RUSLE2 and Iowa Phosphorus Index Workshops

Kapil Arora, Field Specialist-Ag Engineering, Central Area; Kris Kohl, Field Specialist-Ag Engineering, Northwest Area; and Angie Rieck-Hinz, P&S, Agronomy Department

Problem Statement:

Producers, co-op agronomists, and technical service providers generally are not trained on Revised Universal Soil Loss Equation (RUSLE2) principles and need better understanding of Iowa Phosphorus Index for conservation and nutrient planning.

Programmatic Response:

Two workshops titled RUSLE2 and Iowa Phosphorus Index were delivered in 2007.  These workshops, developed in collaboration with USDA Natural Resources Conservation Service (Iowa-NRCS), were held in Storm Lake and Des Moines. A total of 52 participants from Iowa, Minnesota, and Nebraska attended these workshops with majority of participants being consultants and service providers.  During these workshops, Iowa-NRCS and ISU Extension staff provided hands-on training on Dominant Critical Area Determination, RUSLE2 Operations, Ephemeral & Classical Gully Erosion, Iowa Phosphorus Index Calculations, collecting field information, and Soil Sampling as needed to meet various regulatory requirements.


A total of 43 workshop evaluations were received.  Those reporting worked with or managed approximately 417 thousand acres and 581 clients on an annual basis.  They also reported developing over 275 nutrient management plans annually.  Benefit gained from the workshop was reported as some to quite a lot.  Participants indicated an average gain of $656 per client serviced or $0.91 per acre serviced.  The overall average gain was reported as over $7,300 per participant.

Participants completing evaluations provided a pre- and post-workshop level of knowledge in their evaluations.  All respondents indicated an average pre-workshop level of knowledge at 40 percent on all topics covered in the workshops.  This level of knowledge was raised to over 77 percent based on post-workshop evaluations.  Every participant reported that the information provided in workshop as helpful towards meeting their needs in developing conservation and nutrient management plans.

Several comments received during the workshops included:  Excellent explaining RUSLE2 inputs number and what they mean, On a scale of 1-10, other RUSLE2 training left with 3-4 understanding - today 8-9, Very informative information and done in an excellent manner, The recap was also helpful - good to see if class remembers!, etc.


164 - Utilization of nutrient management indices and tools

Page last updated: JApril 11, 2008
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