I always see Focus, the BBC’s science and technology magazine, and mostly I find it too superficial to satisfy to my scientific mind (not surprising really, it’s designed for interested amateurs, not former science professionals). But occasionally they have an interesting and thought-provoking article or comment. One such is in the current issue (April 2008) where Colin Tudge, zoologist, science writer and broadcaster, makes the case for the redesign of farming rather than the current trend towards super-livestock. Unfortunately the BBC doesn’t put the whole of the printed magazine online, so here is a heavily edited (but I hope undistorted) version of Tudge’s article; to read the whole thing you’ll have to buy the magazine.

The US government has approved the cloning of high-performance cattle, pigs, and goats … The idea is to make genetic copies of ‘elite’ animals: the ones that grow quickest, or give the most milk … Commercially, this sounds good.
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But the decision … has been met with protest.
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[A] few decades ago, traditional dairy cows in the western world yielded between 600 and 800 gallons per year, and were productive for at least five to 10 years … Modern herds are expected to average more than 1000 gallons a year [and some even 2000 gallons] … These high-performance cows average only 1.8 lactations, after which they have mastitis and are crippled.
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Worse, though, is the mindset behind this use of cloning. For elite animals do not perform well except in cosseted conditions, and are … force-fed on high-grade feed. This requires huge capital – so such animals are intended only for rich countries whose consumers already have more than enough.
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Worst of all, the frenetic search for the high-yield animals completely misconstrues the role of livestock. Already we are failing to feed the world’s population. An
estimated one billion out of 6.5 billion people are chronically undernourished while another billion suffer from excess.
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The central task is to produce the most nourishment possible from the available landscapes. Food crops produce far more food calories and protein per hectare than livestock, so they should be our priority – cereals, pulses, nuts, tubers, fruit, and vegetables … Cattle and sheep should feed on grass or … trees that grow in places where we cannot easily raise crops … The omnivores like pigs and poultry can feed on surpluses and leftovers.

So farming that is designed to maximise food output produces a lot of plants, with modest amounts of livestock … Plenty of plants, not much meat and maximum variety is precisely what modern nutritionists recommend.
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But modern, industrial, high-tech farming has nothing to do with feeding people. It is designed to generate cash.