2. Unit 2 Chemical or Organic farming?

3. Farming Are you from a farmer’s family? what do you know about farming? soil ploughing crops weather &climate Irrigating ( 灌溉 ) ……

4. Main idea of the text ? Chemical fertilizes can cause many problems, so organic farming is becoming more popular. First reading ( 3ms )

5. Read and then find out the topic sentence of each paragraph. Para 1: Para 2: Para 3: Para 4: Recently, scientists have been finding that long-term use of these fertilizer can cause damage to the land and dangerous to people’s health. Farmers turn to organic farming. Organic farmers use many other methods to keep the soil fertile. Some of the problems caused by chemical fertilizers

6. Read again and answer the following questions: 1.Why are chemical fertilizers so common in farming? 2.What problems are caused by using chemical fertilizers? 3. What is organic farming? 4. How do organic farmers to keep the soil fertile? Second reading ( 5ms )

7. 1.What do chemical fertilizers become very common in farming? It is used as a great way to stop crop disease and increase production.

8. 2.What problems are caused by using chemical fertilizers? First, they damage the land by _______________________________________ chemical________________________________ for a long time. And it affects _____and _____ __________,since it __________ the crops and cannot be _________ ; these chemicals in the food supply ________ in the bodies, _________ cancers or other diseases. Fruit and other food with chemical grow too fast to _____________________ having more ______ than ________________________ killing the helpful bacteria and pests as well as the harmful ones. stay in the ground and underground water crops and humans animals get insides washed off build up leading to be full of much nutrition water vitamins and minerals

9. 3.What is organic farming? Organic farming is farming without using chemical fertilizers. They focus on keeping their soil rich and free of disease. A healthy soil reduces disease and helps crops grow strong and healthy.

10. Organic farming Crops growing with natural rather than chemical fertilizer Natural waste from animals Make the soil richer in minerals and more fertile A healthy soil Reduce diseases in crops Help crops grow strong and healthy

11. Change the kind of crop in each field every few years. Farmers grow peas or soybeans after corn or wheat so that peas and beans can put minerals back into the soil, making it rich and healthy and ready to grow more wheat or corn. Farmers plant crops to use different levels of soil. And prefer planting grass between crops. 4.How do organic farmers to keep the soil fertile?

12. Change crops every few years Corn,wheat Peas soybeans Put the minerals back into the soil, making it rich and healthy Crops that use the surface of the soil (peanuts) Crops that need a deeper level of soil (vegetable) Planting grass to prevent wind or water from carrying away the soil and leave it in the ground to become a natural fertilizer for the next year’s crop 4.How do organic farmers to keep the soil fertile?

13. Retelling ( 8ms ) Retell the text according to the chart:Organic farming I.Crops growing with natural fertilizers. II.Farmers prefer natural waste from animals. Natural fertilizer Chemical fertilizer 1.make…richer and more fertile 2.reduce…and help…strong 3.the fertilizers kill…and healthy 4.keep free…from chemicals 1.leaving…is not good 2.grow…year after year III.Farmers change crops every two or three years. …to make sure what is left …

14. 1.refer （常与 to 连用） vt. 提交, 谈及, 归诸于, 指点把... 提交, 使求助于 vi. 提到, 涉及, 查阅, 咨询 新法律与耕地无关。 The new law does not refer to farm land. 所谈到的问题 the question referred to 他把他的成功归于他以前所受 的良好教育。 He referred his success to the good education he had had.

15. 2.reduce v make sth smaller in size,number,degree,price,etc. 减少, 降低 e.g. 公司尽力通过减少花销来提高利润。 The company tries to increase profits by _______________. 今年我们已经减少了业务开支。 We ______________ expenses this year. reducing costs have reduced

16. 3. supply vt. 供给 ; n. 供应, 供求之物 supply sth. to /for sb.= provide sth. to/for sb supply sb. with sth.= provide sb. With sth. 向 / 为某人提供某物 in short supply 短缺 medical supplies 医疗用品 They supplied the children ____ toys. They supplied toys ________ the children. with to/for

17. [ 比较 ] supply, provide 和 afford supply 向群众、市场、城市、工厂等 供应物品。 provide 主要指为某人、某物供应物 品, 尤其指生活必需品。 afford 指为一定的目的而提供所需要 的东西。

18. 10. Dr Yuan is more a farmer than a scientist. 与其说袁博士是一个科学家不如说他是一个农民。 be more than=not only 不仅仅，超过 Learning is more than reading. be more +A +than +B 与其说是 B 还倒不如说是 A He is more an ordinary person than a leader.

19. Homework 1.Read the text again after class 2.Finish EX3 on WB 3.Finish the exercises on English weekly