Laserfiche WebLink
the sampling quadrat. The .Sm side of the quadrat was maintained paral- <br />• d <br />d f <br />2 <br />1 <br />; ifie <br />or <br />: <br />lel to the long axis of the plot. This system was mo <br /> plots because of their smaller size. To prevent overlap of sampling <br /> units, a 4 x 4 grid was used on these plots. Pairs with digits greater <br />_ than 4 were rejected. Coordinates for each sampling unit were recorded. <br /> The lower left hand corner of each quadrat was marked with a nail and an <br /> embossed metal_ tag indicating the quadrat number. The upper right hand <br /> corner of the quadrat was marked with a nail or flagged stake to permit <br /> accurate resampliag. The sample plots established in 1978 were <br />•j resampled in 1979. <br /> Figure 2.3-2 shows the data sheet used for this study. Litter <br /> cover (which includes mulch) was estimated on each plot. <br /> 2.3.3 Productivity Measurements <br /> The same quadrats sampled for cover and density were resampled for <br />~' productivity measurements. Vegetation in each quadrat vas clipped to <br />f ground level and bagged according to the following components: planted <br />t grass, planted forb, volunteer grass, volunteer forb, volunteer shrub. <br /> ^Voluateez" represents plants and seedlings present in the topsoil. <br />,~ Dpon return to the laboratory, plant matter was dried for 24 hours at <br /> 105C, and then weighed to the nearest .O1 gram. <br /> 2.3.4 Shrub Transplants <br /> Height of living containerized transplants was recorded during <br />~' September 1979. Shrub diameters were not recorded for containerized <br />~~- stock because nearly all plants consisted of only one stem. Number and <br /> height of living shoot sprouts from local transplant crowns were <br />(_ recorded. Average crown diameters were estimated by measuring the <br /> longest distance between living sprouts oa a given plant and then meas- <br />- -- <br />i uring the distance between living sprouts on a line perpendicular to the <br /> first measurement. <br /> 2.4 Data Analysis <br /> The five quadrat values for density and production for each treat- <br />; meat plot were summed to obtain a density or biomass value/.5 m (5 x <br /> .1 m quads). Quadrat cover values for each plot were summed and divided <br /> by five to obtain as average cover value/plot. A consequence of this <br /> procedure is that no variance for quadrats in plots was estimated. <br />;~ <br />,~ Since there were no significant statistical differences within treatment <br />6 <br />