F. Population Dynamics · Population DynamicsFeeding a Growing Population: Canadian Technologies and Projects
F1.2 F1.1 A1.3 A1.7 A1.9 A2.2About 70 minutes
Learning goals- I can explain food security and why feeding a growing population is both a biological and a social problem.
- I can describe several Canadian technologies and projects intended to help nourish growing populations.
- I can use clear criteria to research and evaluate the effectiveness of a technology or project.
- I can find, cite and judge the reliability of sources about a food-security initiative.
Words to know
food security
When all people, at all times, have physical and economic access to enough safe, nutritious food to meet their needs for an active, healthy life (based on the UN Food and Agriculture Organization definition).
yield
The amount of crop harvested per unit area, for example tonnes per hectare.
plant breeding
Selecting and crossing plants to produce varieties with useful traits (artificial selection, from Grade 11 Evolution).
micronutrient
A vitamin or mineral needed in small amounts (iron, iodine, vitamin A, zinc). Shortages cause "hidden hunger".
conservation (zero) tillage
Planting seeds directly into the previous crop's residue without ploughing, which reduces soil erosion and keeps moisture in the soil.
effectiveness
How well a technology or project achieves its intended outcomes, at what cost, and with what side effects.
country food
Food harvested from the land and water by hunting, fishing, trapping and gathering, especially in Indigenous and northern communities.
A biological problem and a human one
The world's population is about 8.3 billion in 2026 and is projected to keep growing for decades (Human Population Growth and the Demographic Transition). The curriculum asks you to research the effectiveness of some Canadian technologies and projects intended to nourish expanding populations.
Biologically, feeding more people means raising the effective carrying capacity for humans: more food per hectare, less waste, better nutrition from the same food. But hunger today is not only a matter of total food. Enough food is grown for everyone; people go hungry mainly because of poverty, conflict, distance, poor infrastructure and inequality. So a good evaluation asks not only "does this make more food?" but "does it reach the people who need it, safely and sustainably?"
Canadian contributions: growing more food
Marquis wheat. In the early 1900s, Charles Saunders, working at the Central Experimental Farm in Ottawa, selected Marquis wheat from crosses that included the older variety Red Fife. Marquis ripened about a week earlier, so it escaped early autumn frosts on the Prairies. It was distributed to farmers in 1909 and soon became the main wheat grown in western Canada, helping make the Prairies a major exporter of grain.
Canola. Rapeseed oil originally contained high levels of erucic acid and the meal contained bitter glucosinolates, limiting its use as food and animal feed. In the 1960s and 1970s, plant breeders Baldur Stefansson (University of Manitoba) and Keith Downey (Agriculture Canada, Saskatoon) bred varieties low in both. The first "double-low" variety, Tower, was released in 1974, and the name canola was registered in 1978. Canola is now one of Canada's most valuable crops; its oil is low in saturated fat, and its meal feeds livestock. Most canola grown in Canada today is genetically modified for herbicide tolerance, which you can connect to your work on biotechnology in the Molecular Genetics unit.
Pulses. Canada, especially Saskatchewan, has become one of the world's largest exporters of lentils and peas, supported by varieties bred at the University of Saskatchewan's Crop Development Centre. Pulses are rich in protein, and their Rhizobium partners fix nitrogen (Symbiosis: Mutualism, Commensalism and Parasitism), reducing fertilizer needs.
Conservation tillage. Many Prairie farmers have adopted zero tillage, seeding directly into the stubble of the last crop. It reduces soil erosion and conserves moisture in a dry climate.
Greenhouses. The Leamington and Kingsville area of southwestern Ontario has one of the largest concentrations of commercial greenhouses in North America, producing tomatoes, cucumbers and peppers year-round. Greenhouses give high yields per hectare and use less water per kilogram, but heating them in a Canadian winter takes a lot of energy.
