Food resources gateway 2 part 1 tr ppt

Food resources gateway 2 part 1 tr ppt

• 1.
  Food Resources Gateway 2 Part1
• 2.
  Gateway 2 What arethe trends and challenges in the production of food crops? • Population growth vs Food production • Global food production must increase by 70% from 2012 to 2050 to meet the needs of the increasing population. Million of people
• 4.
  How do youmeasure productivity of food production? • Labour per unit area = Number of workers/Land area (hectares) • Crop yield = Amount of food produced (tonnes)/ Land area (hectares) • 1 tonne = 1000kg • 1 hectare = 10000m2
• 5.
  Describing distribution shownin choropleth map • Refer to TB Pg 122 • Describe the distribution of the top rice producing countries. • Describe the distribution of world wheat production.
• 6.
  Factors affecting intensityof food production and supply Factors affecting intensity of food production and supply Physical Social TechnologicalPolitical Economic
• 7.
  Climate • Climate isthe average condition of the atmosphere of a specific place over a long period of time; usually 30 years. • It determines the : • - type of crop grown • - the amount of output • - the productivity of the land
• 8.
  Climate • Areas withhigh temperature (220C-320C) and rainfall (greater than 2000mm) • Tropical Climate = higher output. E.g. wet rice, tropical fruits • Long growing season enables farmers to have 2-3 harvests in a year. • Some crops do not require so much rainfall grow well in temperate climates. E.g. wheat and potatoes.
• 9.
  Climate and AnimalRearing • Climate also affects fish and livestock farming. • Climate must be suitable for the rearing of animals. • E.g. cool temperature is needed for salmon to reproduce and growth. • Salmon farms commonly found in temperate countries such as Australia and U.S.A
• 10.
  Climate Constraints • Inareas with poor climates such as desert areas (too hot) or tundra areas (too cold) • Greenhouses may be used to create optimal conditions for plant growth.
• 11.
  Climate Constraints • Agriculturetechnology • - techniques and methods used in the Green and Blue Revolutions. • - Greenhouses, irrigation systems. • - fertilisers • - special seeds that can grow in harsh climate conditions
• 12.
  Climate • What arethe suitable conditions for cultivation of crops? • What techniques are used in areas where climate is not ideal for cultivation?
• 13.
  Soils and drainage •Fertile soils are found on floodplains, river deltas and in areas surrounding volcanoes. • Alluvium and volcanic ash are rich in minerals -> fertile for farming. • Output per unit in these areas are high. • E.g. Ganges River Delta (India) • E.g. Mt Mayon region (the Philippines)
• 14.
  Fertile Soil • Mineralssuch as phosphorus, zinc and iron are helpful for plant growth.
• 15.
  River Deltas
• 16.
  Soil Types • Productivitydepends also on the soil types. • Soils must be suitable for the crops to grow. • E.g. wet rice grows well in wet and clayey soil. So it can only grow on floodplains and river deltas where this soil is found.
• 17.
  Soil Fertility • Whatare the types of minerals found in the soil that is suitable for farming? • How to ensure continuous soil fertility?
• 18.
  Relief • Refers tothe slope and altitude of a land surface • Terracing is the cutting of steps into a hillside to create flat land for cultivation. • Eg: Longji rice terraces in China, Sapa in Vietnam
• 19.
  What type ofrelief is suitable for cultivation? • Sloping land suitable for crops such as grapes, tea and coffee. They grow best in well-drained soil on sloping land. • Higher altitude suitable for growing strawberries, cabbage. • Flat land suitable for growing rice.
• 20.
  Food for thought •Why is land for farming decreasing? • How do we increase more land for agriculture? • Is food production heavily dependent on physical factors?