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New study shows U.S. ethanol's Indirect Land use change impacts are negligible to non-existent.

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JohnWxy Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Jul-27-11 05:18 PM
Original message
New study shows U.S. ethanol's Indirect Land use change impacts are negligible to non-existent.
Edited on Wed Jul-27-11 05:23 PM by JohnWxy
... Wow, an article reporting on an actual scientific study of ethanol's impact! Now THAT is remarkable in itself!


http://www.sacbee.com/2011/07/26/3796298/new-study-finds-us-ethanol-production.html


A new study published in the July 2011 Biomass and Bioenergy Journal on indirect land use change (ILUC) due to biofuels production indicates that the real impact of U.S. biofuels production on ILUC domestically and internationally is negligible or nonexistent. The study, "Indirect land use change for biofuels: Testing predictions and improving analytical methodologies" was coauthored by Dr. Seungdo Kim and Dr. Bruce E. Dale of Michigan State University. “It is the first evidence-based evaluation of ILUC utilizing actual historic data, employing a 'bottom-up', data-driven, statistical approach based on individual world regions’ land use patterns and commodity grain imports,” stated Dr. Roger Conway, senior partner at Rosslyn Advisors LLC and former director of the United States Department of Agriculture's Office of Energy Policy and New Uses.

Very few previous studies have attempted to find empirical evidence for or against indirect land use change from the historical data. Most previous studies relied on global economic simulations. "Unlike most other ILUC work this study relied on very few assumptions and did not attempt to quantify nor to predict ILUC effects," commented Bruce Dale, coauthor of the study. "We searched for direct historical evidence for ILUC in relevant world areas rather than attempting to project or predict what course ILUC might take. Projecting forward can force scientists to make untestable assumptions."

One interpretation of no ILUC effects is that U.S. crop intensification absorbed and exceeded new ethanol production demand. It is also possible that the effects of biofuels production expansion on ILUC may simply be negligible. Past studies based on economic model assumptions often do not take into account new agricultural techniques that allow for greater crop yields on existing U.S. lands where biofuel corn is produced.

The new study used 1990 -- when the U.S. biofuels industry was very small -- as its baseline and then measured crop changes against that as U.S. ethanol production grew rapidly in subsequent years. In order to test the hypotheses that ILUC had occurred, the authors searched for actual land use change in 18 regions around the world where corn and/or soybeans are produced.
(more)

abstract can be viewed here: http://www.sciencedirect.com/science/article/pii/S0961953411002418

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Maine_Nurse Donating Member (688 posts) Send PM | Profile | Ignore Wed Jul-27-11 07:30 PM
Response to Original message
1. Unfortunately...
those "new agricultural techniques" are likely quite harmful in themselves. This, aside from the fact that the ethanol use has resulted in greatly diminished fuel economy in most vehicles on the road and caused lots of damage to these vehicles.
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JohnWxy Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Jul-30-11 04:57 PM
Response to Reply #1
2. No-Till and low till practices produce less Nitrogen emmissions. these practices are increasingly

being used by farmers but the modeling studies that Dale, Kim refer to have not considered this.


http://www.mendeley.com/research/life-cycle-assessment-of-corn-grain-and-corn-stover-in-the-united-states/

No-tillage practices offer higher accumulation rates of soil organic carbon, lower fuel consumption, and lower nitrogen emissions from the soil than the current or conventional tillage practices. Planting winter cover crops could be a way to reduce nitrogen losses from soil and to increase soil organic carbon levels.


... there are no documented damage to cars that i know of.
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Fledermaus Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-31-11 02:41 PM
Response to Reply #2
5. Increasing soil carbon while providing fuel is good. I would like to see more.
Biomass is the only fuel source that can do both.
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JohnWxy Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Aug-03-11 05:47 PM
Response to Reply #5
6. Maize - soybean rotation with no-till practices is a carbon sink
http://research.eeescience.utoledo.edu/lees/papers_PDF/%5B35%5D.pdf">Carbon budget of mature no-till ecosystem in North Central Region of the United States


Agricultural and Forest Meteorology 130 (2005) 59–69

Steven E. Hollinger a,*, Carl J. Bernacchi a,1, Tilden P. Meyers b,2

The results from this study show that on the local,
regional, and global scales, the maize/soybean
ecosystem is a carbon-sink. Locally, the sink is quite
large which is attributed to carbon stored in the grain,
which is removed from the field. On a regional scale,
the sink is proportionally lower than that of the local
scale as a result of regional consumption of the grain.
On a whole-globe scale, 100% of maize and soybean
yields are consumed annually, e.g. all carbon stored in
grain is consumed somewhere in the world. Thus, the
C-sink is proportionately lower than the local and
regional analysis but the sink is still present. These
results confirm that no-till agricultural practices have
long-term carbon-sequestration potential and may act
to mitigate rising . This sequestration potential
is in addition to the numerous other benefits associated
with no-till agriculture (e.g. Lal, 2004b). How carbon
sequestration potential of this no-till maize/soybean
ecosystem compares with conventional till, however,
still needs to be determined.

Abstract

Continuous measurements of carbon flux from 1997 to 2002 by eddy-covariance were used to evaluate the carbon budget for
a maize (Zea mays L.) and soybean (Glycine max (L.) Merr.) rotation agricultural ecosystem that has been in no-till cultivation
for over 14 years. These measurements were used to determine the net ecosystem exchange of carbon (NEE) at the local scale
and for the North Central Region of the U.S. (NCR). Results show that at the local scale, the no-till ecosystem is a carbon sink
when planted with maize (576 g C m2 per year) and soybean (33 g C m2 per year). On a regional scale, the carbon sink is
proportionally lower than that of the local scale. This is attributed to regional consumption of the grain (over 85% of all NCR
grain is consumed elsewhere in the world) combined with the carbon emissions associated with agricultural practices. Since
nearly 100% of both maize and soybean yields are consumed annually, e.g. all carbon stored in grain is consumed somewhere in
the world, the long-term carbon-sequestration potential of this system is lower than revealed with the local and regional analysis.
Accounting for 100% grain consumption, maize still acts as a C-sink of 184 g C m2 per year while soybean becomes a C-source
of 94 g C m2 per year. As these two crops are grown in rotation, the system when accounting for all emissions to the atmosphere
is a net sink of 90 g C m-2 per year. Overall, however, the potential exists for long-term carbon sequestration.


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4dsc Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-31-11 07:57 AM
Response to Reply #1
3. But ethanol shills will ignore these facts.
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NickB79 Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-31-11 10:15 AM
Response to Original message
4. No increased impact, compared to the already-substantial impact industrial agriculture already has?
We're already fucking huge acreages of the world via deforestation, pollution, soil erosion and humus degradation using industrial monocropping. When you start from that low of a baseline, you don't really have anywhere to go but up (though I suppose you could just tread water and be just as bad).
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JohnWxy Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Aug-03-11 05:52 PM
Response to Reply #4
7. I think the comparison is to farming using conventional tillage practices. but, my understanding is
that in the U.S. farmers are moving to more low-till, no-till practices.


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