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eh ESPEY, HUSTON & ASSOCIATES, INC. <br />• <br />embankments will be dozed or bladed into the pond area. Ditches <br />will be filled and leveled to approximate premising contours. <br />Approximately 12 inches of topsoil (A horizon) will be replaced and <br />interfaced by ripping. A second 12-inch lift will then be distri- <br />buted and ripped in similaz fashion. <br />o Topsoil Stockpile. Any remaining topsoil will be distributed over <br />the topsail storage azea. The azea will be ripped along the contour <br />to create an interface between the topsoil (A horizon) and the <br />original ground surface. Topsoil storage azeas will be regraded <br />with the remaining topsoil to establish premising contours and <br />ripped to create an interface between the topsoil and subsoil layer. <br />Note: If the expanded project is approved as Northern now intends, the second <br />12-inch lift of topsoil will not be distributed but will be retained for use <br />• in sections of the refuse area where topsoil is less plentiful than it is in <br />the Phase 1 area. <br />13.5.3.3 Fertilization <br />Native and introduced plant species have differential responses to <br />fertilizer requirements. A program that is capable of stimulating initial growth and <br />root development without favoring one species or group of species over another is <br />required. Introduced species have the ability to utilize abundant levels of plant <br />nutrients with greater efficiency than manq native species. Over-stimulation of a <br />species group could contribute to over-competition and reduction in total native <br />plant population. <br />Both native and introduced species play an important role in the <br />revegetation process. Introduced species provide rapid establishment of cover and <br />production while the native species provide astable plant community with the <br />• <br />13-23 <br />