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2"d Weed Control Objective: <br />3`d Weed Control Objective: <br />3.0 Evaluating Weed Control: After you have created weed control objectives and have <br />begun to control the priority weed species on your mine site, you should evaluate the <br />results of your control methods. This requires follow-up visits to the areas where weeds <br />were controlled and re-assessment of the size and density of an infestation. (For example, <br />compare the size of the infestation after a growing season has elapsed to size before <br />control actions were initiated.) In most cases, the elimination of an infestation will take <br />several years with multiple treatments per year to kill the plants and eliminate the bank of <br />weed seeds in the soil. (See Table 2.1) <br />4.0 Analyzing the Effectiveness of Weed Management: After you have analyzed the <br />control results (in some cases over the course of several years), you can determine if the <br />weed control objectives helped you achieve your management goal(s). Make sure to <br />consider the cost of control compared to the benefits realized from weed control. If the <br />benefits of control did not outweigh the cost, it might be better to create new objectives <br />or try other control methods. (For example, it may be more cost effective to use <br />containment and prevention techniques to maintain the current level of weed infestations <br />and to prevent an increase in weed populations.) (See Table 4.1) <br />Footnote: This Noxious Weed Control and Management Plan is based upon the guide as <br />outlined in the Publication prepared by the Office of Colorado State Parks. This