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82 Cards in this Set
- Front
- Back
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What is the fastest growing argicultural area in the world?
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South America; Brazil
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What plant has caused an argicultural boom in brazil?
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Soybean
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What is brazil (south america) rich in (land wise)?
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Savannas
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What makes Brazil's soil so good for farming soybeans?
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Highly acidic, red iron rich, low nutrients, climate good for pest control
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Who is the worlds top soy exporter?
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Cerrado Brazil(1/3 total global soy)
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What is the percent of the chronically undernourshied in developing countries?
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<15%`
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If food were equally distrubited how much would each person get a day?
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2800 calories worth
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What is the greatest threat to food security?
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Poverty
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How many children die a year due to malnutrtion?
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6 million
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In 2003 what did the United Nations food summit decide to?
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reduce the number of chronically undernourished to 400 million by 2015
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What country has the largest number of undernourshied people? Highest pecentage?
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India
Percentage: Central Africa |
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What is a Famine?
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A large scale food shortage
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What causes a Famine?
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Environmental conditions
Politics and economics Armed conflicts Political oppression |
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Has a democratic country with free press has ever had a major famine?
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No!!
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What is malnourishment?
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a nutritional imbalance caused by a lack of specific dietary components or an inability to absorb or utilize essential nutrients
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What percent of adult Americans are overweight? What fraction of those are obese?
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64% and 1/3
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Are more people overweight or underweight?
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Overweight
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How many people die a year for obesity?
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400,000
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What is the most common nutrional problem?
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Anemia
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How many people have vitamin or mineral defincines?
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3 billion
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Where is idoine deficney the highest?
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South and South-East Asia
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What are the primary protein sources?
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Meat and diary
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What fraction of cereal grain is used to feed cattle?
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1/3
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Where are wastes from animal pens stored?
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open lagoons
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Seafood is high in what?
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Protein
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What threatens most wild fisheries?
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Overhaversting and habitat destruction
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What is Aquaculture?
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Seafood farms
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What problems do Aquacultures cause?
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Building rearing ponds destroys mangrove forests & wetlands
allows easier spread of disease Escaped exotic species Feces & other pollutants enter and affect ecosystem |
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Is soil a renewable resoure?
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Yes
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How many different types of soil are their in the US?
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20,000
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What would soil be without organims?
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Sterile mineral particles
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What is on the surface of soil?
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Algae
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What do worms and nematodes process?
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plant roots and litter
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Bacteria and fungi decompose what?
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organic material and recycle nutrients
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What antibotics did soil give us?
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Streptomycin and tetracycline
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Soil is stratified into layers called what?
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Horizons
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What is a cross sectional view of horizons called?
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soil profile
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Soil surface is covered with what?
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leaf litter and decomposing stuff
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a Horizon is the what?
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Topsoil
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E horizon is what?
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dissolved or suspended materials moving downwards
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What horizon has the most organisms in it?
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A horizon
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What is B Horizon?
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Sub-soil; lower portion has organic material and upper portion has higher mineral content
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What is c Horizon?
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(weathered parent material)—weathered rock and very little organic material
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How are soils classified?
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by structure and compostion
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How much of Earth's land area is used for argiculture?
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11%
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What would soil be without organims?
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Sterile mineral particles
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What is on the surface of soil?
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Algae
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What do worms and nematodes process?
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plant roots and litter
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Bacteria and fungi decompose what?
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organic material and recycle nutrients
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What antibotics did soil give us?
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Streptomycin and tetracycline
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Soil is stratified into layers called what?
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Horizons
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What is a cross sectional view of horizons called?
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soil profile
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Soil surface is covered with what?
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leaf litter and decomposing stuff
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a Horizon is the what?
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Topsoil
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E horizon is what?
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dissolved or suspended materials moving downwards
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What horizon has the most organisms in it?
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A horizon
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What is B Horizon?
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Sub-soil; lower portion has organic material and upper portion has higher mineral content
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What is c Horizon?
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(weathered parent material)—weathered rock and very little organic material
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How are soils classified?
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by structure and compostion
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How much of Earth's land area is used for argiculture?
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11%
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What is arable land?
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Land that can be used for growing crops
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Soils in tropical Asia, Africa, & S. Amer. are what?
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Old and infertile; nutrients from soil are in plants
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When is land considered to be degraded?
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land is considered degraded when soil is impoverished or eroded
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How many acres of a land are lost to erosion yearly?
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7.4 million
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What are the primary causes of erosion?
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Wind and water
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What is sheet erosion?
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soil removed in thin uniform layers
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What is rill erosion?
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running water forms small channels (most)
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What is Gully erosion?
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large channels
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Genetic engineering does what for crops?
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make crops drought resistant, resistant to disease and increase yields of traditional crops
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What is Triticale?
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Wheat and rye hybrid
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What is winged bean?
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A bean which is made for Hot climate and is Resistant to disease and Enriches soil
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What is arable land?
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Land that can be used for growing crops
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Soils in tropical Asia, Africa, & S. Amer. are what?
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Old and infertile; nutrients from soil are in plants
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When is land considered to be degraded?
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land is considered degraded when soil is impoverished or eroded
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How many acres of a land are lost to erosion yearly?
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7.4 million
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What are the primary causes of erosion?
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Wind and water
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What is sheet erosion?
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soil removed in thin uniform layers
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What is rill erosion?
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running water forms small channels (most)
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What is Gully erosion?
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large channels
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Genetic engineering does what for crops?
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make crops drought resistant, resistant to disease and increase yields of traditional crops
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What is Triticale?
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Wheat and rye hybrid
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What is winged bean?
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A bean which is made for Hot climate and is Resistant to disease and Enriches soil
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