Canadian contributions: getting nutrition to people
Micronutrients. Hidden hunger (shortages of iron, iodine, vitamin A and zinc) can harm children's growth and learning even when they get enough calories. Dr. Stanley Zlotkin and his team at the Hospital for Sick Children in Toronto developed Sprinkles: single-dose sachets of powdered vitamins and minerals (including iron) that families sprinkle onto home-cooked food to prevent anaemia in young children. Nutrition International, based in Ottawa (formerly the Micronutrient Initiative), supports programs such as vitamin A supplementation and salt iodization in many countries.
Research partnerships. The International Development Research Centre (IDRC), a Canadian Crown corporation created in 1970, funds researchers in low- and middle-income countries, including work on crops, livestock, soils and food systems that local researchers identify as priorities.
Food assistance. The Canadian Foodgrains Bank, a Winnipeg-based partnership of Canadian church-based agencies, provides emergency food aid and supports farmers abroad in practices such as conservation agriculture.
Northern food security in Canada. Food in many northern communities is very expensive because it must be flown or shipped long distances. Nutrition North Canada, a federal program launched in 2011, subsidizes the cost of nutritious foods shipped to eligible isolated communities, and since 2020 has also included a Harvesters Support Grant to help communities hunt, fish and gather country food. The program has been criticized, including by Canada's Auditor General in 2014, over whether subsidies were fully passed on to shoppers and whether eligible communities were chosen fairly. Some northern communities are also testing hydroponic container farms to grow fresh greens year-round; their costs and long-term success are still being evaluated.
How to judge effectiveness
When you research a project, organize your evaluation with clear criteria:
- Need: what problem is it meant to solve, and for whom?
- Outputs: what did it produce or deliver (tonnes of grain, sachets, people reached)?
- Outcomes: did nutrition, health or income actually improve? Outcomes are harder to measure but matter more.
- Cost and scale: cost per person helped; can it be expanded?
- Sustainability: environmental effects (soil, water, energy, biodiversity, ecological footprint) and whether it can continue without outside support.
- Equity and culture: does it reach the most vulnerable? Does it respect local knowledge, food traditions and decision-making, including those of Indigenous communities?
- Evidence quality (A1.9): independent evaluations, peer-reviewed studies and government audits are stronger than a project's own promotional material.
Worked exampleLet's evaluate canola as a technology to nourish growing populations
Using the criteria, give a balanced evaluation of canola breeding.
- Need: a cooking oil and protein meal that could be grown in Canada's short, cool season.
- Outputs: large harvests on millions of hectares; Canada became a major producer and exporter of canola oil and meal.
- Outcomes: a widely used vegetable oil low in saturated fat; meal used as high-protein livestock feed; farm income and jobs in Canada.
- Sustainability concerns: large areas of a single crop (monoculture) can increase pest and disease pressure; herbicide-tolerant varieties have raised concerns about herbicide-resistant weeds; fertilizer use contributes to greenhouse gas emissions.
- Equity: much of the benefit is economic and export-based; it supplies global oil markets rather than directly targeting hunger.
- Judgement: highly effective at increasing food production (outputs and some outcomes), with environmental trade-offs that need management, and only an indirect effect on hunger.
Canola is a major Canadian success in producing nutritious food, but its effect on hunger is indirect, and it has environmental trade-offs. A strong evaluation states both.
Worked exampleLet's evaluate a program from evidence
A student reads that Nutrition North Canada "subsidized millions of kilograms of food" and concludes that the program has solved northern food insecurity. Evaluate this conclusion.
- Identify the evidence type: kilograms subsidized is an output, not an outcome.
- Missing information: did prices for shoppers fall by the full subsidy? Did the number of food-insecure households fall? Survey data show that food insecurity in Nunavut and other northern regions has remained very high.
- Other sources: the 2014 Auditor General report questioned whether the subsidy was always passed on to consumers, which led to closer monitoring of retailers.
