SOURCES OF FOOD

SOURCES OF FOOD

Plants
1. carry out photosynthsis to make food
  1. raw materials : carbond dioxide and water
    1. End product: Sugar and oxygen
      1. Conditions : sunlight and chlorophyll
Soil Conditions
1. Ph
  1. Tests
    1. Lutmus Paper:
      1. Blue lutmus paper turn
        RED: Acidic
      2. Red lutmas paper turn
        BLUE: Alkaline
    2. Universal Indicator
      1. Neutral:GREEN
      2. Acidic: RED, Alkaline:BLUE/PURPLE
  2. Acidic: Sour, Alkaline : Bitter
2. Fertilisers : Add nurients to the soil
  1. Contamination of water, Negative impact on aquatic life
    1. Algae bloom (eutrophication)
      1. algae covers water surface, plants and animal in the water dies
Slush and Burn
1. *method to clear the land
  1. -Cheap and easy method , - eye irrtation andbreathing problmas forest fire, -air pollution
Production of Crops
1. Biological Control: uses natural enemies
  1. Pros: enviroment friendly
2. Chemical Control: Pesticides and herbicides
  1. pros: kills pests and weeds
    1. Cons: soil contaminaton, water contamitation, chemical contamination in food
Improve food production
1. High Tech Method
  1. e.g: Vertical farming, hydroponics, aeroponic
2. Intensive Production Method
  1. e.g : Fish Farm Tanks
3. Improve Plant and animal varieteis

Resource summary

	Created by Azlin Shazwni Azhar over 8 years ago