Less Tasty & Not As Good For You - Industrially grown produce shows long-term nutritional decline

Less tasty -- and not as good for you
Industrially grown produce shows long-term nutritional decline
by Tom Philpott
28 Jan 2009

http://gristmill.grist.org/print/2009/1/27/165445/631?show_comments=no
http://gristmill.grist.org/story/2009/1/27/165445/631?source=daily

Talk to old-timers, and they'll often tell you that the tomatoes you find in supermarket produce sections don't taste anything like the ones they had in their childhoods in the '30s and '40s.

Turns out, they're probably not as nutritious, either.

In an article [PDF] published in the February 2009 issue of the HortScience Review, University of Texas researcher Donald R. Davis compiles evidence that points to declines in nutrition in vegetables and (to a lesser extent) fruits over the past few decades.

For example:

[T]hree recent studies of historical food composition data found apparent median declines of 5% to 40% or more in some minerals in groups of vegetables and perhaps fruits; one study also evaluated vitamins and protein with similar results.

He points to another study in which researchers planted low- and high-yielding varieties of broccoli and grain side-by-side. The high-yielding varieties showed less protein and minerals.

The principle seems to be that when plants are nudged to produce as much as possible -- whether through lots of synthetic fertilizers and pesticides or through selective breeding -- they deliver fewer nutrients. It evidently isn't just the flavor that's become diluted in those bland supermarket tomatoes.

This is a fascinating insight. We should reflect that for at least 50 years, the best-funded agricultural researchers are the ones work to maximize yield -- that is, gross output per acre. Even now, the Bill & Melinda Gates Foundation is expending hundreds of millions of dollars in an effort to increase yields in Africa.

Rather than isolate and fetishize yield, perhaps ag researchers should learn to take a whole-systems approach: study how communities can develop robust food systems that build healthy soil and produce nutritious food.

(It should also be noted that last year the Organic Center compiled peer-reviewed studies finding that organically grown produce tends to deliver significantly higher nutrient levels than conventional.)

Organic Produce May Soon Be Cheaper Than Conventional Produce

Organic produce may soon be cheaper than conventional produce

http://eartheasy.com/article_organic_produce_cheaper.html

The inexorable rise in oil prices leads to higher costs for chemical fertilizers.

A study by the British Soil Association suggests that the rising price of oil could soon make cereal crops grown with chemical fertilizers more expensive than those produced more naturally.

As oil becomes scarcer and prices rise, local and international economic forces will increasingly begin to favor organic farming over conventional farming. In 2007, the price worldwide for chemical fertilizers rose 200%. Average prices paid by U.S. farmers reached record levels recently at 113% higher than the average price in August 2007.

Industrial farming relies on fossil fuels to mine, manufacture and transport fertilisers which replace nutrients in the soil. Organic farming, however, improves soil fertility through crop rotations, and is therefore less affected by oil prices. Organic farming methods also use less energy, generally emit fewer greenhouse gases, can sequester carbon in the soil, provide more jobs and support more wildlife.

With oil predicted to reach $200 a barrel within five to 10 years, the profit margin on organic wheat, barley and oil seed rape could soon be significantly higher than for the same crops produced by non-organic methods.

References:

MongaBay.com
http://news.mongabay.com/2008/0220-fertilizers.html

The Fertilizer Institute
http://www.tfi.org/publications/pricespaper.pdf