TY  - JOUR 
T1  - Implications of the variability in soil penetration resistance for statistical analysis
JO  - Revista Brasileira de Ciência do Solo
A1  - Gubiani, Paulo Ivonir
A1  - Reichert, José Miguel
A1  - Reinert, Dalvan José
A1  - Gelain, Neiva Somavilla
SN  - 0100-0683
UL  - 10.1590/S0100-06832011000500003
VL  - 35 
Y1  - 2011
PB  - Brasil 
ER  -