sources of food new

sources of food new

1. Improve food production

   • 1. Plant hormone - Improve growth and ripening of fruits.
   • 2. Improve plant and animal varieties
   • 3. Intensive production methods: - fish farm tanks -milking farm
   • 4. High-tech methods -vertical farming -hydroponics -aeroponics

2. Soil Contamination

   • Fertilisers
     • + add soils to the soil, plants grow better
     • - contamination of water sources - negative impact on aquatic plants -algae bloom(eutrophication) =algae covers water surface, plants and animals in the water dies
   • pH - Indicates acidic or alkaline
     • Tests - Litmus paper - Acidic, Alkaline, Neutral
   • Data logger - Acidic <7 - Alkaline >7 - Neutral 7

3. Slash and Burn

   • -A method to clear land +cheap and easy method
   • -Cause haze and air pollution -Soil erosion -Loss of natural habitats lead to extinction of wild life

4. Protection Of Crops

   • Chemical Method (Herbicides and Pesticides) - Soil Contamination -Water Contamination -Chemicals enter the food chains
   • Biological Method (Natural Method) +environmental friendly -Inbalance of ecosystem