How changing farming methods have impacted on the environment .

1. BY: Pat , Grace and Boss How changing farming methods have impacted on the environment.

2. Brief summary of how farming has changed to allow increased yields Now day farming has changed a lot from the past. To increase the yields they have been using: pesticides, fertilizers and removing hedgerow to get more farming land and easier to use machines on. By pesticides they can reduce the number of yields that has been eaten by the pests and by using fertilizers they can increase the yields of each crop.

4. Soil erosion Soil erosion happens when the hedgerow is removed and there is no barrier to protect the soil from erosion. One case study is called “Giant dust bowl”, (where was this?) this happens because when the hedgerows is removed the wind just blows and picked up all the soil and carries it to another place and become “Giant dust bowl”. Ways to prevent this from happening is to keep the hedgerow so it can stop the soil from blowing away and causing a dust bowl

5. Bioaccumulation Bioaccumulation means the amount of chemical that an organism takes in. An example of a chemical that can cause bioaccumulation is “DDT”. DDT is a type of insecticide; it is use to kills insect so they can gather more crops. But DDT also has effect on other living things, such as a peregrine falcon. It can affect the peregrine falcon by the food chain of a peregrine falcon that passes on the DDT until it reaches the peregrine falcon. When the falcon receive the DDT it also get pass on to the falcon’s eggs which makes the shell of eggs thinner and fragile, this cause the eggs to break when their mother sat on the eggs to incubate them.

7. Destruction of habitat “hedgerow removals” Hedgerow is a row of plants that separate the farm lands but now a day they remove hedgerows to get a bigger farming land, it also makes it easier to use the machines around the farm and use lesser money. The hedgerow removals can cause destruction to habitat, the habitat of the birds because the hedgerows are important wildlife corridors not only habitats of birds but other animal’s habitat will also be destroyed and it can cause soil erosion because when the hedgerow is removed the soil lose mineral and plant nutrients.

8. Hedgerow

9. Eutrophication The process of Eutrophication is when the fertilizers the has been used for the crops is washed in to the lakes, this makes algae start to grows and soon they covered the surface of the river. When they covered the surface light can’t get through and reach the plants that are in the river, this makes them rot and uses up all the oxygen in the river. Soon the oxygen finishes and the animals in the river dies the water will become dark, and this is call eutrophication

11. Use of genetically modified crops and their spread Genetically modified crops or GMO are crops that have been modified to give more products or have a resistant to something, by doing this they have changed the DNA of the original organisms. However by doing this they can create new disease to the organism, but they still use GMO and the use of it has been spread causing the rate of using GMO to increase.

12. THANKYOU FOR WATCHING !

13. B Grade • A good well presented project. You have attempted to use case studies to better explain the changes and the effects they have had. Well done.