Revolutionizing Conservation Delivery

RUSLE2

• Revised Universal Soil Loss Equation (Version 2)

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.)

Choose A Spot

• Identify the predominate HEL SMU

MUSYM SOILSERIESArea

(Acres) % Comp

211 EDINA 4.5 3.9

362 HAIG 25.0 21.6

24E2 SHELBY 4.1 3.5

13BOLMITZ-ZOOK-COLO

COMPLEX0.1 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

RUSLE2(One set of parameters)

• R =• K =• L =• S =• C =• P =

RUSLE2(One set of parameters)

• R = 160• K = .32• L = 175• S = 7%• C = CSB• P = Straight

RUSLE2 Calculation

Erosion on predominate HEL Soil = 8 t/ac/yr

RUSLE2(One set of parameters)

• R = 160• K = .32• L = 175• S = 7%• C = CSB• P = Straight

8 Tons/Acre/Year

Distributed Erosion

SoilLossCalculatorThe New Approach

• Calculate RUSLE2 on 9 X 9 meter cell160 acres = 8,100 cells or runs

• Calculate RUSLE2 on 3 X 3 meter cells160 acres = 73,000 cells or runs

Soil Conditioning Index

Soil Conditioning Index