Want "green" food? Use chemicals of course!

This is a cool one I stumbled upon. It reminds me of a presentation I caught where this researcher was trying to convince the crowd that DDT (already banned at the time) was safer than insecticidal soap because of the small amount used. His take on this has changed my perspective on things despite the fact that I think the presenter was a crackpot.

Well this article has as part of it the equivalent of the same argument but as it relates to fertilizer and to a lesser extent tillage and herbicides. Here's the article in full which also contains information about food politics/economics in other ways as well.

Here's an excerpt about fertilizer, tilth and herbicides as it appears in The Economist:

But not everyone agrees that organic farming is better for the environment. Perhaps the most eminent critic of organic farming is Norman Borlaug, the father of the “green revolution”, winner of the Nobel peace prize and an outspoken advocate of the use of synthetic fertilisers to increase crop yields. He claims the idea that organic farming is better for the environment is “ridiculous” because organic farming produces lower yields and therefore requires more land under cultivation to produce the same amount of food.

Thanks to synthetic fertilisers, Mr Borlaug points out, global cereal production tripled between 1950 and 2000, but the amount of land used increased by only 10%. Using traditional techniques such as crop rotation, compost and manure to supply the soil with nitrogen and other minerals would have required a tripling of the area under cultivation. The more intensively you farm, Mr Borlaug contends, the more room you have left for rainforest.

What of the claim that organic farming is more energy-efficient? Lord Melchett points out for example that the artificial fertiliser used in conventional farming is made using natural gas, which is “completely unsustainable”. But Anthony Trewavas, a biochemist at the University of Edinburgh, counters that organic farming actually requires more energy per tonne of food produced, because yields are lower and weeds are kept at bay by ploughing. And Mr Pollan notes that only one-fifth of the energy associated with food production across the whole food chain is consumed on the farm: the rest goes on transport and processing.

The most environmentally benign form of agriculture appears to be “no till” farming, which involves little or no ploughing and relies on cover crops and carefully applied herbicides to control weeds. This makes it hard to combine with organic methods (though some researchers are trying).

Too rigid an insistence on organic farming's somewhat arbitrary rules, then—copper, a heavy metal, can be used as an organic fungicide because it is traditional—can actually hinder the adoption of greener agricultural techniques. Alas, shoppers look in vain for “no till” labels on their food—at least so far.