Requires the Secretary to carry out at least ten demonstration projects, of which: (1) not less than two shall be carried out in each State specified above; (2) at least one shall use primarily one or more herbicides; (3) at least one shall use primarily mechanical means; (4) at least one shall use a biocontrol such as goats or insects; and (5) the others shall use any one or more control methods. Requires each project to: (1) be designed to measure all costs and benefits associated with each control method used, including water savings; and (2) be monitored and maintained for a period of at least five years, at a cost of not more than $100,000 per project per year, after completion.