Fertilisers

Question 1

what do they do

Answer 1

improve soil structure reducing soil erosion and increasing the water holding ability of the soil

Question 1

what are natural fertilisers made up of

Answer 1

form of dead and decomposing remains and waste products such as manure

Question 2

limiting factor of these

Answer 2

released over long time periods and are not very concentrated so large amounts are needed

Question 3

What are artificial fertilisers made up of

Answer 3

inorganic matter in the form of powders or pellets that contain pure compounds such as ammonium nitrate

Question 4

advantage 1

Answer 4

easier to apply how much and to measure the effect it will have on crops

Question 5

advantage 2

Answer 5

concentrated so smaller amounts are needed decreasing transport costs

Question 6

advantage 3

Answer 6

easy to apply and are clean and easy to handle

Question 7

disadvantage 1

Answer 7

reduces species diversity leading to mono culture

Question 8

disadvantage 2

Answer 8

high conc of nutrients can affect groundwater going into rivers leading to eutrophication

Question 9

what is eutrophication

Answer 9

lead to harmful algae bloom due to high conc of nutrients in ground water going into rivers etc which can block sunlight and deplete the oxygen in the water layer