TABLE 4.
Yield of the RISA PCR product amplified from DNA extracted from unamended soil or farmyard manure- or sewage sludge-treated soil following three different extraction methods
| Soila | Yield of RISA PCR product (ng/μl) withb:
|
||
|---|---|---|---|
| MS laboratory method | MoBio Laboratories kit | Bio 101 kit | |
| Unamended | 61.4 ± 12.4 b | 41.0 ± 10.4 ab | 33.9 ± 7.4 a |
| Treated with: | |||
| Farmyard manure | 52.3 ± 8.6 ab | 67.3 ± 14.7 b | 61.4 ± 16.0 b |
| Sewage sludge (SS10) | 47.1 ± 4.5 ab | 63.1 ± 21.3 ab | 58.6 ± 11.8 ab |
| Sewage sludge (SS100) | 31.4 ± 8.6 a | 39.2 ± 15.6 a | 54.1 ± 4.4 ab |
a
SS10, 10 tons of dry matter/ha/yr. SS100, 100 tons of dry matter/ha/2 yr.
b
Values are means ± SE. Values followed by the same letter do not differ significantly at (P < 0.05).