this store to supplement their income. but other farmers have sold their land to developers. and over the last 20 years, the number of acres harvested for oranges in florida has dropped by more than half. norah. >> o'donnell: manuel bojorquez, thank you. all right, if you have a child that's getting ready for college, you'll want to listen carefully to this next story. some big changes are coming to the s.a.t. exam. cbs' meg oliver reports it's headed into the digital age. >> reporter: high school junior natalia cossio is one of the first students to take a test run at the new version of the s.a.t. which version of the s.a.t. did you prefer and why? >> i preferred the digital version because it was a lot more concise. >> reporter: the updated test will be online only. it will be two hours instead ofg passages, and calculators allowed for the entire math portion. >> students are going to get their scores back faster and we're going to be able to be a lot more flexible with schools in how and when they give the