5.3

understand the use of fertiliser to increase crop yield



5.3:
want to increase growth = achieved by adding fertilisers to the soil
usually take the form of nitrates or phosphates
the compounds go to the soil, taken up by the root structure, the transpiration system takes them to the leaves
Nitrates will go on to form proteins, Phosphates are involved in DNA and membrane structure
The fertilisers = Organic OR Artificial
ORGANIC: produced from animal waste on forms eg: cow faeces -> goes through decomposition and fermentation -> forms slurry gives plants nitrate and phosphate to promote growth
ARTIFICIAL: are chemicals, synthetically produced (potassium nitrate & amonium nitrate) farmer buys them then applied to the field this also promotes growth
4.16- Eutrophication= problem that arises through use of articial and sometimes organic fertilisers.