- Conclusion: the evidence supports "the program delivers a large subsidy" but not "the program solved food insecurity". A better conclusion would compare outcome data before and after, and consider country food, income and housing too.
The conclusion overreaches: it treats an output as an outcome and ignores evidence that food insecurity remains high.
Just for funCanola's name comes from "Canada" plus "ola" (oil, low acid). It may be the only crop with Canadian citizenship in its name.
Hands-on activityResearch and evaluate one Canadian initiative
You need: a computer or library access, a notebook.
- Choose one initiative: Marquis wheat, canola, pulse breeding at the University of Saskatchewan, zero tillage, Ontario greenhouse vegetables, Sprinkles, Nutrition International, IDRC-funded agriculture research, the Canadian Foodgrains Bank, Nutrition North Canada, or a local food bank or community garden in your own community.
- Find at least three sources, including at least one that is independent of the initiative (a government audit, news investigation, university study or textbook). Record full citations (A1.7).
- Complete a table with the seven criteria from this lesson (need, outputs, outcomes, cost and scale, sustainability, equity and culture, evidence quality).
- Write a 300-word evaluation that ends with a clear, justified judgement: very effective, partly effective or not effective, for what goal.
- Optional at home: visit a grocery store and compare the price and origin of three foods (for example a Canadian greenhouse tomato, a field tomato in season and an imported tomato in winter). How might each choice affect your ecological footprint?
What to look for: a strong evaluation separates outputs from outcomes, names at least one trade-off, distinguishes the initiative's own claims from independent evidence, and gives a judgement tied to a specific goal (for example "effective for increasing yields, less effective for reducing hunger").
Your turn
When all people, at all times, have physical and economic access to enough safe, nutritious food for an active, healthy life.
2Why was Marquis wheat important for the Canadian Prairies?
It ripened earlier (about a week sooner than Red Fife), so it escaped early autumn frosts, allowing reliable wheat growing across much of the Prairies.
3What two changes did canola breeders make to rapeseed?
They bred varieties low in erucic acid (in the oil) and low in glucosinolates (in the meal): "double-low".
4What is the difference between an output and an outcome? Give an example.
An output is what a project produces or delivers (for example, 1 million micronutrient sachets distributed). An outcome is the change that results (for example, fewer children with anaemia).
5How do pulse crops reduce fertilizer needs?
Their root-nodule Rhizobium bacteria fix nitrogen from the air, so less nitrogen fertilizer is needed.
6Give one benefit and one drawback of greenhouse vegetable production in Ontario.
Benefit: high yields per hectare and year-round local produce, with less water per kilogram. Drawback: heating and lighting in winter use a lot of energy, often from natural gas, raising the footprint.
7Why is hunger not only a problem of total food production?
Enough food is produced globally; people go hungry mainly because of poverty, conflict, distance, poor infrastructure and inequality in access.
More practice: warm-up
2Name the two scientists credited with developing canola.
Baldur Stefansson and Keith Downey.
3What does Sprinkles provide?
Micronutrients (including iron) in powder form to add to food, to prevent anaemia in young children.
4In what year was Nutrition North Canada launched?
Food harvested from the land and water by hunting, fishing, trapping and gathering.
More practice: on your own
1Explain how plant breeding can raise the human carrying capacity of a region.
Breeding varieties with higher yields, earlier maturity, frost or drought tolerance, or better nutrition produces more usable food per hectare or lets crops grow in new areas, so the same land can support more people.
2Explain why a source from a project's own website should be checked against an independent source.
The organization has an interest in presenting itself well and may report outputs but not problems. An independent source (audit, peer-reviewed study, investigative journalism) is more likely to report outcomes, costs and weaknesses.
3Why might zero tillage be especially valuable in the dry Prairie climate?
Leaving crop residue on the surface reduces evaporation, keeping soil moisture, and protects soil from wind erosion, which were major problems in the dry 1930s.
