Laserfiche WebLink
3 <br /> <br />An Analysis of Variance (ADV) was performed on the field data to test <br />• <br />the value of gypsum versus no gypsum applications at the Allen Mine and any <br />significant differences between vegetation responses to various treatments at <br />all three operations. In conjunction, Tukey's Honestly Significant Difference <br />test (HS D) was run on mean treatment values across all replicates to identify <br />those treatments responsible for significant differences occurring at p ~ .10. <br />Six random soil cores, taken to a depth of 10 cm, were gathered from <br />C <br />each treatment, mixed thoroughly, and used to represent the surface soil con- <br />ditions for that subplot. Each sample was analyzed by the Soil Testing Labo- <br />ratory at Colorado State University for pH, soluble salts, organic matter, <br />total nitrogen, nitrate-nitrogen, phosphorus, potassium, zinc, iron, copper, <br />manganese, and texture. Soil tests were used to help explain differences in <br />plant responses to various treatments and to identify any changes in physical <br />and chemical properties of the waste materials since their amendments in <br />1976. <br />Annual precipitation was measured at all sites using a IJational Weather <br />Service Standard Type 8 Inch Rain and Snow Gage. Additional information was <br />gathered from U.S. Weather Bureau stations near each mine. <br />Qualitative Measurements of Species Evaluation and Slope Plots <br />Species Evaluation Plots and Slope Plots (at Monarch and Allen) ;,ere <br />qualitatively sampled. Species composition, percent cover, and plant •,igor <br />were noted. <br /> <br />