Environment

FSI scholars approach their research on the environment from regulatory, economic and societal angles. The Center on Food Security and the Environment weighs the connection between climate change and agriculture; the impact of biofuel expansion on land and food supply; how to increase crop yields without expanding agricultural lands; and the trends in aquaculture. FSE’s research spans the globe – from the potential of smallholder irrigation to reduce hunger and improve development in sub-Saharan Africa to the devastation of drought on Iowa farms. David Lobell, a senior fellow at FSI and a recipient of a MacArthur “genius” grant, has looked at the impacts of increasing wheat and corn crops in Africa, South Asia, Mexico and the United States; and has studied the effects of extreme heat on the world’s staple crops.

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It is August again, and my wife and I are back on our farm. We have a medium-sized operation in east-central Iowa that produces soybeans, alfalfa, and corn, and that also supports an Angus cow-calf herd. These summers are supposed to be quiet, relaxing times away from the bustle of Stanford University. However, the days here seem anything but tranquil.  Two years ago my almanac report dealt with one of the worst droughts in Iowa’s history; last year the focus was on flooding and the wettest planting season on record.  I suppose it is only fair that wind should be the main topic this year. For our rural neighborhood, only problems, not answers, seemed to have been blowin’ in it.

Two evenings after our arrival from California, we were sent scurrying to our doubly reinforced “safe” room in the basement. Warning sirens blared, all television stations went on emergency broadcasting, and the spontaneous neighborhood phone line magically got activated.  Everything was for real, and all hell broke loose.  Eighty-five m.p.h. flat-line winds, grape-sized hail, and buckets of rain.  The power went out, and our safe-room conversation centered on whether or not to start our small generator—not for lights, but to assure that the sump pump continued working!

For a swath three miles wide and 15 miles long the tornado danced—jumping here and skipping there. Some farms were spared; others were pretty much demolished.  We were moderately lucky.  We lost an infinite number of branches and our largest oak tree—a four-foot diameter, 70-foot tall specimen. Entire trees were twisted off like toothpicks. Shingles from roofs went missing, as did white fencing. But we were among the lucky ones—no major buildings were lost and no people or animals were injured.

Two farms over, the five-bin corn storage unit took a direct hit. Two 120-foot tall elevators that lift grain to the top (called legs, although the anatomy analogy makes no sense) lay in a crumpled mess.  These bins hold some 240,000 bushels of corn and there are massive amounts of steel involved. The broken legs looked, at 120X scale, like an angry third-grader had deliberately slammed his Lego creations onto the ground. The difference is that the repairs, labor costs, and replacement parts for the bins and legs total $750,000. Farmers soon began re-reading their insurance policies about acts of God, depreciation allowances, and the rules for full versus partial replacement.

The morning following the storm, an eerie calm was soon replaced by a different form of energy.  Other work seemed to stop in a region larger than the storm-hit area.  No one arranged it, but neighbors suddenly appeared at each other’s farmsteads with tractors, loaders, pickups, and chainsaws. Small mountains of brush, trees, and building parts began to emerge, to be burned at a later date—no doubt with generous burn permits being granted by the county.

At the time of the storm, corn was about waist high. Like the trees, it took a serious beating throughout the storm’s path.  The corn stalks were tightly packed in narrow rows as a consequence of the changed density of planting—from 20,000 kernels per acre 20 years ago to 35,000 currently.  (Bags of seed corn containing 80,000 kernels now typically sell in excess of $300, putting seed costs per acre about on a par with the cost of nitrogen fertilizer.) This tightly woven carpet of corn was now leaning at 45 degrees—or worse.  The question was whether the stalks would straighten up. And the answer turns out to be “sort of.”  Many of them are “goose-necked,” a much used word now in farmer conversations. The concern is, IF large ears develop, will the stalks be sturdy enough to support them? Or, will a large amount of “ear droppage” seriously reduce yields and profits? We continue to be optimistic, and are still hoping for corn yields of 190 bushels per acre, not far from our best year of 220 bushels.

