TABLE 3.

Comparison of soil RNPs under selective versus standard conditions

RNP comparisonMean RNPselective/RNP° ratio (SD)a
Pasture soilCropped soilFallowed soil
40°C vs 30°Cb1.0 (0.1)e0.0 (0)**0.9 (0.1)
+ or − 100 μM ATUc0.5 (0.2)**0.0 (0)**0.0 (0)**
+ or − NH4+d0.8 (0.2)0.1 (0.1)**0.4 (0.2)**
  • a RNPselective represents the specific treatment indicated. RNP° indicates standard conditions. **, RNP° significantly different from RNPselective (P < 0.01).

  • b Performed with 1 mM supplemental NH4+.

  • c Performed with a 30°C incubation temperature with 1 mM supplemental NH4+.

  • d Performed with a 30°C incubation temperature.

  • e Standard deviations of the means of data from three field replicates are shown in parentheses.