TY  - JOUR 
T1  - Intelligent instrument to facilitate decision making in the evaluation of soil resistance to root penetration
JO  - Scientia Agricola
A1  - Rabello, Ladislau Marcelino
A1  - Cruvinel, Paulo Estevão
SN  - 0103-9016
UL  - 10.1590/S0103-90162009000500001
VL  - 66 
Y1  - 2009
PB  - Brasil 
ER  -