Figure 1. Long term annual precipitation received at Bird City, Kansas

1
Figure 1. Long term annual precipitation
received at Bird City, Kansas
cm y-1
Data from NOAA, 1931-1997
2
Figure 2. Precipitation distribution patterns
across Kansas
78.7
44.2
64.3
102.1
48.8
Data from NOAA, 1931-1997
Note values are average year precipitation in cm
3
Figure 3. Effect of surface residue and water
quality on infiltration rates
Soil Sci Soc Am J 621377-1383
4
Figure 4. Ratio of grain yields for 150 residue
versus 100 residue across years for nitrogen by
tillage by cover crop study.
Power et al., 1998
5
Figure 5. Stability indices of aggregates in
conventional and no-tillage systems for two soil
sampling depths.
0 to 5 cm depth
5 to 15 cm depth
SSSAJ 58777-786 (1994)
6
Figure 6. Carbon dioxide evolution from
aggregates in different tillage systems.
gt 2000 um aggregates
250 to 2000 um aggregates
SSSAJ 58787-795 (1994)
7
Table 1. Effect of tillage, fertilizer, and
cover crop on yield of corn following a long-term
no-tillage study where different amounts of
residue were returned to plots following harvest.
Notes Fertilized with 0 or 67 kg ha-1 ammonium
nitrate Cover crop hairy vetch overseeded in
early September tillage none or disk
Power et al., 1998