Lecture 1 Flashcards
perlite
• A form of naturally occurring siliceous rock (volcanic glass)
what happens when you heat perlite?
expands to the form used in potting mixes
what does perlite provide to soils?
very light, good for drainage
no nutrients (inert)
Dolomitic limestone
limestone with calcium magnesium carbonate & calcium carbonate
what does Dolomitic limestone provide to soils?
nutrients
&
counters the acidity of the peat
Gypsum
soft sulphate mineral known as calcium sulphate dihydrate
what does gypsum provide to soils?
Provides nutrients & acts as a soil conditioner
what does the FAO monitor?
world status of food consumption & production
what does FAO stand for?
food & agriculture organization
FAOSTAT
database of food & agriculture stats
FAO is an agency of what organization?
UN
The FAO is composed of _____ member states working in over ____ countries worldwide
194
130
FAO def of food security
food security exists when all people, at all times, have physical, social & economic access to sufficient safe & nutritious food that meets their dietary needs & food preferences for an active & healthy life
Predicted that the population will reach _____ by _____
10 billion
2050
why has there been an increase in cals in the food supply?
to more livestock products & vegetable oils
transitional countries
Countries with decres in food availability
were affected by the collapse of the Soviet Union in the late 1980s to earl 1990s
The amount of food per person has increased in the last ____ years
50
BMR: 5’6” tall 130lbs female is ______ cal.
1430
BMR: 5’10” tall 150lbs male is ____ cal
1750
caloric requirements differ due to what factors?
age, gender & activity level
FAO defines undernourished as b/w _______ cal per day
1600 & 2000
USDA defines undernourished as ______ cal per day
< 2100
why has there been an increase in the amount of people undernoursihed?
due to political instability
wasting
Children with wt too low for their ht
Leads to development & growth probs
