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114 t <br />The objectives of the Allen Mine reveaetation study are: • <br />To determine the most successful species to establish by seeding; <br />To determine the applied rate of nitrogen, with phosphorus <br />and potassium held constant, that supports the most vigorous <br />growth of seeded species; <br />To determine the effect of mulch and different mulching material, <br />with nitrogen fertilizer, upon the growth of seeded species; <br />To determine the effect of gypsum application upon the growth•of <br />seeded species within the treatments. <br />Methods <br />Plot Construction <br />Three study plots were established at the Allen Mine to examine <br />different aspects of revegetation at this site. The Main Plot and the <br />Species Evaluation Plot are located on a level area of the deep mine <br />waste dump. The Slope Plot is located 20 m north of the Main Plot on a <br />southeast -facing slope. <br />Main plot. This study was constructed in a split plot design with <br />three replications of eight treatments, each split by an application of <br />gypsum. Each subplot measures 3.65 m by 9.1 m. All treatments other <br />than the absolute control received a uniform application of 220 kg P 20 5 <br />per hectare, as triple superphosphate, Each treatment subplot was split <br />with an application of 3360 kg of gypsum per hectare. The following treat- <br />ments were used in this study: <br />Treatment <br />1 Absolute Control (no fertilizer, no mulch) <br />2 Phosphorus Control - 220 kg P205 per hectare • <br />3 66 kg N per hectare <br />