C2g-fertilisers And Crop Yields Flashcards Preview

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Flashcards in C2g-fertilisers And Crop Yields Deck (11)
1

How do plants absorb minerals?

Through their roots

2

What are fertilisers?

Chemicals that provide plants with essential chemical elements

3

What are three essential elements needed for plant growth?

Nitrogen
Phosphorus
Potassium

4

What is an argument for using fertilisers?

World population rising need to produce more food
It increases food supply

5

What is an argument against using fertilisers?

Eutrophication and pollution of water supplies

6

What is eutrophication?

-run off of fertiliser
-increase of nitrate, phosphate in river water
-algal bloom
-blocks off sunlight to other plants which die
-aerobic bacteria use up oxygen
-most living organisms die

7

What apparatus is needed to prepare a fertiliser by neutralisation of acid and alkali?

Burette
Measuring cylinder
Filter funnel

8

Nitric acid+ ammonium hydroxide=?

Ammonium nitrate

9

What are the reactants of making a synthetic fertiliser?

Sulphuric acid
Ammonia solution

10

What is the method of making a synthetic fertiliser?

Add acid to alkali
Stop when it turns green
Leave to crystallize

11

How do fertilisers increase the crop yield?

Replaces essential elements used by a previous crop
Provides extra essential elements
More nitrogen gets incorporated into plant protein so increased growth