12 terms

GCSE Strategies to increase food supply

Growing plants in an air or mist environment without the use of soil
The manipulation (through genetic engineering) of living organisms to produce useful commercial products (such as pesto increase food supply.
A method of growing plants using mineral nutrient solutions, in water, without soil.
Applying water to land in order to supply crops and other plants with necessary water.
The new green revolution
A combination of modern technology, traditional knowledge and an emphasis on farming, social and agro-ecological systems as well as yields, especially in poorer countries.
Low Income Countries where technology could be used to increase food supplies and reduce food insecurity
Negatives of irrigation systems
Reduce water tables in the ground, affect downstream river flow, increase evaporation losses of water and increase the salinity of soils.
Advantages Aeroponics
Plant roots are exposed to more oxygen the plants tend to grow faster, use less nutrients and water as they go directly onto the roots of the plant and are not lost into the soil.
Disadvantage Aeroponics
Very expensive, nutrient mixing and spraying system is essential so if this breaks down the whole crop is lost. Requires specialist knowledge. High maintenance.
Example of new green revolution
breeding of crop varieties that can withstand adverse conditions, such as salt-tolerant rice or more drought-resistant sorghums and millets
BT Corn
a species of corn has been developed with the bacterium Bacillus thuringiensis added to it as a genetic modification to reduce pesticide use
Appropriate technology
equipment that the local community is able to use relatively easily and without much cost, such as solar agriculture in mountainous areas