unit 3:food security & sustainable food production(1a) Flashcards
KA1
What is the definition of food security?
the ability of human
populations to access food of sufficient
quality and quantity.
what has lead to a demand for increased food production?
Increase in human population and
concern for food security
food _________ must be sustainable and not _________ natural resources on which ______________ depends.
prodcution
degrade
agriculture
what two factors does agricultural production depend on?
factors that control photosythesis and plant growth
the area to grow crops is …
limited
increased food production will depend on factors that …….
control plant growth
name some examples of factors which control plant growth (3 minimum)
breeding of higher yielding cultivars
use of fertiliser
protecting crops from pests, diseases and competiton
developing pest resistance crops (GM)
all food production is ultimately dependant on what?
photosynthesis
most human food comes from what plant crops?
cereals, potato, roots and legumes
breeders seek to develop crops with
1. higher….
2. ……. to pests and diseases
3. physical characteristics suited to………
4. ability to ……… in particular ……………
nutritional values
resistance
rearing and harvesting
thrive, environmental conditions
where is energy lost in a food chain?
at every trophic level
what conclusion can you make about the amount of food produced per unit area of land, between livestock and plants?
livestock produce FAR LESS FOOD per unit area of land due to LOSS OF ENERGY between trophic levels
how do we know if a food chain is more efficient than another?
because it will be shorter
what is the trophic level of an organism?
the number of steps from the start of the food chain
…… land planted with crops produces far ……. food than the same land planted with ……. to feed ……..
arable
more
grass
livestock
however, what is the one area arguably suitable for livestock production?
areas where the habitat is unsuitable for growing crops
