But they are also used in the production of fertilizer, garden mulch, and soil conditioner.
The ground has to be tilled, the seeds sown, fertilizer spread, the ground watered.
So it subsidizes fertilizer and encourages farmers to overuse it to maximize crop yields.
Last year Schafer sold 100, 000 gallons of the fertilizer to farmers from Idaho to Florida.
The company is also helping find and promote use of fertilizer that is less carbon-intensive.
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Prices for potash, the important fertilizer ingredient, dropped in 2009 after hitting record highs in 2008.
So, what are the economics of converting fertilizer and tractor fuel into automobile fuel?
The blast came about 20 minutes after a fire was reported at West Fertilizer.
The West Rest Haven was destroyed in the fertilizer blast, its 133 residents evacuated.
It later built a small fertilizer-blend plant and started selling fertilizer to area farmers.
San Francisco currently has a large compost facility that turns food waste into fertilizer.
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I've been told that acid-loving plants like gardenias, rhododendrons, things like that, love very acidic fertilizer.
The blast took place at the West Fertilizer Plant, about 18 miles north of Waco.
They are composted with wood chips from the shipping palates to make fertilizer mulch.
For much of the latter half of 2012, nitrogen-based fertilizer companies were great investments.
Substitutes could be far cheaper than ears of corn--they require less attention, water, fertilizer and pesticides.
To stay alive, Ibiden created its own demand, turning out fertilizer, carbon and ferrosilicon.
While it helps the environment by preventing erosion, no-till farming keeps fertilizer in the upper soil.
Fertilizer stocks fell after surging earnings by Mosaic still came short of Wall Street's expectations.
In contrast, seed giant Monsanto rose 3.5% and fertilizer maker CF Industries jumped 6%.
YCharts Pro, ever conservative, contends that all the major fertilizer stocks are too pricey these days.
We are feeding this compost to millions of worms, who create a natural fertilizer.
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The region is also flush with uranium and potash, a key ingredient in fertilizer.
No chemical fertilizers are used, just organic fertilizer sent straight from the gardens at Castel Gandolfo.
Midwest Fertilizer is a unit of the Fatima Fertilizer Co. and Fazal Cloth Mills Ltd.
Composting has become a common method of recycling food as fertilizer or soil amendment.
Perhaps the joint ventures will be with a major Chinese or Indian chemical or fertilizer manufacturer.
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Among the industries affected: fertilizer, pharmaceuticals, plastics, food processing, electronics, cosmetics, textiles and mining.
Others nod to the past, lauding the qualities of Zamil Steel or a local calcium fertilizer.
The explosion devastated the West Fertilizer Company, about 20 miles (32km) north of Waco, in central Texas.
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