged from 16.5% to 45.8% while those for soil water content varied from 8.96% to 21.38%. Results suggested a high correlation between soil resistance, as assessed by the cone index, and soil depth. However, the expected relation with soil water content was not observed. Spatial dependence was observed in 31 out of 35 data series, both cone index and soil water content. This structure was fitted to exponential models with nugget effect varying from 0 to 90% of the sill value. Four of the data series showed a random behaviour. Inverse distance technique was used in order to map the distribution of the variables when no spatial structure was observed. Ordinary kriging showed a smoothing of the maps compared to those from inverse distance weighing. Indicator kriging was used to map the cone index spatial distribution for recommendation of further soil management.
O café além de ocupar grandes áreas agrícolas no Brasil, utiliza mecanização intensiva, capaz de ... more O café além de ocupar grandes áreas agrícolas no Brasil, utiliza mecanização intensiva, capaz de degradar fisicamente o solo. Assim, esta pesquisa objetivou criar um banco de dados e estudar a variabilidade da permeabilidade do solo à água e os níveis de ...
Page 1. 11 RFO UPF 2006; 11(2):11-15 Resumo * Aluna do curso de mestrado em Reabilitação Oral pel... more Page 1. 11 RFO UPF 2006; 11(2):11-15 Resumo * Aluna do curso de mestrado em Reabilitação Oral pela Faculdade de Odontologia da UFU-MG. ** Doutor em Anatomia Humana. Professor Doutor de Anatomia Humana do Instituto de Ciências Biomédicas da UFU-MG. ...
O café é o produto agrícola de maior contribuição para a economia brasileira. A expansão da cafei... more O café é o produto agrícola de maior contribuição para a economia brasileira. A expansão da cafeicultura no cerrado ocorre com investimentos elevados em variedades, adubações e irrigações. Pesquisas da qualidade do ambiente do solo, com mapeamento ...
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