Laserfiche WebLink
i <br />i <br />ALLEN MINE <br />Methods <br />Three study plots were established at the Allen Mine: The Main Plot and <br />1 Species Evaluation Plot are located on a leve] area of the shale waste <br />material; the Slope Plot is situated 20 m north of the Main Plot on a southeast- <br />facing slope (Figure 9). <br />Main Plot <br /> <br />(_ <br />The plot arrangement is.a split plot block design with three replications <br />of eight treatments, each split by an application of gypsum. Subplots measure <br />3.7x9.0 m. All treatments, with the exception of the Control, received a <br />uniform application of 220 kg PZO;/ha as triple phosphate and 66 kg Kz0/ha as <br />muriate of potash. Each treatment was split and half treated with 3,360 kg of <br />gypsum per hectare (Figure 9). The phosphorus, potassium, and gypsum were <br />surface applied and worked into the waste material by rototilling. Nitrogen <br />additions as ammonium nitrate in Treatments 3-8 was added in split applications: <br />half applied in November 1976 and the remainder in May 1977. Treatments <br />studied included: <br />Treatment l: Control (no fertilizer, no mulch) <br />Treatment 2: 220 kg PzO;/ha, 66 kg K~0/ha <br />Treatemnt 3: 220 kg P,O;/ha, 66 kg Kz0/ha, 66 kg N/ha <br />Treatment 4: 220 kg PZOs/ha, 66 kg K20/ha, 132 kg N/ha <br />Treatment 5: 220 kg PZO;/ha, 66 kg K20/ha, 66 kg N/ha + excelsior mulch <br /> <br />41 <br />