I was reading through some articles this weekend, when I found one from BusinessWeek, questioning the viability of herbicide producer Monsanto Co. (NYSE: MON).

The article focuses on the past six months, a period when MON shares have lagged behind the broader market, and then wonders if the stock is still a viable long-term investment. The story was prompted by last Thursday's earnings forecast for $3.10 to $3.30 per share in fiscal 2010, which was well short of the $4.10 that the Street expects.

"Investing in the fertilizer business may not sound sexy, but the dynamics and fundamentals of the food business will turn it into one of the most profitable sectors you could find.," explains global expert Tony Sagami.

In his The Asia Stock Alert he suggests, "Every farmer needs to use fertilizer -- and the most used and most important fertilizer is potash. And Potash Corporation of Saskatchewan (NYSE: POT) is set to make a bundle supplying potash to the world."

"There are approximately 6.6 billion people on our planet today, but that number is expected to grow to 8.2 billion by 2030. That's a lot of mouths to feed. Plus, the amount of food each mouth is eating is also increasing.

"Asia is booming again, and one industry that is growing like wildfire is 'green' tech in China," says Mark Skousen. In The Turnaround Alert, he eyes China Green Agriculture (AMEX: CGA)."

"Urban population and demand for energy is exploding, causing pollution and a reduction in per capita arable land to feed 1.4 billion Chinese.

"One way to profit is to buy China Green Agriculture, one of the fastest-growing agricultural technology companies in China.

The Mosaic Company (NYSE: MOS), the combined Cargill Crop Nutrition and IMC Global Inc., began trading as a Fortune 500 company immediately after its 2004 IPO, and became a dominant player in the fertilizer business.

In just a few short years, Mosaic would be in prime position to ride a global boom in agricultural crop demand that resulted in its shares skyrocketing more than $130 from trough to peak.

From a valuation standpoint, the move higher was completely justified and rational -- up to a point. When the hedge fund momentum investors climbed aboard, astute investors knew that the rapid rise was due for a correction.

The stock sold off hard during the summer, which culminated in a complete washout due to the credit crisis and global economic meltdown. MOS shares fell back to the mid-$30s.

As is often the case, the selling went too far and had more to do with forced liquidations instead of rational valuation metrics.

This post is part of a special annual report -- Top Stock Picks '09 -- in which TheStockAdvisors.com asked 75 leading newsletter advisors to select their favorite investment for the new year.

"Potash Corp. of Saskatchewan (NYSE: POT), the world's largest integrated fertilizer company, is my top pick for 2009," says long-term growth stock specialist Dennis Slothower.

In his Stealth Stocks, he explains, "If you are an aggressive investor looking for a stock that has tremendous potential under an Obama massive stimulation program, Potash has significant potential."

The advisor continues, "POT is the largest producer of potash worldwide by capacity. In 2007, it estimates its potash operations represented 17% of global production and 22% of global potash capacity.

"The company is the second largest nitrogen producer worldwide by ammonia capacity. In 2007, POT estimates its nitrogen operations produced 2% of the world's ammonia production. It is also the third largest producer of phosphates worldwide by capacity.

This post is part of a special annual report -- Top Stock Picks '09 -- in which TheStockAdvisors.com asked 75 leading newsletter advisors to select their favorite investment for the new year.

"Monsanto Company (NYSE: MON), my favorite investment idea for 2009, should prosper regardless of how the economy performs," Charles Rotblut, CFA and editor of Zacks Elite.

In the same sector, Tracey Ryniec, editor of The Zacks Value Trader looks to Corn Products International (NYSE: CPO), noting, "Despite a tough economy, this 100-year old company is positioned to reap the rewards from growth in agriculture."

Regarding Monsanto, Rotblut continues, "Monsanto helps farmers improve their crop yields, via both better seeds and herbicides. In blunt terms, MON provides solutions that most farmers will view as more of a necessity than a luxury.

"The data supports this assessment. Since fiscal 2005, revenues have more than doubled, rising from $5.3 billion to $11.4 billion. Net income has jumped nearly tenfold and free cash flow is up substantially.

"Looking forward, Monsanto thinks fiscal 2009 profits will total $4.20 to $4.40 per share -- an approximate 18% increase over fiscal 2008. The company also thinks that gross profits will grow by a compound annual growth rate of 15% to 20% over the next 3 years.

"Agricultural commodities have been hurt in the recent turmoil," says growth stock expert Stephen Leeb. In The Complete Investor he looks at Mosaic (NYSE: MOS). a world leader in fertilizers.

"Mosaic has been decimated in price despite reporting record earnings. The company is the world's second-biggest producer of fertilizer components and the leading producer of potash.

"It's also the largest maker of processed phosphates, which gives it a lot of leverage to the rapidly growing markets of China and Brazil, and is an exclusive marketer of 1.2 million metric tons of nitrogen products.

"Since its high in June, the stock has lost three-fourths of its value and now trades at just 3 times next year's earnings. The sell-off came despite Mosaic's highest-ever earnings ($2.65 in the latest quarter vs. $0.69 a year earlier) and expanding gross margins (38.1% vs. 26%).

