TABLE 4.

Principal component factor analysis (varimax rotation) of disease rating of wheat treated with Phz+ derivatives of P. fluorescens 2-79 and soil propertiesa

Soil propertyValue for:
Component 1Component 2Component 3
Disease rating−0.710.63NS
Soil pHNS−0.91NS
Organic matter (%)NS0.410.84
Ammonium-nitrogen0.47NS0.82
Sulfate-sulfur0.92NSNS
Sodium (extractable)0.63−0.55NS
Cation exchange capacity−0.460.620.43
Exchangeable acidity−0.390.730.55
Zinc0.74NSNS
ManganeseNS0.79NS
IronNS0.86NS
Sand (%)0.84−0.40NS
Silt (%)−0.89NSNS
Clay (%)−0.360.74NS
Sodium (soluble)0.81NSNS
Nitrogen (total %)NSNS0.85
Carbon (total %)NS0.400.85
    Variance0.640.150.08
    Cumulative variance0.640.790.87
  • a Loading values greater than or equal to the absolute value 0.35 indicates significant inter-relatedness within a component; NS, not significant. Phz+ derivatives of P. fluorescens 2-79 are 2-79RN10, 2-79RNL3, and 2-79-59.34. Phz+, produces PCA.