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EER 1000 Test 2 Study Guide @ 2024
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EER 1000 Test 2 StudyGuide @ 2024
what was the primary subsistence mode for human survival before agriculture? -
Answer hunter-gatherer
How much of Earths global water is being used for agriculture - Answer 70%
how did the practice of fallow come to be? - Answer based around a 7 year cycle, and
centered on the importance of letting the land regenerate naturally after 6 years of
harvest.
Fertilizers: - Answer allowed land to produce so we didn't need fallow
ex: Nitrogen and phosphorus are DNA builders and historically, manure was used
by how much has global food production increased since the 1950? - Answer food
production has more than doubled since the 1950 and this is bad, for it relies on the
earth's natural resources
Industrization of agriculutre: - Answer began in 1750 in England: used farming
techniques, machinery and increased outputs to support a growing population
what is tillage and its functions? - Answer Tillage is turning old soil under and bring up
the new, nutrient soil so seeds are planted in richly-nutrient soil.
Functions:
- provides a seed bed
- controls weeds
- incorporates organic matter
- different soils respond in different ways
what are the 3 different types of tillage? - Answer 1. Strip of zone tillage
2. minimun tillage
3. zero tillage
what are the implications that come with irrigation? - Answer Irrigation: we are trying to
grow crops in areas that are not designed for crop production
, 1. Salinization of soils: water soluble salts accumulate in the soil
2. Further desertification
3. Decline in freshwater bodies
Soils - Answer agriculture starts with soils!
3 simple techniques:
1. Manuring
2. Fallowing and crop rotation
3. Terracing sloped fields
The Concept of Fallow: - Answer agricultural concept of leaving fields fallow or 'to
rest'—allowing land to rest
How many edible species of plants do humans use? - Answer only 5000 of the total 75
000
what 4 crops make up more of the world's food production than all others combined? -
Answer Wheat, corn, rice and potato
Ways in which we can increase food production: - Answer 1. increased irrigation
2. increasing amount of agricultural lands
3. eating lower on the food chain (more plants)
4. improve food distribution
5. stop FOOD WASTE (around 50% of all food is wasted in Canada)
Global average of consumed meat per person per year - Answer 40kg/88.2 lbs per
person/year
U.S. average consumption of meat per person per year - Answer 82kg/181 lbs per
person/year
How many animals are reared annually worldwide? - Answer 70 billion
How many domestic animals are killed annually for food? - Answer 6 million
how many calories required to produce 1 calorie of beef, pork, or poultry? - Answer
11-17 calories
how much of the USA's soybeans are used for livestock? - Answer 80%
Quantity of water needed to produce 1 kg of wheat, rice, and beef? - Answer wheat :
1,000 L, rice : 1,400 L, beef : 13,000 L (WE ARE IN A WATER SHORTAGE AND PEOPLE
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