Laserfiche WebLink
• 3.2.1.2 Total Herbaceous Production <br />Figures A4 through A6 present plots of Osgood Sand Reference Area total herbaceous <br />production and September-July precipitation for the data from the years subsequent to the <br />2002 investigation. Each subsequent plot adds one year of production and precipitation <br />data and portrays the accompanying best-fit curve with corresponding equation and <br />correlation coefficient. <br />With total herbaceous production, again third order quadratic equations provided the <br />greatest levels of correlation (RZ values from 0.7968 to 0.8809) for the reference area. <br />The form of the predictive equations varied from those predicting total vegetation cover. <br />The predictive equations for total herbaceous production were concave overall in <br />appearance, originating with a low rate of biomass accumulation and accelerating through <br />increasing levels of precipitation. Additionally, the third order approximations for the <br />reference area revealed an inflection point at low levels of precipitation. While this <br />phenomenon may be related to unmeasured biomass production by woody plants, ibis was <br />not observed in the field nor corroborated by sampling. <br />As with total vegetation cover, a general decrease in the correlation coefficient was noted <br />from 0.8809 in 2002 to 0.7968 in 2003 to 0.7969 in 2004. <br />3.2.1.3 Species Composition <br />• Table AZ (updated in the Amendment for the addition of daza from 2002-2004) was <br />employed to evaluate the significant species components of both the Osgood Sand <br />Reference Area and the reclamation areas. A review of species consistently contributing <br />to total cover revealed that one woody shrub (Artemesia frlifolia), three native warm <br />season grasses (Andropogon hallii, Bouteloua gracilis, and Calamovilfa longifolia), and <br />one cool season grass (Stipa viridula) were the only consistent core contributors of three <br />percent or more relative cover over the period of record. <br />3.2.2 1995, 1997, and 1998 Reclamation Areas <br />3.2.2.1 Total Vegetation Cover <br />Figures A7 through A9 present plots of total vegetation cover within the 1995, 1997, and <br />1998 Reclamation Areas and cumulative September-July precipitation for the years 2002 <br />through 2004. Each subsequent plot adds one year of cover and precipitation data and <br />portrays the accompanying best-fit curve with corresponding equation and correlation <br />coefficient. <br />For total vegetation cover at the 1995, 1997, and 1998 Reclamation Areas from 2002 to <br />2004 a quadratic equation (either second or third order) or logarithmic exponential <br />equation (in 2003) best represented the correlation between total vegetation cover and <br />• September-July precipitation. Differing from the findings in 2002, the best-fit form of the <br />Cooro Energy Lompary Keeneeburg Mine Page 6 <br />2005 Addendum to Revision of Revegetation 5uccese Criteria <br />