2.2. Statistical Methods
Statistical analyses for all parameters were performed using the procedures from Statistical Analysis System
(SAS) computer software [16]. Analysis of variance and least square means of crop yield, plant population, SOC
and bulk density variables were performed by General Linear Model (GLM) procedures. An LSD procedure was
used at the P = 0.05 level to determine if there were significant SOC differences between cover crop treatments
on each tillage system for the same date and depth.