TABLE 1.
Properties of the soils used in this investigation
| Soil | Soil texture | Particle size distribution (%)
|
Moisture content (%) | pH (H2O) | % C | % N | N-NO3− concn (μg/g)a | N-NH4+ concn (μg/g)a | TPH concn (μg/g)b | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sand | Silt | Clay | |||||||||
| Agricultural | Loam | 8 | 80 | 12 | 11 | 7.4 | 1.2 | 0.14 | 6.5 | <1.0 | NDc |
| Polluted | Loam | 15 | 63 | 22 | 9 | 8.2 | 1.28 | 0.05 | <0.5 | <1.0 | 2,500–4,000 |
a
Determined on a dry weight basis.
b
The total petroleum hydrocarbon (TPH) content was determined on a dry weight basis by using infrared spectroscopy.
c
ND, not detected.