Background Paragraph: Windbreaks reduce wind velocity over and around crops. This increases yields through reduced drying of the crop and/or by preventing the crop from toppling in strong wind gusts. 
Story: Two farms had winds destroying their crops. Hill farm started installing windbreaks, while Valley farm didn't have the funds to do that so they postponed the project.
Which farm didn't prevent the crop from toppling? Which farm didn't reduce the wind velocity around crops? Which farm didn't reduce the wind velocity over crops? Which farm experienced increased drying of the crop? Which farm experienced reduced drying of the crop? Which farm had decreased yields as a result of their actions? Which farm had increased yields as a result of their actions? Which farm prevented the crop from toppling? Which farm reduced the wind velocity around crops? Which farm reduced the wind velocity over crops?