Roquette raised eyebrows this week when it said it would build the plant in Portage la Prairie, Manitoba, rather than Saskatchewan, which grows 14 times more peas.

The plant would consume the equivalent of nearly all of Manitoba's current pea production.

Family-owned Roquette picked Manitoba for reasons that include transportation links and access to hydroelectric power, said spokeswoman Carole Petitjean.

"We are confident that, in good collaboration with local farmers, local production in Manitoba will increase substantially in the next five years," she said in an email. Petitjean did not say how much Roquette expects Manitoba pea production to grow but said the plant would process more than 100,000 tonnes of the crop annually once it opens in 2019.

Roquette will also rely on neighboring Saskatchewan, Petitjean said.

The Manitoba plant will help meet fast-growing demand for vegetable protein in food and pharmaceutical products. Pea protein, extracted from yellow peas, is used in nutrition bars, soups, sauces, pasta, biscuits and meat alternatives.

Canada is the world's biggest pea producer.

Manitoba grew 164,200 tonnes of peas last year, the most in 14 years, but a fraction of Saskatchewan's 2.3 million tonne crop, according to Statistics Canada.

Francois Labelle, executive director of Manitoba Pulse & Soybean Growers association, said price would determine how much more peas farmers will plant. The crop could displace sowings of wheat, canola and soybeans, Labelle said.

It is unclear whether the plant will stimulate more Manitoba pea output, with soybeans also becoming a more popular choice for farmers, said Brian Clancey, publisher of agriculture website STAT Communications. But Roquette probably will not have trouble finding enough supply, he said.

Regina, Saskatchewan-based AGT Food and Ingredients, a major pea processing competitor, does not buy many peas from Manitoba, said Chief Executive Officer Murad Al-Katib.

"Roquette announcing that (plant) is great for Western Canadian pulse growers, and ultimately you can't ignore the trend," he said. "Gluten-free, high-protein, high-fiber non-(genetically modified) ingredients are viable food."

(Reporting by Rod Nickel in Winnipeg, Manitoba; Editing by Lisa Von Ahn)

By Rod Nickel