soil depths in r how to do a linear model in r how to do a lineal model in r average depth of soil r how to do linear model how to do soil models in r mri how to do a linear model in r how to do a linear model in r how to do a linear model r how to do a linear model how to do a linear model in r when is r best used to calculate soil temperature how to do a linear model in r when irrigated with waste water how deep how many cubic meters in a field with treated effluent how deep does a soil need to be before fitting in how to do a linear model in r which method is best for linear modelling how to plot soil depths in r r model how long is soil good for