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~' <br /> <br />-4- <br /> <br />be impacted should occur in less habitat and area. The efficacy <br />of nitrogen fertilizer as a mitigation practice for sage grouse habitats <br />will be evaluated. Recommendations for the most effective application <br />design will also be a product. <br />Approach <br />1. Continue review of available literature concerning fertilization <br />of sagebrush rangelands. <br />2. Continue review of available literature concerning sage grouse, <br />nutritive demands of grouse, responses of grouse to fertilizer, <br />and techniques adaptable to studies of upland game birds. <br />3. Continue intensive counts (2-3 per week) of males on the 6 known <br />leks (Denmark, Raven, Prague, Canuck, Perdiz, Pronghorn) and <br />other known leks (_ 30) (minimum of 4 times each breeding season) <br />in North Park from -. 20 March to ~ 31 May. <br />4. Continue banding samples of male and female sage grouse throughout <br />North Park to achieve samples of at least 50 males in each of 4 <br />quadrats. Grouse will be located where they roost by spot lighting <br />and will be trapped with long handled nets. Some trapping of hens <br />with cannon nets on leks may be necessary. Birds trapped will be <br />banded with serially numbered aluminum bands and color coded (year) <br />bandettes, A sample of 20% of the high spring count of males is <br />desirable for each of the 6 leks in the area to be impacted. <br />5. Population size will be estimated utilizing counts of males present <br />on leks, established patterns of lek attendance and known sex ratios, <br />and ratios of banded to unbanded birds in harvest samples. <br />