Unit 2 Working the land-Extensive reading

(共16张PPT)
Organic Farming
listen and then find out the main idea of each paragraph.
Para 1:
Para 2:
Para 3:
What is organic farming
Farmers prefer natural waste from animals.
Farmers change crops every two or three years.
Second reading
Read the text again and answer the following questions:
1.What is organic farming
2.What problems are caused by using chemical fertilizers
3.Why do organic farmers grow peas or soybeans after corn or wheat
1.What is organic farming
Organic farming means growing crops without chemical fertilizers.
2.What problems are caused by using chemical fertilizers
There are three problems.First, chemical fertilizers affect the soil and the water supply badly.Second, they allow farmers to grow the same crop year after year and exhaust the soil.Third, they kill both helpful and harmful pests.
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.
3.Why do organic farmers grow peas or soybeans after corn or wheat
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
Chemical fertilizer
Not good for the soil or the water supply
The soil gets exhausted
Kill both helpful and harmful bacteria and pests
Change crops every two or three 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 (root vegetable)
Make sure that what is left in the ground after harvesting becomes a natural fertilizer for the next year’s crop
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.
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
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
1. What made Jia Sixie become interested in improving Chinese farming
He saw how some farms produced good crops and healthy animals and others did not.
Reading task on Page 51 ( 15ms)
Read the passage on Page 51, then finish the exercises on Page 52.
2. How did he think he could help farmers
He thought that when he found the best agricultural methods he would write them dawn so all farmers.
Advice for farmers
Keeping seeds
Choosing seeds to plant
hang seed-heads up to dry all winter, knock seeds out when they are sown
choose ones with the best colour
3. What advice did he give farmers Make notes in the chart.
Advice for farmers
Way to get rid of weeds(1)
Way to get rid of weeds(2)
let animals eat them before planting
turn the soil over and cover so the weeds die.
Advice for farmers
Autumn planting
Spring ploughing
Crops
deep ploughing
less deep ploughing
change crops grown in the same field every year.