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2.3 Weed Control Objectives: <br />1" Weed Control Objective: <br />2°d Weed Control Objective: <br />3rd Weed Control Objective: <br />3.0 Evaluating Weed Control: After you have created weed control objectives and have begun <br />to control the priority weed species on your mine site, you should evaluate the results of your <br />control methods. This requires follow-up visits to the areas where weeds were controlled and re- <br />assessment of the size and density of an infestation. (For example, compare the size of the <br />infestation after a growing season has elapsed to size before control actions were initiated.) In <br />most cases, the elimination of an infestation will take several years with multiple treatments per <br />year to kill the plants and eliminate the bank of weed seeds in the soil. (See Table 2.1) <br />4.0 Analyzing the Effectiveness of Weed Management: After you have analyzed the control <br />results (in some cases over the course of several years), you can determine if the weed control <br />objectives helped you achieve your management goal(s). Make sure to consider the cost of <br />control compared to the benefits realized from weed control. If the benefits of control did not <br />outweigh the cost, it might be better to create new objectives or try other control methods. (For <br />example, it may be more cost effective to use containment and prevention techniques to maintain <br />the current level of weed infestations and to prevent an increase in weed populations.) (See Table <br />4.1) <br />Footnote: This Noxious Weed Control and Management Plan is based upon the guide as outlined <br />in the Publication prepared by the Office of Colorado State Parks. This document titled, Creating <br />an Integrated Weed Management Plan: A Handbook for Owners and Managers of Lands with <br />Natural Values. 349 pages.