Key terms Flashcards
(53 cards)
Food Insecurity
All ppl at all times
Physical. & econ. access
Sufficient, safe & nutritious
Dietary needs & food preferences
Active & healthy lifestyle
Under Nourishment
insufficient food for good health and condition
Malnutrition
diet does not contain the right amount of nutrients
Obesity
- increase affluence –> consumption shifts –> more expensive & processed foods
- fast food outlets promoted by TNCs delivering low-cost, consistent products & employ expats
GHI
- measures hunger at global, national & regional levels
- raises awareness of geo. differences in hunger & how these change overtime
Agro ecosystems
human-managed ecosystems designed for agricultural production
Waste
uneaten/ spoiled food thrown out
Physical factors
Temp, light, water, air, soil
Temperature/ light
- 16°C = optimum
- -0°C = die
- too high/ low = reduce crop yields
- rice = 16-27°C
- need light –> photosynthesis –> plants differ in liht requirements
Water
- = 80% living plants
- irrigation, drainage
- major determiner of crop productivity & quality
- essential for germination of seeds & crop growth
- solvent & transport for minerals & sugars in photosynthesis
Air
- CO₂ = photsynthesis
- Oxygen released –> respiration
- Nitrogen –> nitrogen-fixing plants –> make soil more fertile
Soil
- fertiliser
- mixture mineral & organic matter
- root systems develop
- plants abasorb essential minerals (nitrogen, phosphurus, potassium, calcium) mostly through roots
Types of farming
Arable, pastoral, subsistence
Arable
- growing food crops
- fairly level, well-drained, soils
- the Nile Valley
- the Great Plains
Pastoral
- Raising livestock
- areas unsuitable for arable
- soils often limited fertility
- livestock farming only when the carrying capacity of area not exceeded
- hill farming, Wales
Subsistence
- provision of food by farmers for own consumption & local community
- farmers vulnerable to food shortages due to lack of capital & other entitlements
- Wet-rice farming
Commercial
- farming for profit
- large scale with high capital inputs
Shifting cultivation, sedentary, plantations, intensive, extensive
Shifting cultivation
- confined to a few isolated places
- low pop. density (sustainable for that)
- large areas of land
- limited food demands
- e.g. indigenous groups in tropical rainforest
- rotation of fields rather than of crops
Sedentary
- farmers stay in 1 place
- cultivate same land year after year
Extensive
- large-scale commercial farming
- inputs of lab. & capital = small in relation to area farmed
- yields/ hectare = low
- yields/ capital = high
- Canadian prairies cereal farming
Intensive
- small-scale with high lab. and/or capital inputs
- high yields/ hectare
Cash crops
agricultural products grown primarily for sale and profit, rather than for personal consumption or use
Land grabbing
acquisition of farmland in developing countries by other countries seeking to ensure their own food security