fertilisers 3.4 Flashcards
why are fertilisers useful
to give the required nutrients to plants for them to grow well
what are the main nutrients plants need
nitrogen, phosphorus and potassium
what are the types of fertilisers
natural and synthetic
natural fertilisers
manure and compost
synthetic fertilisers
man made chemicals
what are commonly used in fertilisers
ammonia and nitric acid
what are the 2 key processes
the haber process and the oswald process
percentage composition
mass of element/total mass of compound x 100
what is the oswald process
making nitric acid
what is the haber process
the industrial method used to make ammonia
haber process equation
N2 + 3H2 -> 2NH3
what is the catalyst in the haber process
iron
what is the catalyst for the oswald process
platnium
what are the salts used for fertilisers
ammonium nitrate, ammonium phosphate, potassium nitrate and potassium phosphate
