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eridani

(51,907 posts)
Tue Jun 2, 2015, 05:39 AM Jun 2015

Replanting America: 90 Percent of What We Eat Could Come From Local Farms

http://www.takepart.com/article/2015/06/01/everyone-could-eat-local?cmpid=tpdaily-eml-2015-06-01

Eating a local diet—restricting your sources of food to those within, say, 100 miles—seems enviable but near impossible to many, thanks to lack of availability, lack of farmland, and sometimes short growing seasons. Now, a study from the University of California, Merced, indicates that it might not be as far-fetched as it sounds. “Although we find that local food potential has declined over time, our results also demonstrate an unexpectedly large current potential for meeting as much as 90 percent of the national food demand,” write the study’s authors. Ninety percent! What?

Researchers J. Elliott Campbell and Andrew Zumkehr looked at every acre of active farmland in the U.S., regardless of what it’s used for, and imagined that instead of growing soybeans or corn for animal feed or syrup, it was used to grow vegetables. (Currently, only about 2 percent of American farmland is used to grow fruits or vegetables.) And not just any vegetables: They used the USDA’s recommendations to imagine that all of those acres of land were designed to feed people within 100 miles a balanced diet, supplying enough from each food group. Converting the real yields (say, an acre of hay or corn) to imaginary yields (tomatoes, legumes, greens) is tricky, but using existing yield data from farms, along with a helpful model created by a team at Cornell University, gave them a pretty realistic figure.

Still, the study involves quite a few major leaps of faith because it seeks not to demonstrate what is possible for a given American right now but to lay out a basic overview of the ability of local food to feed all Americans. It’s not just projecting yields for vegetables grown on land that is today dominated by corn and soy. The biggest leap of faith is perhaps an unexpected one and is surprisingly underreported: Why do we even want to adjust our food supply to be local in the first place?
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mopinko

(70,388 posts)
1. seems to completely overlook urban farming
Tue Jun 2, 2015, 10:10 AM
Jun 2015

and the surge in community gardening. they are only looking at farm land.
i dont have any numbers, but from my experience, this is a booooooming thing.

a lot of small farmers who cannot compete w agribusiness are finding that growing what people actually eat can keep them in the farming business. that might be a useful metric for them to look at.

eridani

(51,907 posts)
2. That would pretty much be a bonus extra
Tue Jun 2, 2015, 05:32 PM
Jun 2015

During WW II, 40% of veggies came from Victory Gardens. That still leaves a big gap, and doesn't count grains and meat.

NickB79

(19,301 posts)
3. "instead of growing soybeans or corn for animal feed or syrup, it was used to grow vegetables"
Tue Jun 2, 2015, 10:31 PM
Jun 2015

Most egregious leap of faith: assuming most Americans are willing to give up meat consumption, or that we even should in the first place.

Beyond the production of meat, milk, wool, lard, and eggs, livestock has historically been vital to maintaining soil fertility by converting leaves, grasses and woody materials into incredibly valuable manure. You can't practice sustainable agriculture long-term without animal manure inputs, no matter how often you rotate your fields, plant green manures or nitrogen-fixing crops, or let the land lie fallow. Nothing beats the massive fertility deposit of a cow pie or pig plop. Farms that don't use apply livestock manures or practice rotational grazing are forced to utilize synthetic fertilizers made from natural gas, a decidedly non-sustainable practice.

Unfortunately, we've perverted the place of livestock in the past century through our massive increases in meat consumption and the creation of factory farms and feedlots. These atrocities are just as incompatible with a sustainable future as a livestock-free farming vision, and both must be rejected if we are to feed ourselves in a world ravaged by climate change in the 21st century.

A more realistic study would look at how much food we could generate if we went back to small-holding, heavily diversified farms like those common in the 18th and early 20th century. 40-160 acres, a herd of cattle or goats for milk and meat, flocks of free-range chickens, pastured pigs allowed to fatten up on acorns and chestnuts, fields of grains, alfalfa, and vegetables, orchards for fruit, woodlots for firewood and wild game hunting, streams, lakes and ponds for aquaculture and fishing, etc. Such diversity ensures maximum resilience against a changing climate, and makes sure the land remains fertile.

Basically, everything advocated in this famous and wonderful book: http://www.amazon.com/The-Self-Sufficient-Life-How-Live/dp/0756654505

 

GliderGuider

(21,088 posts)
4. Since at least 1900 the biomass of food animals has been ~3x that of humans.
Wed Jun 3, 2015, 09:29 AM
Jun 2015

As our population goes up and the poor become more affluent, the biomass of domestic animals rises proportionately. Through the principle of competitive exclusion, the biomass of wild animals goes down as a result.

That's the reality of the situation.

 

Nihil

(13,508 posts)
5. Whilst true, I would venture that the *wastage* of that domestic animal biomass has increased more
Thu Jun 4, 2015, 04:34 AM
Jun 2015

... i.e., while the animals (and their supporting feed) were being reared in smallholdings rather
than CAFs, the efficiency when measured in terms of input to consumed output has decreased
whilst the amount of simple waste (i.e., input discarded and not used, whether at the feeding stage,
the overuse of artificial fertilizer, the development/transport/insertion of hormones & drugs, the
losses from transport, the wastage of the end product - thrown away after the "fresh period&quot
has greatly increased.

So yes, your point is most definitely valid but so is Nick's.

We all agree that there are far too many people and that is the spark of the problem.

The accelerant is the mindset that the only way forward is to mine/grow/produce/consume more
of everything.

The resulting conflagration is all around us and in the projections for the near future.

JMO.

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