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3.0 Statement of the Weed Problem <br /> The tamarisk will disrupt the structure and stability of native plant communities and degrade <br /> native habitats by monopolizing limited sources of moisture, and increasing the frequency, <br /> intensity and effect of fires and floods. Tamarisk produces up to 200,000 seeds per year, and the <br /> seeds are distributed by wind. The tamarisk can out-compete desired native species and lead to a <br /> decrease in overall species diversity. Once established they are difficult to control and nearly <br /> impossible to eradicate. <br /> 4.0 Control Methods During Mining <br /> Keep disturbance footprint as small as possible <br /> • Disturb only the acreage to be mined in the upcoming field season <br /> • Minimize the number of roads and equipment storage areas <br /> • Reclaim affected areas as soon as possible <br /> • Implement control methods prior to disturbing new areas <br /> Minimize or eliminate wetted soils and puddling, always create positive drainage, and where <br /> practicable <br /> • Slope all affected areas to prevent puddling, and facilitate rapid drying of surface soils <br /> • Convey water via pipes or other means to prevent wetted soils, limit ditch conveyance <br /> • Conduct operations that expose moist soils at a time when tamarisk is not producing seed <br /> or have not in the past 45 days (September—mid April). <br /> Control/Management <br /> • Mechanical <br /> - Root plowing <br /> - Bulldozing (over many years) <br /> - Fire (over many years) <br /> - Note: Fire, root plowing and bull dozing are generally only effective when coupled <br /> with chemical control <br /> • Chemical <br /> - Foliar spraying <br /> - Basal bark spraying <br />