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Agriculture
What % of the people in this world are farmers?
Principle primary-sector economic activity Definition: Deliberate modification of
Earth’s surface through cultivation of plants and rearing of animals to obtain sustenance or economic gain
Origins of Agriculture
Cannot be documented w/ certainty, before recorded history
Hunters & Gatherers:- Lived in small groups (>50)- Gender roles (men-hunt; women-gather)- Frequent travel, seasons, movement of game- 250,000 ppl today (.005%); isolation
Hunters and Gatherers - Contemporary
Africa - Kalahari Bushmen
Arctic - Inuit
South America (Paraguay)- Ache’ Hunters
Australia
Invention of Agriculture
Probably an accident (dropped food) Experimentation Noneconomic reasons (animals) 2 Types of cultivation – vegetative
followed by seed agriculture which is more common today
Location of first Vegetative Planting
Probably originated in SE Asia Fishing led to more sedentary lifestyle Roots such as taro & yam, tree plants
such as banana & palm Other independent hearths may have
been W Africa, NW SA – diffused from there
Vegetative Planting Hearths
Fig. 10-1: There were several main hearths, or centers of origin, for vegetative crops (roots and tubers, etc.), from which the crops diffused to other areas.
Location of First Seed Agriculture Also originated in more than one hearth W India, N China, Ethiopia Diffused quickly, domestication of wheat &
barley – became particularly important thousands of yrs later in European & American civilizations
Integration of seed agr. & domestication of herd animals (cattle, sheep, goats)
Other animal products came later (milk, skins) Complex pattern of diffusion throughout world of
various plants & animals (pg.335)
Seed Agriculture Hearths
Fig. 10-2: Seed agriculture also originated in several hearths and diffused from those elsewhere.
Differences Between Subsistence & Commercial Agriculture
1) Purpose of Farming LDCs – subsistance farming, for purpose of own
consumption Some surplus may be sold, but not purpose and
may not be any surplus some yrs MDCs – Commercial farming, for purpose of
sale off the farm to food-processing companies
- General Mills, Kraft etc.
2) % of Farmers in the Labour Force MDCs; less than 5% directly involved
(Canada & US only 2%) LDCs; 55% # of farmers declined drastically in MDCs
during 20th century Push & Pull factors
Labour Force in Agriculture
Fig. 10-3: A large proportion of workers in most LDCs are in agriculture, while only a small percentage of workers in MDCs are engaged in agriculture.
3) Use of Machinery vs. use of people/animals Small # of farmers in MDC’s can feed
many people Farm machinery 1st produced in 18th
century (2nd agricultural revolution) Transportation improvements move things
farther & faster (railroads, highways) Scientific advances (research) Electronics & GPS
Tractors, per Population
Fig. 10-4: Tractors per 1,000 people. Use of machinery is extensive in most MDC agriculture, but it is much less common in LDCs.
4) Farm Size Commercial- large (US/Canada), although
family owned & operated (98%) Dominated by a handful of large farms (top
4%, 50%+ total output) ½ of US farms generate >$10,000/yr Huge impact of mechanization Fewer farms/farmers, more land devoted
to agriculture (13% more than 1900 – peak in 1960)
Urban sprawl
5) Relationship of farming to other business Commercial farming: Agribusiness More than 20% of US labour works in field
related to agribusiness Machinery manufacturing, fertilizer
production, retailing etc.) Many aspects of agribusiness are
controlled by large corporations