TORONTO (Bloomberg) - Canada stocks rose for a second day as an advance in agricultural and oil prices boosted shares of materials and energy companies.

Potash Corp. of Saskatchewan Inc., the world's largest crop-nutrient maker by market value, jumped as wheat, corn and soybean prices climbed in futures markets. EnCana Corp. and Suncor Energy Inc. led energy companies higher after crude oil prices rose and natural gas futures reached the highest since December 2005.

The Standard & Poor's/TSX Composite Index added 0.7 percent to 14,814.18 in Toronto. Gains in energy and mining companies have sent Canada's benchmark index up 17 percent from a four-month low on March 19.

"There is certainly a lot of momentum in the commodities, which is translating into a lot of momentum in the stocks," said Mathieu Roy, a portfolio manager who helps manage $1.2 billion at Louisbourg Investments Inc. in Moncton, New Brunswick.

Potash increased 2.9 percent to C$203.37, contributing the most to the S&P/TSX index's rise. Wheat futures jumped the most in five weeks on speculation dry weather in Australia will slow progress of the newly seeded crop. Corn and soybean futures advanced on speculation cold, wet soil in the US Midwest has stunted early development of the crops.

EnCana, an oil and natural gas producer and Canada's biggest company by market value, rose 1.6 percent to C$90.91. Suncor, the world's second-largest tar-sands oil producer, increased 1.5 percent to C$68.78. Crescent Point Energy Trust advanced 6.1 percent to C$38.35 for the biggest gain in the S&P/TSC index.

Crude oil futures for July delivery rose 0.3 percent to $127.76 a barrel in New York. Natural gas jumped 2.3 percent to $11.969 per million British thermal units after a report from the US National Weather Service showed that temperatures will be above normal in the coming week, potentially increasing demand for air conditioning and reducing the amount of gas put in storage.

Eldorado Gold Corp. rose 5.6 percent to C$8.50. The Vancouver-based mining company has received all necessary permits and approvals to construct a mine in Efemcukuru, Turkey, it said in a statement distributed by Market Wire.

Centerra Gold Inc. fell the most in the S&P/TSE index, losing 6.2 percent to C$8.30. The gold-mining unit of Cameco Corp. said an agreement for Kyrgyzstan to fix tax rates at the Kumtor gold mine expired after the parliament missed a ratification deadline.

Toronto-Dominion Bank, Canada's third-largest bank by assets, led a decline in financial companies, falling 1.3 percent to C$70.95. US banks and brokerages also dropped after Standard & Poor's lowered its debt ratings on three of Wall Street's biggest securities firms and UK mortgage lender Bradford & Bingley plc. cut the price of its rights offering by a third.