70th SWCS International Annual Conference July 26-29, 2015 Greensboro, NC

1. Revolutionizing Conservation Delivery

2. RUSLE2
• Revised Universal Soil Loss Equation (Version 2)

3. RUSLE2
(Typical Approach)
• R = Climatic Factor
• K = Soil Erodibility Factor
• L = Length of Slope
• S = Steepness of Slope
• C = Cropping System (Rotation & Tillage)
• P = Practices (Terraces/Contouring/etc.)

4. Choose A Spot
• Identify the predominate HEL SMU

5. MUSYM SOILSERIES
Area
(Acres) % Comp
211 EDINA 4.5 3.9
362 HAIG 25.0 21.6
24E2 SHELBY 4.1 3.5
13B
OLMITZ-ZOOK-COLO
COMPLEX
0.1 0.1
222C2 CLARINDA 21.6 18.7
23C2 ARISPE 25.8 22.4
364B GRUNDY 25.6 22.2
822D2 LAMONI 8.8 7.6
Total 115.5 100.0
Predominate HEL Soil

6. RUSLE2
(One set of parameters)
• R =
• K =
• L =
• S =
• C =
• P =

7. RUSLE2
(One set of parameters)
• R = 160
• K = .32
• L = 175
• S = 7%
• C = CSB
• P = Straight

8. RUSLE2 Calculation
Erosion on predominate HEL Soil = 8 t/ac/yr

9. RUSLE2
(One set of parameters)
• R = 160
• K = .32
• L = 175
• S = 7%
• C = CSB
• P = Straight
8 Tons/Acre/Year

10. Distributed Erosion

11. SoilLossCalculator
The New Approach
• Calculate RUSLE2 on 9 X 9 meter cell
160 acres = 8,100 cells or runs
• Calculate RUSLE2 on 3 X 3 meter cells
160 acres = 73,000 cells or runs

13. Soil Conditioning Index

14. Soil Conditioning Index