Flashcards in C2g-fertilisers And Crop Yields Deck (11)
How do plants absorb minerals?
Through their roots
What are fertilisers?
Chemicals that provide plants with essential chemical elements
What are three essential elements needed for plant growth?
What is an argument for using fertilisers?
World population rising need to produce more food
It increases food supply
What is an argument against using fertilisers?
Eutrophication and pollution of water supplies
What is eutrophication?
-run off of fertiliser
-increase of nitrate, phosphate in river water
-blocks off sunlight to other plants which die
-aerobic bacteria use up oxygen
-most living organisms die
What apparatus is needed to prepare a fertiliser by neutralisation of acid and alkali?
Nitric acid+ ammonium hydroxide=?
What are the reactants of making a synthetic fertiliser?
What is the method of making a synthetic fertiliser?
Add acid to alkali
Stop when it turns green
Leave to crystallize