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ENVS 2130 Questions with Correct Answers

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Environmental Science

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envs 2130 questions with correct answers

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ENVS 2130 Questions with Correct Answers
How much of the Earth's land can we grow crops? Correct Answer-11%
Green Revolution involved what? Correct Answer-Development of high yielding grain varieties, sythetic pesticides and fertilizers, expansion of irrigation infrastructure
Where does more than half of our imported food come from? Correct Answer-USA
How much of Canada's land mass is free from severe limitations for crop
production? Correct Answer-5%
According to Canada Land Inventory how many classes of agricultural land exist in Canada? Correct Answer-7
Which province has the highest concentration of urban land in Canada? Correct Answer-Ontario
What was the main benefit of the Green revolution? Correct Answer-
increased agricultural production worldwile
Agriculture is considered to have originated first in? Correct Answer-
Fertile crescent of the Middle East All nitrogen fixing plants are Correct Answer-Legumes
Canada is #1 in the world in the production of the following crop Correct Answer-Canola
What has decreased over the last 100 years in Canada? Correct Answer-
Number of farms
What does soil structure describe? Correct Answer-proportion of sand, silt and clay particles present in the soil
What does soil texture describe? Correct Answer-refers to the arrangement of these soil particles into aggregates
Why is top soil the most productive soil layer? Correct Answer-it it where most organic matter is found
What is biological nitrogen fixation? Correct Answer-The process by which organisms can take nitrogen from the atmosphere and convert it to
soil nitirogen
What macronutrient is difficult to manage because it is very strongly held by most soils? Correct Answer-Phosphorous
In conservation tillage operations. What is the percentage of the soil surface covered with plan residues? Correct Answer-30% What soil conditon do we NOT find nutrient deficiencies? Correct Answer-soils with high organic matter contents
The Haber-Bosch process is the industrial process used to produce what?
Correct Answer-Nitrogen fertilizers
The first trophic level of a soil food web consists of Correct Answer-
Plants
What is percetange of soil organic matter with mineral soil? Correct Answer-1 and 5%
Soil organic matter is derived from what? Correct Answer-Biologically derived
What is the percentage of organic soil in soil organic matter? Correct Answer-approx 30%
Why is soil organic matter important? Correct Answer-soil structural stability
Nitrification describes the process where... Correct Answer-Ammonium is coverted into nitrate (more plan available form of nitrogen)

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