| Ridges |
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| Ø | Ridges up and
downhill increase soil loss by |
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| increasing
interrill erosion |
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| Ø | Function of: |
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| - | Effect increases
with ridge height |
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| - | Effect decreases
with slope steepness above 6% |
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| Ø | Ridge height
decays with rainfall amount and |
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| interrill erosion |
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| Ø | Effect shifts
from increasing soil loss when up |
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| and downhill to
decreasing soil loss when on |
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| the contour |
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