Morning coffee conversations at the old limestone café have been fairly somber affairs this summer. (The general store has changed hands, but unfortunately, the watery coffee and the stale cookies have not improved.)  Farmer faces were grim even before the storm, mainly because of what has happened to corn prices.  In August 2012, local farmers were being offered $7.65/bushel [56 pounds] of corn; in August 2013, the price was $6.20/bushel, and on August 20, 2014, the price was $3.60/bushel.  Suddenly the rush to buy new pick-ups and large harvesting equipment slowed drastically.  John Deere, the major farm-equipment manufacturer, has already laid off hundreds of workers at various Iowa sites.

Orders have not stopped entirely, however, largely because of crop insurance.  Virtually all farmers have either 75% or 85% revenue protection. If a combination of yield and/or price declines cause revenue to be less than 75% (85%) of normal, farmers are reimbursed by private insurance companies. The premiums for this revenue-protection insurance are heavily subsidized by the federal farm program. Taxpayers underwrite more than 60% of the total insurance premiums, which last year resulted in subsidies to farmers of about $9 billion. Historic yields are used in the insurance contract, and this year the early insurance lock-in price was $4.62/bushel. That price looked low in the spring, but now looks extremely favorable.  Unfortunately, many of my neighbors chose the “wrong” insurance option. They were able to purchase 75% revenue protection for about $4.50/acre, whereas the 85% protection cost about $19/acre. For a farmer with 1500 acres of corn, the difference in insurance premiums was more than $20,000.  But given declining corn prices, the cheaper insurance option for 2014 will surely turn out to be the most costly choice at the end of the season.  Farm decision making these days is mostly about risk management, and that is why crop insurance was such a big element in the new farm program.

Perhaps the hottest topic of conversation at morning coffee centered again on wind, but not of the tornado variety.  It turns out that “the wind comes sweeping down the plain” in Iowa as well as in Oklahoma. Iowa is the third-largest producer of wind energy, and wind power supplies a hefty 27 percent of Iowa’s total energy use. So why are my neighbors upset?  It is something called the Rock Island Clean Line (RICL), and a bit of history is in order.
 

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The old Rock Island Line was a rail company—made more famous than it really deserved to be by Johnny Cash. The line ran five miles south of our farm, and yes, it was a “mighty fine line” that did carry cows, sheep, pigs, and mules. But it went bankrupt in 1975. The Rock Island Clean Line originally planned to use some of the old right-of- way for quite a different purpose—transporting wind-generated power from northwest Iowa on huge towers, with cables carrying direct-current electricity into the Illinois market to the east. It turned out, however, that too much of the old right of way went through urban areas and was unsuitable, so RICL will purchase some 500 linear miles of farmland right-of-way for the towers.

Farmers are rationally and irrationally furious. (The line was originally scheduled to go across the full length of our farm, so we have been directly involved in the discussions.) It has been extremely difficult to get straight answers about the line, with the company and the Iowa Utilities Board doing a dance in which neither wants to lead. There is no doubt that these140-foot towers create an ugly line of sight; they complicate farming with large machinery; and they seriously impact adjoining fields during the construction phase.  The company believes that it is offering generous one-time compensation—the equivalent of $10,000 to $15,000 per acre in most cases—but it then retains easement rights to this land forever, including the authority to sell the rights. Farmers are livid—they basically do not want the line from which they will receive no benefits—but they are being faced with potential eminent domain proceedings if they do not agree to sell. All sorts of NIMBY arguments are being brought forward, from the “government can’t tell us what to do,” to “the lines will emit electrical forces that will cause health effects,” to “they are not paying enough,” to “why should we use good Iowa soil to transport electricity rather than to produce food for the hungry?” The last of these comments is the one I have heard most often. When I inquired as to whether the coffee group was also against ethanol—since 40% of Iowa corn is going into gas tanks rather than hungry mouths—I was NOT regarded as a helpful contributor to the conversation!

In the end, I suspect that the Rock Island Clean Line will prevail, and that farmers and their families will learn to accommodate the power towers. Many farmers will grumble publically, but smile privately en route to their banks with rather large checks. However, both the process and outcome have stirred up deep passions about who controls the land.

