Browse "Science & Technology"

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Accommodation

Accommodation, first successful steamboat built entirely in North America. It was launched 19 August 1809 at Montréal, its engines having been constructed at the Forges Saint-Maurice, Trois-Rivières.

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Aerodynamics

Viscosity is the ability of a flowing liquid or gas to develop internal shear stresses that resist flow. In air, viscous forces are generally small in comparison with inertia forces, a condition which leads to flow instability and turbulence.

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Agricultural Research Stations

For more than a century, the federal government has funded agricultural research through a network of research centres strategically placed in almost every province. This research program has played a major role in developing the more than $120-billion Canadian agrifood industry.

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Agricultural Soil Practices

Harvesting of marketable timber, if present, constitutes the first stage and may involve individual trees or a stand. Logs may be cut, stripped and piled with tree harvesters; trees may be knocked down, lifted and moved with tree-dozers.

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Agriculture and Food

Canada's agriculture and food industries have changed greatly in the years since the Second World War. Growth in Canada’s economy, and associated social changes, have altered the way food is produced, processed, handled, sold and consumed.

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Agriculture in Canada

Agriculture is the practice of growing crops and rearing animals mainly for food. Farmers also produce other items such as wool from sheep and CBD oil from hemp plants.

In Canada, agriculture is an important industry. Only about 7 per cent of Canada’s land can be farmed. Other marginal (poorer) land can be used to ranch cattle. Aquaculture operations are found on the East and West Coasts and in the Great Lakes. Some crops such as tomatoes, cannabis and flowers are grown in greenhouses in urban centres. Canadian agriculture faces many challenges. Some of these challenges concern crop protection, soil conservation, labour, climate change and health.

Click here for definitions of key terms used in this article.

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Agroforestry

Agroforestry is an intensive land management system that integrates the benefits from biological interactions created when trees or shrubs are intentionally grown with crops or livestock.

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AIDS

Illnesses that this infection can produce include a transient disease, developing within several months of exposure. It is characterized by rash, fever, malaise, joint pains and lymphadenopathy (swollen lymph nodes).

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Air Profile Recorder

Air Profile Recorder (APR), a narrow-beam recording radar altimeter designed to provide topographic profiles for use in the mapping of wilderness areas. The instrument employs a 3.2 cm pulse transmitter that feeds a parabolic radiator, mounted below the aircraft.

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Alberta Research Council

The Alberta Research Council, the oldest provincial research organization, was established by order-in-council as the Scientific and Industrial Research Council of Alberta in 1921. Instrumental in founding the organization were J.L. COTÉ, provincial secretary, and H.M.