For the past three years, up to 400 people have gathered in Denver for Colorado Gov. Roy Romer's Agricultural Outlook Forum. This year, on Feb. 18, Romer wants the gathering to focus on the ecology and economics of sustainable farming. Experts such as Marty Strange, who founded Nebraska's Center for Rural Affairs, and Ralph Grossi, a third-generation dairy farmer who heads the American Farmland Trust, are among the featured speakers. During lunch, conference participants will gather at tables of 10 to discuss dryland farming techniques, canola as a new crop, the dialogue between ranchers and environmentalists and future prospects for Denver's water supply, among other topics. The forum costs $80, and groups of 10 or more receive a discount. Sponsors are Gov. Romer, the Colorado Department of Agriculture and Colorado Agricultural Leadership Associates. For more information, call 303/239-4100.