"The apparent reason was that those record earnings were slightly below some analyst estimates. Also, investors perhaps feared that farmers wouldn't be able to obtain credit to buy fertilizers.

"Once all the added liquidity puts these fears to rest, and given that the worldwide inventory of soybeans, corn, and wheat is forecasted to keep declining into 2009, we think demand for Mosaic's products will be strong.

"Long-term investors should use any temporary softness in fertilizer component prices as a great buying opportunity for Mosaic's shares."

Steven Halpern's TheStockAdvisors.com offers a daily look at the latest market commentary and favorite stock picks and investment ideas from the nation's leading financial newsletter advisors.

"Investing in agriculture-related companies has been one of our main themes for the past year, and we still favor it," say resource experts Roger Conrad and Yiannis Mostrous.

The co-editors of Vital Resource Investor note, "We're adding a new stock to the portfolio that should benefit from the increasingly higher global demand for fertilizer: Potash Corp. (NYSE: POT).

"Potash is the world's largest and lowest-cost publicly traded potash producer, the fastest-growing segment in the fertilizer business. Its potash reserves are sufficient for more than 100 years of production.

"The company controls about 70% of the world's excess capacity. Potash Corp is also the world's third-largest phosphate producer and fourth-largest nitrogen producer. Current phosphate reserves should last more than 50 years.

"Potash (NYSE: POT) scored a technical breakout by rising above $210," says technical expert Leo Fasciocco. In his Ticker Tape Digest, he says, "With earnings set to soar the stock now targets a move to $265."

"Postash, based in Canada, produces fertilizer. It produces phosphate and nitrogen from 12 facilities in the United States and South America. Fertilizer stocks have been strong due to rising profits reflecting strong demand for their products and rising prices.

"A long term chart shows an extraordinary bull market advance with the rising 170% the past 12 months versus an 8% decline in the S&P 500 index. Now, the stock has broken out from a seven-week flat base. The move carries POT to a new high on expanding volume.

For 25 years, Steven Halpern, editor of TheStockAdvisors.com, has surveyed the leading financial newsletter advisors asking for their favorite stocks for the coming year. This article is one of 100+ ideas in the Best Stocks for 2008 report.

"If you are looking for a quality company paying an outstanding dividend with excellent upside potential, I recommend Terra Nitrogen (NYSE: TNH), my top conservative selection for 2008," says Dennis Slothower, editor of Stealth Stocks.

"The company produces and distributes nitrogen fertilizer products, used primarily by farmers to improve yield and quality of their crops. With the trend toward bio-fuels, the demand for nitrogen fertilizers has an exponential future.

"The company is one of the largest North American producers of anhydrous ammonia, ammonium nitrate and nitrogen solutions, and is the largest producer of ammonia and ammonium nitrate in the United Kingdom.

"I like this stock for several reasons. It pays a very handsome dividend of 7%, but this is also a growth company that is undervalued with a P/E ratio of 12 times earnings but a sales growth rate of 45%.

"The intrinsic value of this stock is $235 a share. This has the potential of doubling or even tripling your investment over the next three to five years while paying an excellent dividend."

This article is part of a 20 article special report on "Metals, miners and money".

"What do flat-screen TVs, organic tomatoes, bathtubs, and hybrid cars have in common? asks international investing expert Frida Ghitis. The contributing editor to Global Investing explains, "All have a promising future and are produced with key materials brought to you courtesy of Sociedad Química y Minera de Chile (NYSE: SQM)."

Indeed, the company is unusual among miners -- and unique among the stock featured in this resource report -- as the firm is a non-metal miner. Says Ghitis, "Everything SQM sells comes from mines in Chile's Atacama Desert, the driest place on earth. SQM, once state-owned, exploits the unique mix of nitrates, iodine, and lithium in the rich caliche deposits.

"These are the largest known reserve of iodine and nitrate, essential elements for human survival. Also in the mix is lithium, increasingly a staple in electronics.

"Sociedad Quimica y Minera de Chile is a large non-metal mining and chemical operation, with a market cap of more than $2 billion and sales that broke the $1 billion mark in 2006. From its South American perch, it is a true global enterprise; its products are sold in over 100 countries by agencies in more than 20.

For a defensive play that offers exposure to commodities but is not considered vulnerable to the economy, both Mark Skousen and Nick Vardy have added fertilizer producer Potash Corp. of Saskatchewan (NYSE: POT) to their buy lists.

"Steadily increasing demand for ethanol has lead to a 15% increase in U.S. corn plantings, according to the Department of Agriculture," explains Mark Skousen, who points out that crops such as wheat and rice are experiencing high demand as well.

In his Hedge Fund Trader, the advisor says, "As a result, global selling prices for major crops are at their highest level in more than a decade. Farms are pulling out all the stops to maximize production. And the first order of business, of course, is making full use of agricultural fertilizers, chiefly potash."