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-10- • described previously for Dover quadrats. The number of production exclo- sures established in each vegetation type and control area was determined by techniques described under "Data Collection" above. Table 1 shows the number of production exclosures placed in each vegetation type and con- trol area. Exclosures were left in place throughout the 1979 growing season. All exclosuies were sampled on both affected and wntrol areas during the period August 27 through September 7, 1979. All production samples were collected late enough in the day to ensure that the vegetation surface was dry. TYtii.S precaution ensured the accuracy of wet~areight determinations. Production plots were sampled using a lmz welded aluminum frame quadrat centered within each exclosure. All present-year vegetation growth fal- ling within the lmz quadrat was clipped using pruning shears (shrubs) and grass scissors (forbs and grasses). All shrubs wise clipped near ground level to ensure accurate separation of the present year's growth • in the laboratory prior to drying and weighing, bcperience has shown that new growth can be separated accurately only in the laboratory where envirorunental factors such as wind can be rontrolled. The current year's growth clipped from each protected quadrat was bagged according to major species or life form and properly labeled. Wet weights were recorded by vegetative species and by life form for all species except shrubs using spring scales at the titre of clipping. Laboratory Techniques. The current year's growth was separated from all shrub, sub-shn~b and cushion plant species in the laboratory. Shrub sam- ples were dried at ambient air temperature for approximately 30 days prior to Separation of new growth. This process greatly facilitated the separa- tion procedure and ensured a oa~lete sampling of all leaves since these would generally drop off the plant when dried. New twig y_rowth remained easily di.~tinguishable from old growth (by its lighter Dolor) after 30 days of air Cirying. Thus, accurate separation of both leaf and twig material waG facilitated by this pre-drying technique. All samples were • dried for 24 hours in a gravity drying oven at a constant temperature of 105°C. All samples dried in this manner were weighed to the nearest 0,1 gm (as specified in Wyoming DDQ Guideline #2, March, 1979) on an Ohaus. triple beam balance. Production data were recorded according to major