Not all farmers are sad this summer, and the winds of good fortune have blown in the direction of cattle feeders.  The structure of cattle feeding in Iowa has changed enormously in recent times. I am the son of a mid-sized feeder, and spent a good deal of my youth working with cattle and driving cattle trucks.  Most east Iowa farms these days are strictly grain farms, in large part to free farmers from the 24/7 burden of animal care. My neighbor talks about his corn-Texas crop rotation—growing corn in the summer and going to Texas for the winter.
 

Two black angus calves.


There are only two large cattle feeding operations left in Linn County where I live, and both are within four miles of our farm.  I was invited by one of the owners to attend a cattle auction with him, and to see for myself just how much things had changed.  He owns his own 18-wheeler, and almost every week takes a load (36 head) of prime beef to the auction.  Cattle are taken to the auction pens the night before the sale and are taken off of feed and water. These steers weigh between 1400 and 1500 pounds, and buyers want assurance that the animals have not gorged on feed and water just before crossing the scales. The cattle are weighed early the morning of the sale, and weights are then flashed on a scoreboard as the animals enter the sale ring.

There is still an amazing amount of ritual at a cattle auction—I had forgotten just how much! Prime steers are typically sold in lots of 12 animals. They enter the ring from one side, and are moved about by a “ring man” so that buyers can get a good view of them. Part of the ritual is where various people sit.  A small group of farmers/sellers sits in one section, typically bantering about whom has the best cattle and whose will “top the sale.” The buyers sit near the top of the bleachers, in the same spot each week, but separated from each other.  (They would not want a casual conversation between them to be construed as collusion!) There is also the auctioneer with his chatter, mile-a-minute delivery, and selling antics. The sale itself happens very rapidly. There are typically two to four bidders for a particular lot of animals, and the bids go back and forth among them at lightning speed. The bidding cues are highly personalized—one buyer uses the flip of his tally sheet, another raises his index finger, and one simply arches his eyebrow.  In less than 45 seconds, the winning buyer has spent $27,000! And then the next lot appears.  Cattle from this sale went to packing plants in Wisconsin, Iowa, Nebraska, and Illinois.

On the 25-mile ride home, my neighbor talked about how pleased he was with what had happened. His steers had gained well and had topped the market in terms of price at $1.57 per pound. He said that corn was very cheap, as was distiller’s grain—the high protein by-product from making corn-based ethanol—which is now an important part of cattle feeding rations. There would be a healthy profit from this load of steers that had grossed about $80,000. 

But then he turned somber.  What should he do about next year? The price of 600-pound calves that he would put into the feedlot for feeding and sale next year are selling at the astronomical price of $2.50 per pound and even higher.  Perhaps next year, he said, was the year to stay out of the ring and go to Texas or Arizona for the winter. Risk had reared its ugly head once again. But my neighbor is first and foremost a cattle feeder, with a cattle feeder’s mindset toward risk. My conjecture is that he will somehow find a rationale for purchasing replacement calves, and that he will do everything all over again next year.                                                 

“The answer my friend, is blowin’ in the wind,

The answer is blowin’ in the wind.”

(Bob Dylan, 1962)

 

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Farming practices in China could be designed to simultaneously improve yields and reduce environmental damages substantially, according to a new study by Stanford biology professor Peter Vitousek and a team of his colleagues at China Agricultural University.

Vitousek is the Clifford G. Morrison Professor in Population and Resource Studies in the Department of Biology and is a faculty affiliate of the Center on Food Security and the Environment at Stanford University. He also is a senior fellow at the Stanford Woods Institute for the Environment and is a professor, by courtesy, in the School of Earth Science’s Department of Environmental Earth System Science.

The research paper, published in Nature, compared current farming practices for staple crops corn, wheat and rice in Eastern and Southern China to three alternative approaches:

• incremental improvements of the current method, aimed at boosting crop growth and improving environmental quality;

• a yield-maximizing approach with no regard to either financial or environmental costs; and

• an "integrated soil-crop system management" (ISSM) approach that used crop models to redesign the production system.

