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第21课:《农作物与化肥》教材第一部分提出问题:在农田里施用化肥,对农作物的生长有什么影响?教材第二部分以尿素为例,引导学生研究化肥对玉米苗生长的影响。教材第三部分是学生根据小组制定的实验方案动手实验,并做好观察记录。
Lesson 21: The Crops and Fertilizers Textbook Part 1 Asks Questions: How Fertilizers Are Affected in Farmland and Crops? The second part of the textbook takes urea as an example to guide students to study the effects of fertilizers on the growth of corn seedlings. The third part of the textbook is a hands-on experiment conducted by the students according to the experimental plan formulated by the group, and make good observation records.