Agriculture Reference
In-Depth Information
Table 1. Distribution of bacterial isolates of the predominant aerobic, heterotrophic,
culturable species identified by fatty acid methyl ester (FAME) profiles from
microaggregates of various tillage and irrigation systems collected at 0-5 cm depth
before planting (spring) and assessment of their ability to aggregate soil using an
in vitro
soil sedimentation assay
a
Management practices: barley no-till irrigated (BNTirr) and non-irrigated (BNTnirr); barley
till-irrigated (BTirr) and non-irrigated (BTnirr); CRP no-till irrigated (CRPNTirr) and
non-irrigated (CRPNTnirr).
b
Bacterial and soil suspensions were mixed and reflected images were captured after 5 minutes. Images
were calibrated by referring white (255 in gray-scale value) and black (0 in gray-scale value) image
spots as 100% and 0% reflectance and converted to gray scale value.
A set of controls was prepared in
a similar manner but without the presence of bacteria.
*, numbers significantly higher than the control at P < 0.001 (Tuker-Kramer HSD test).
c
Bacterial concentrations.
d
Similarity index based on MIDI Aerobic Bacterial Library TSBA50.
