EQIP and CRP) are factored in, the total amortized costs are lowered below all WTP thresholds. The seedling price scenarios are slightly more sensitive to the interest rates used, with a 5% to 7% reduction in the present value costs with an increase in the real interest rate from 5% to 7%. Whereas, with the higher priced scenario, the decrease in present value costs over that same interest rate change is about 2%. Based on the above cost information, it is clear that the use of shelterbelts, in many cases only add only a few pennies to overall production costs. Some of the results even show ample positive cost margins (possibly as much as $0.33-$0.59 per pig produced of extra costs to spare) to suggest room for shelterbelts to be part of a "suite of technology". It is recognized that with regards to odor control, no single technology is 100% effective, yet if a comprehensive management program is developed and followed, nuisance odor can approach elimination.