Monsanto positions itself as a green company.

“Using the tools of modern biology,” its website informs us, “we help farmers grow more yield sustainably so they can produce more and conserve more.”

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Compare that twaddle to this bit from Monsanto’s announcement on Tuesday:

[Monsanto’s Chief Financial Officer Terry] Crews will indicate that Monsanto’s Roundup® and other glyphosate-based herbicides business is on track to be above $1.9 billion of gross profit for the 2008 fiscal year, ahead of the previous forecast.

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Wow. Nearly $2 billion in profit, from Roundup alone. As recently as February, Monsanto was expecting to make $1.4 billion from its herbicide division this year. I guess farmers applied it even more copiously than expected.

But the company isn’t just churning out profit by peddling weed-killer. Its seeds are doing pretty well, too — particularly corn:

Crews will also note that for the 2008 fiscal year, the company’s corn business should exceed $2 billion in gross-profit generation for the first time.

Interesting. So it makes nearly as much on herbicide as it does on corn seeds. (Overall, the company expects to make $3.8 billion on seeds in ’08).

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Investors applauded Monsanto’s announcement, sending shares up 7.5 percent Tuesday.

I wonder if they’re being short-sighted. Monsanto’s success rests on Roundup Ready technology — selling seeds genetically engineered to withstand heavy doses of its flagship herbicide.

But Roundup-tolerant weeds (so-called "superweeds") are on the rise. Eventully, farmers will have to shift away from Roundup — Monsanto’s $1.8 billion cash cow.

Meanwhile, Bayer is rolling out a new line of herbicide-tolerant seeds, this one designed to withstand doses of Bayer’s glufosinate herbicide. Ain’t the agrichemical industry grand?