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Slow release fertilisers are used to

  • A.match nutrient release to crop uptake
  • B.raise the nutrient content per tonne
  • C.avoid any need for granulation
  • D.make the product cheaper to make

Answer: A

Coated or chemically modified products release nitrogen over weeks, which cuts leaching and volatilisation losses. They cost considerably more per unit of nutrient, so their use is selective. Turf and horticulture are the main markets.

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