4Give one reason why a food-security project in a northern Indigenous community should include support for country food, not just subsidized store food.
Country food is often more nutritious, is culturally important, supports traditional knowledge and community sharing, and does not depend on expensive shipping. Supporting harvesters respects community priorities and self-determination.
5A micronutrient program reports that it reached 2 million children. List two additional pieces of evidence you would want before calling it effective.
Any two: measured reductions in anaemia or deficiency rates; cost per child helped; whether families actually used the product correctly; results from an independent evaluation or controlled study; any side effects.
Challenge
1Compare the effectiveness of a high-yield crop variety and a micronutrient program in reducing malnutrition, using the outputs-outcomes framework and the idea of "hidden hunger".
A high-yield variety increases calories produced (output), which helps if the main problem is too little food, but it may not fix micronutrient deficiencies if the crop is low in iron or vitamins, and its benefits depend on whether poor families can afford or access it. A micronutrient program targets hidden hunger directly, with outcomes such as reduced anaemia that can be measured, often at low cost per person. But it does not increase total food, and it depends on delivery systems. Effectiveness depends on which problem a population faces; often both are needed.
2Canola is mostly grown as herbicide-tolerant GM varieties. Using what you know about natural selection, explain how repeated use of a single herbicide can lead to resistant weeds, and suggest two management practices to slow it.
Spraying the same herbicide repeatedly kills susceptible weeds, but any weeds with mutations that let them survive reproduce and pass on resistance. Over generations, resistant weeds become common (selection, as in antibiotic resistance). Management: rotate crops and herbicides with different modes of action; use mechanical or cultural controls (cover crops, competitive seeding rates); avoid letting survivors set seed.
3Write a balanced judgement (4 to 6 sentences) on whether Canadian agricultural technology has helped nourish the world's growing population, considering production, access and environmental impact.
Sample: Canadian innovations such as Marquis wheat, canola and pulse breeding have greatly increased production and made Canada a major exporter of grain, oil and protein, helping supply world food markets. Programs such as IDRC research partnerships, micronutrient initiatives and the Canadian Foodgrains Bank have targeted hunger and nutrition directly. However, higher production does not guarantee access: hunger persists because of poverty, conflict and inequality, including in northern Canada, where food insecurity remains high. Industrial agriculture also raises the ecological footprint through fertilizer, fuel and land use. Overall, Canadian technology has been effective at raising food supply, partly effective at improving nutrition, and must be paired with fair access and sustainable practices to truly nourish growing populations.
Quiz
1. Marquis wheat was valuable on the Prairies mainly because it:
2. Canola was developed from rapeseed by breeding for low levels of:
3. Which is an OUTCOME rather than an output of a nutrition project?
4. Nutrition North Canada is a federal program that:
5. Who developed Sprinkles micronutrient powders?
6. Pulse crops such as lentils and peas reduce fertilizer needs because:
Big idea (F1.2): Canadian science has helped feed growing populations (Marquis wheat, canola, pulses, zero tillage, greenhouse production) and has supported nutrition and food security (Sprinkles, Nutrition International, IDRC, the Canadian Foodgrains Bank, Nutrition North Canada). Students learn to judge effectiveness by outcomes, costs, sustainability, equity and the quality of evidence, not by outputs alone.
How to help: help your teen find at least one independent source (a government audit, news investigation or university study) for their chosen initiative, and ask: "Is that number an output or an outcome?" The grocery store comparison is a good family outing.
Sensitivity: food insecurity affects many Canadian families, including in your own community. Keep discussions respectful and avoid assumptions about anyone's circumstances.
Sources: Agriculture and Agri-Food Canada and the Canadian Encyclopedia (Marquis wheat, Charles Saunders; canola, Stefansson and Downey); Canola Council of Canada; Hospital for Sick Children (Sprinkles); IDRC; Government of Canada, Nutrition North Canada; Office of the Auditor General of Canada (2014).