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Strategies to increase food supplies - Coggle Diagram
Strategies to increase food supplies
Irrigation
Water taken from rivers and aquifers and pumped onto crops
Small scale - drip irrigation, Mid scale - sprinklers, Large scale - Reservoirs + dams
In countries with little rain irrigations allows water to always be available for plants (crop yields increase 100 - 400%)
Irrigated farmland suffers from salinisation,
Dams have high set up costs
Waterborne diseases increase
Competition for water used
Increased water logging of soil due to lack of drainage
Aeroponics
Plants are suspended in air
Nutrients + water sprayed onto roots every few minutes
Grow faster as more access to oxygen
plants easily maintained
Little space requiered
Less nutrients and water needed as they are absorbed directly into the plant
Specialist knowledge requiered
Chambers that hold plants can be easily contaminated
VERY expensive
If nutrient misting goes worn there would be lots of problems
Hydroponics
Plants grown in water, there could be sand or gravel to provide support
Water has lots of nutrients and minerals dissolved in it for the plants
Plants receive more nutrients so grow faster
Uses less space
Less water that conventionally grown plants
Some crops can be shipped alive to increase freshness
Chambers easily contaminated
VERY expensive
Specialist knowledge requiered
Bio technology
Plants, animals or fish are genetically modified
Commonly modified to resist pests, drought or flooding
Increaced vitamins + proteins in rice and potatoes
Plants can grow in harsh climates
only 8% of households are food insecure with GM cotton whereas 20% are without it
Concerns of impact on humand health
Seed are expensive to start using
The new green revolution
Usind special seed and fertilisers to increase yields and make sure those who need it get it
Increaces crop yields
Keeps food from being exported so it stays in the country
Finding needed as it is expensive
Appropriate technology
Technonology that is suitable for the type and scale of the agriculture
Technology must be accessible for the community. e.g. Tractors may increase yield but require lots of fuel, specialised knowledge and expensive parts
Help to increase yield and reduce the amount of people needed
Some technology may still require specialised knowledge or be difficult to repaired