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applicability of these recommendations in other communities. An evaluation of golf course <br /> fertilization practices,the proper management of municipal fields and restrictions on future lawn <br /> sizes all have value within other Cape watersheds. The outreach recommendations should also <br /> be useful, and there may be benefits to having a broader audience for some of the outreach <br /> programs. <br /> Finally, coordination with the Collaborative and other outreach organizations allows this <br /> program to adapt to new ideas or outreach approaches quickly, supporting the goals of reducing <br /> nitrogen inputs to Pleasant Bay and improving water quality over time. <br /> 5.8 CUMULATIVE IWACT OF RECOMMENDED STRATEGIES <br /> Each strategy implemented individually could result in a reduction in nitrogen load from <br /> fertilizers. From a TMDL perspective,these strategies must have measurable impacts to the <br /> overall load to the Pleasant Bay watershed, and some may be easier to estimate than others. <br /> Table 7 summarizes the nitrogen load reduction estimates for each recommended strategy. One <br /> of the recommended strategies(lawn size limit for future development)targets future nitrogen <br /> loads. The other three recommended strategies have the combined potential to reduce <br /> controllable nitrogen loads by approximately 5.2%. <br /> Table 7. Nitrogen load reduction otential for the recommended strategies <br /> Potential Reduction in N Fertilizer Load Leached <br /> Strategy' o o <br /> (lbs/year) (% of current (/o of current <br /> fertilizer load) controllable load) <br /> Municipal fertilizer management 200 1.2% 0.2% <br /> Golf course fertilizer management 3,650 22.8% 3.5% <br /> Public education and outreach 1,563 9.7% 1.5% <br /> Total(existing) 5,410 33.8% 5.2% <br /> Lawn size limit for new development 1,333 8.3%2 1.30/.2 <br /> Does not include strategies for i4,hich nitrogen loading estimates cannot be calculated <br /> 2 These percentages ii,ere calculated based on current loads, because future loads are unA77ol4,77 <br /> for the Watershed. This strategy addresses future development. <br /> As discussed earlier,while the MEP model does not estimate nitrogen fertilizer loads from <br /> municipal properties, implementation of the municipal fertilizer management strategy would <br /> guarantee that nitrogen loads do not increase over time. HW's GIS-based analysis estimated that <br /> municipalities apply approximately 2,000 lbs of nitrogen fertilizer across the watershed to ball <br /> fields only. This estimate represents approximately 4001bs, or 180 kg of nitrogen leached across <br /> the watershed, but does not include other fertilized properties such as"high-visibility"properties <br /> for each municipality. If towns reduce nitrogen fertilizer applications to these fields to 1.5 <br /> lbs/1,000 sq. ft./year,this would represent an annual reduction of only 200 lbs of nitrogen input <br /> Pleasant Bay Fertilizer Management Plan 40 Horsley Witten Group,Inc. <br /> Final Report December 2010 <br />