Exam 11: Agriculture

________ is NOT an auxiliary energy flow to agro-ecosystems.

Rachel Carson's 1962 book, Silent Spring, publicized the environmental problems associated with ________.

All areas currently used as rangeland can be converted to cropland to increase the production of food.

The development of higher-yielding or otherwise "improved" crops through combining specific genes from different varieties, strains, or unrelated species is called ________.

Briefly describe how agricultural activity contributes to environmental challenges associated with land degradation in Canada

One rationale for a vegetarian diet is that by eating lower on the food chain, consumers allow for the amount of usable energy in the food system to be maximized. Is this always true on rangeland?

When the combined effects of chemicals are greater than the sum of their individual effects, this is called ________.

Persistent and volatile pollutants evaporate into the air in warmer climates and travel in the atmosphere toward cooler areas, condensing out again when the temperature drops. This phenomenon is known as ________

A gene from the bacteria Bacillus thuringiensis that codes for a toxin has been inserted into soybean plants in order to ________.

Plowing alters soil ________.

The Green Revolution will ultimately lead to long-term productivity losses.

Since cropland cultivation began in Canada, ________ tonnes of soil organic carbon has been lost.

Malnourishment is common in ________.

To respond to cosmetic use of pesticides, Ontario instigated ________.

Hexachlorocyclohexanes are found in high concentrations north of the Arctic Circle.

Canadians' meat consumption is ________ than the global average.

Eating at the lowest level on the agricultural food chain is beneficial because ________.

One of the most significant impacts of agriculture is greenhouse gas production.

Recycling plant nutrient sources and using nitrogen fixing bacteria to maximize nutrient use efficiency is called ________.

The production of 1 tonne of grain requires ________ tonnes of water.