现代农业ppt

Climate control
Open air
If the weather conditions are bad you can loose the crops. The landscape is more beautiful. The land must be good for farming (arable land).
Chemical fertiliser
It’s free or can be bought at low It’s expensive.
prices.
It is not a lot of work to mix it
It’s a lot of work to mix it with the with the soil.
1、Look at the pictures and compare 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?
Horsepower
Animals(buffalo;also ox)
Machines(Tractຫໍສະໝຸດ Baidur)
They are not so expensive.
They are expensive.
The “fuel” is cheap(grass,hay etc). They don’t pollute the air. They can be used on different land;eg hill slopes or
Agriculture
Traditional farming--Modern farming --Hi-tech farming ---
Advantages Disadvantages
agriculture
Traditional farming
Modern farming
Hi-tech farming
soil.
It has no smell.
It has a bad smell.
It takes little place to store.
It takes a lot of place to store.
It is easy to transport.
It is difficult to transport.
The landscape is ugly.
Greenhouse can be built where the land is not suitable for farming.
It does not cost a lot to keep the It costs a lot of money to keep the
chickens.
chickens.
It is not a lot of work to keep the It’s a lot of work to keep the
Unit19
Modern Agriculture
irrigation farming
fertilizer plain
farm
prairie
farmer
agriculture
field
seed
crop plants
food
land
arable land countryside grain
Discuss the following questions with you partner.
、What are the advantages and disadvantages of each way ?
Raising chickens
Small scale
Large scale
The farmer can keep only a few chickens.
The farmer can keep thousands of chickens.
chickens.
chickens:feeding,cleaning etc.
The chickens don’t have many problems.
If chickens get ill,many die or must be killed.
The chickens are not so fat.
wet ground. The need to rest sometimes.
The fuel is expensive(gasoline). They pollute the air. They can only be used on flat (level) and dry terrain. They don’t need to rest. You can use them for 5-20 or more years if you can get
You can use them for about 1020 years.
enough spare (repair) parts.
If they get young ones,you get more for free.
If they totally break down,you can eat them.
The chickens are big and fat.
The eggs and meat taste very good. The meat and eggs do not taste so
The chickens are free.
good.
Fertilisers
Natural fertiliser(manure;also dung)
Greenhouse
Weather conditions are controlled,so they cannot damage crops.
It is expensive to build and operate (gas,water,electricity) a greenhouse.
If there is a power failure,you may lose crops.