Some personality types thrive on chance, others flounder. How do you RATE YOUR TOLERANCE and manage for it? • lain and simple, some people are born risk-takers, tackling risk with reckless enthusiasm. Others will only take more measured risks. Brothers Dan and Dave Anderson subscribe to making "calculated decisions:' especially when it comes to marketing. Despite a measly 18 to 19 inches of annual rainfall on their sandy soil near Haxtun, Colo., the Andersons grow more than 2,000 acres of wheat and 3,000 acres of corn. Only 20 percent of their acres are under irrigation. 'We have a high risk tolerance because we're in high-risk country:' says Dan Anderson, who handles most of the marketing for Anderson Wheat Farms. Dave Anderson oversees production on fields that stretch as far as 30 miles in any direction from their headquarters in the northeast corner of the state.