With the incredible amount of interest in buying gold and investing in commodities, Investment U has turned to Money Morning commodities expert Peter Krauth to give an idea on where we are in regards to their historic cycles and how investors can take advantage of where we are right now…There’s never been a better time to begin investing in commodities.

The big daddy of underground investors, Jim Rogers, says the best way to play this downturn is to focus on commodities and agriculture ETFs (hat tip The Daily Crux). The primary logic behind this play is simple to understand.

If you know how to play the volatile nature of the commodity sector, this article is not for you. Lee Lowell of the Smart Profits Report gives three reasons why commodity investing has changed for the better, and how to profit from them.

Some commodities are due a strong rebound, says Manraaj Singh. The underlying fundamentals are largely unchanged from July, when many resources were posting record highs. Manraaj says crude oil prices could double by the end of 2009, while agricultural prices will also soar.

Puru Saxena sees a historical opportunity for long-term gains amid the current financial meltdown. There is currently around $3.5 trillion sitting on the sidelines, waiting to be invested in strong sectors. Puru says natural resources and industrials still have strong fundamentals, meaning they may never again be as cheap as they are today.

Value will win out in the end, says Chris Mayer. Nearly every asset class has been taken down by this credit crisis. But the wide gaps between stock prices and tangible business value will close. That’s why Chris says investors should get ready for a major rally in resource stocks.

Crude is testing the $70 a barrel mark. Gold has fallen below $800 an ounce. Most metals are now selling close to cost price…any lower and mines will be forced to shut down. This means commodity prices are hitting a bottom, says Keith Fitz-Gerald. And there are three strong reasons why prices are about to kick off once again.