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14 <br /> The objectives of the Allen Mine revegetation 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 j <br /> i <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 P025 <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 />