This paper explains a Ricardian method which compares actual farmer be
havior across different climates. The method incorporates farmer's ada
ptation because it captures the outcome of each farmer matching his be
havior to local climate conditions. This paper explores a new applicat
ion of the Ricardian method capturing how climate affects both the per
acre value of farms and how much land is farmed. These empirical rela
tionships are used to predict the agricultural impacts of simple clima
te warming scenarios.