| Retardance
for Up and Downhill |
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| Ø | RUSLE2 chooses
retardance based on row |
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| spacing and the
retardance selected for a |
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| strip of the
vegetation on the contour |
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| - | How does
vegetation slow the runoff? |
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| Ø | Row spacing |
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| - | Vegetation on
ridge-no retardance effect |
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| - | Wide row-no
retardance effect (> 30 inches |
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| spacing) |
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| - | No rows,
broadcast-same as strip on contour |
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| - | Narrow row-small
grain in about 7 inch spacing |
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| - | Very narrow-same
as narrow row except leaves |
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| lay in row middle
to slow runoff |
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| - | Moderate-about 15
to 20 inches spacing |
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