February 19, 2012

5.3 Fertilisers

5.3 understand the use of fertiliser to increase crop yield

To increase crop yield in agricultural farming fertilisers are added to the soil. Fertilisers are usually nitrates, phosphates, or a combination of the two. The compounds enter the plants through the roots in the soil and move through the transpiration stream to the leaf
Nitrates -> Proteins
Phosphates -> DNA/ Membrane structure
Fertilisers can be divided into two groups
  1. Organic fertilisers
    • Animal waste – cow faeces
    • Decomposed/fermented
    • Manure (slurry)
  2. Artificial fertilisers
    • Chemicals - Potassium Nitrate and Ammonium Nitrate
    • Applied in solution to release nitrates and phosphates

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