Moist and Temp level columns are added to posDF
minor change
object names are modified
The fig with Temp_Mean on x axis seems better
moist levels
moisture range plot is horizontally shown
plot predicted values for ammonium
predict val plot for nitrate
final model of ancova is stored
three variables are plotted in the same graph
variable is added to plot altogether
all variables are plotted together
xaxis tick position and labels are updated
load lines are added