现代农业.ppt

文档介绍：Unit19Modern Agricultureagriculturefarmirrigationfoodcropfieldplantsplainfarminggrainfarmerfertilizer seedprairiecountrysidelandarablelandDiscuss the following questions with you 、Look at the pictures pare traditional and modern farming. 2、What are the advantages and disadvantages of each way ? 3、What other changes have happened on farms in the last 100 years?Traditional farming---Agriculture Modern farming --- Hi-tech farming ---agricultureTraditional farmingModern farmingHi-tech farmingAdvantagesDisadvantages