page33
33
2.1 Physical Characteristics
Interpretation
Combining the soil texture you determined or had reported from a lab (page 92) with the bulk
density you determined using the pipe sample, you will be able to determine whether or not the bulk
density of your soil is restrictive to root growth.
Bulk densities that restrict
root growth (g/cm
3
)
Sands, loamy sands, sandy loams, loams
> 1.80
Silts, sandy clay loams, clay loams
> 1.75
Silt loams, silty clay loams
> 1.65
Sandy clays, silty clays, clay loams
> 1.58
Clays
> 1.47