™ Nutrient Management Planning ¨ Will these be mandated in your state?  An emerging national issue is how to account for agricultural non-point source pollution.  If your state has passed legislation concerning Total Maximum Daily Loads (TMDLs) you should plan for NMP mandates?

™ Clear Understanding? ¨ According to the EPA’s State Source Water Assessment and Protection Program Final Guidance (U.S. EPA’s SSWAPP Final Guidance, August 1997, page A-25) a susceptibility analysis should be conducted with, “clear understanding where the significant potential sources of contamination are located.”

™ Application of CNMPs ¨ Such plans, if applied on a wide- scale basis, would account for agricultural non-point source pollution, however few agencies have the ability to access this large-scale data. ¨ GIS would be a good candidate to accomplish this task.

™ General NRCS Requirements ¨ Aerial photos (base map). ¨ Soil Maps, Soil Test Results. ¨ Planned Crop Sequence. ¨ Manure Sample Analysis. ¨ Realistic Yield Goals. ¨ Recommended nutrient rates and timing. ¨ Location of sensitive areas. ¨ Complete nutrient budget for N,P,K. ¨ Phosphorus Index Rating.

™ Save the farm!

™ Same Road 4 years later.

™ CNMPs are more than pollution tracking. ¨ Resource management. –Prevent runoff, soil loss. –Land Stewardship (Clean water) –Sustainable Production ¨ Efficiency –Reduce Input Cost. –Improves Management Structure. –Facilitates Better Planning. What are the benefits of a CMNP?

™ What are the problems with such a plan. ¨ No structure currently exists to manage site-specific data on a large scale. ¨ Cost of implementation. ¨ More Programs! ¨ Restrictions on farming practices.

™ Can the EPA and USDA fulfill their commitment? ¨ The Total Maximum Daily Loads (TMDLs) for streams and lakes are set by the state and cannot be exceeded. ¨ Such an analysis does not adequately account for agriculture’s contribution to waterway pollution. ¨ Currently the mechanism for locating non-point source pollution is a watershed scale analysis.

™ Site-Specific Data. ¨ It is imperative that site-specific data be promoted as the needed data for these plans. ¨ Averages of such data by county, will not adequately represent a field and may result in misapplication of both organic and inorganic fertilizers. ¨ Though some extrapolation of data is warranted, there are some attributes such as yield and nutrient levels that are unique to a field.

™ Following is just one element that may improve the resolution of CNMPs. ¨ Site-specific field erosion.  Currently it is acceptable to calculate field erosion using the slope values from SSURGO data.  There is the possibility for large errors when using this data.

™ Soil Loss ¨ Revised Universal Soil Loss Equation (RUSLE) –30 meter resolution Digital Elevation Model data will be used to establish slope steepness for each field. Acquisition: Online download from USGS data warehouse.Acquisition: Online download from USGS data warehouse. –R – Rainfall Erosion Index. NRCS averages for the area.NRCS averages for the area. –K – SSURGO Data (Soil Types) Acquisition: From NASIS Soil Data Viewer (NASIS). Acquisition: From NASIS Soil Data Viewer (NASIS). –C and P (Site specific data ) Cover Management Factors.Cover Management Factors. Support Practice Factors.Support Practice Factors. Slope length.Slope length. Terracing and /or contouring.Terracing and /or contouring.

™ Study SITE ¨ Approximately 5 miles north of Enid, Oklahoma. ¨ Well drained silt loam. ¨ Irrigated corn, soybean rotation. ¨ Conventional tillage.

™ Slope Steepness ¨ It is important to note that both methods are an improvement over SSURGO data. ¨ This research found no significant difference between the average slope calculated using a inclinometer and the average slope generated using 30 by 30 meter DEM data.

™ Slope Surface (DEM)  Though, only a small area of this field contains 4–5 % slopes. SSURGO data attributes this entire field with a 1– 3% percent slope.  Surface values were verified using a inclinometer.

™ Slope Lengths Must be Site-Specific! ¨ There are many papers suggesting that slope length can be obtained from DEMs. ¨ This research found that though DEMs accurately depict average slope, this is not the case with slope length.

™ Highly Erodible Land (HEL)

™ Spreadable acres ¨ Considering P2O5 levels and HEL there are only spreadable acres. ¨ Currently these restrictions only apply to manure.

™ Erosion is only one element of a CNMP. ¨ Feel free to ask question concerning any aspect of CNMP’s.

™ R&D Cooperation ¨ Manure Management Planner ¨ Developed by Brad Joern and Phil Hess of Purdue University. ¨ Outstanding tool for barn management. ¨ John Lory of the University of Missouri- Columbia is developing a MMP ArcView extension.

™ Manure Manager

™ National Soil Information System (NASIS)