Food Flashcards
(22 cards)
Aquaculture still puts pressure on the environment because
Carnivorous species like salmon require 3kg of wild krill+small fish for 1kg salmon
Aquaculture is important because
It provides 40% of the worlds fish stocks
Singapore uses hydroponics and aeroponics and meets
10% of the states food needs using only 1.6% of land
What is the salinity of rivers in the Mekong Delta?
3g/litre
Salt water creep of
4ppthousand has reached 35miles inland
In the Mekong Delta, how many hectares are used for farming?
2.6 million hectares
Why is the Mekong Delta at a high risk of flooding?
Half the land is less than 2m above sea level
What % of national rice production is from the Mekong Delta?
54%
Example of a flood in the Mekong Delta area
In 2000 there’s was severe weather that flooded tens of thousands of hectares of rice paddies and led to a loss of $35 million
The changing diet of vietnam is worrying because
8-10kg of wheat is needed to produce 1 kg of meat!
In what year did the increase in food production force the Vietnamese government to put a cap on exports?
2009
Cap at 1 mill tonnes
Increased food security
GM soya is grown on
Half of Argentina’s arable land (the area of the UK!)
GM soya increases yields by up to
173%
Monsanto’s seeds are used to grow
93% of US soybeans
GM soya puts smaller farmers at a disadvantage because-
- if on marginal land, price of corporate seeds and agro chemicals may put them into debt
- 150 000 smaller farmers have been driven off their land by larger corporations to increase profit in Latin America
In Uganda the staple food is east African highland bananas but since..
2001 a disease called BXW has attacked the plants, leading to losses of $500 mill
The average Ugandan eats their bodyweight times
3 of banana each year!
In Mauritius what two schemes helped improve food security during the population boom of..
1960s
De-rocking scheme and intercropping
What crops were intercropped with the sugarcane?
Potatoes (natural fertiliser- nitrogen fixation) maize and ground nuts
When did the low tech solution of planting different species of plant help feed hunger?
In Luanda, West Kenya
What were the two low tech solutions to stop the destruction cause by stem borer moths and striga?
Inter crpping Desmodium near the maize - repels moths and kills striga
Plant Naple away from crop to attract and kill moths (sticky)
What were the problems faced in Luanda, W. Kenya?
1/4 pop hungry
Caterpillars from the Stem Borer Moth killed up to 40% of the maize crop
Striga roots killed the maize
300 mill ppl affected