The integrated soil-crop system approach aims to tailor decisions like crop selection, planting, sowing, and nutrient management to each field’s conditions in order both to enhance yields and to minimize environmental damage.

Nitrogen fertilizer is used extensively in modern agriculture – and nowhere more than in China.  Overall, Chinese farmers overuse fertilizer, with much of it ultimately polluting the air and water and contributing to hundreds of thousands of premature deaths each year. The production and transport of fertilizer also contributes significantly to agriculture's share of greenhouse gas emissions that fuel climate change. 

In total, the team tested the four farming methods in 153 site-years of experiments between 2009 and 2012 in widely distributed sites within China’s regions of intensive agriculture. Of the four methods, the yield-maximizing approach produced the highest yields of corn, wheat and rice. Yields from ISSM treatment were a close second, reaching 97-99% of the levels seen in yield-maximizing fields. Crops grown in the ISSM approach also required much less fertilizer, and used it much more efficiently, resulting in nearly no wasted nitrogen and significantly lower greenhouse gas emissions.
 

quzhou 1 2 Stanford professor Peter Vitousek with a team of colleagues in China at an agricultural experiment station.


 “This is exciting work, because the joint challenges of increasing agricultural yields and reducing the environmental costs of agriculture are particularly stark in China – which has less farmland than the United States, a population that’s four times greater, and really horrendous levels of air and water pollution,” Vitousek said.  “If we can combine much higher yields with much lower environmental consequences in China, there is real hope that those challenges can be met around the world.  It’s globally significant that agricultural science in China is meeting these challenges in fundamental ways, and it’s a pleasure to collaborate with our colleagues there.”

The authors predict that if farmers can reach even 80% of the yields seen in the study's ISSM test fields by 2030 (when China’s human population will reach its peak), on the same amount of land that Chinese farmers cultivated in 2012, grain production could then meet demand for both human and animal consumption. This would help ensure food security in China and make China’s role in global food markets to more deliberate and predictable. At the same time, nitrogen losses could be cut by nearly half, thereby saving many lives, and total greenhouse gas emission could fall by one quarter. Moreover, the ISSM approach could be applied in other areas of the world, where it would boost global yields of major grain crops on existing farmland, while simultaneously reducing nitrogen use, greenhouse gas emissions, and economic costs to farmers.

Contact:

Peter Vitousek: vitousek@stanford.edu, (650) 725-1866

Laura Seaman: lseaman@stanford.edu, (650) 723-4920

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A new study compares current farming practices in China for staple crops to alternative approaches that can increase yield and lower environmental damage.
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Graduate Student, Civil and Environmental Engineering
SCPKU Pre-Doctoral Fellow, Fall 2014
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Department of Civil and Environmental Engineering
285B Yang & Yamazaki Energy and Environment Building
473 Via Ortega
Stanford, California 94305-4020

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Assistant Professor of Civil and Environmental Engineering
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Professor Lepech's research focuses on the integration of sustainability indicators into engineering design, ranging from materials design, structural design, system design, to operations management. Such sustainability indicators include a comprehensive set of environmental, economic, and social costs. Recently his research has focused on the design of sustainable high performance fiber-reinforced cementitious composites (HPFRCCs) and fiber-reinforced polymers (FRPs), the impacts of sustainable materials on building and infrastructure design and operation, and the development of new life cycle assessment (LCA) applications for building systems, transportation systems, water systems, consumer products. Along with this he is studying the effects that slowly diffusing sustainable civil engineering innovations, and the social networks they diffuse through, can have on achieving long term sustainability goals.

Michael joined the Stanford University Department of Civil and Environmental Engineering faculty from the University of Michigan's Center for Sustainable Systems where he was a research fellow at the School of Natural Resources and Environment. He received his PhD in Materials Engineering from the Department of Civil and Environmental Engineering at the University of Michigan, Ann Arbor. He also received his MSE in Structural Engineering from the Department of Civil and Environmental Engineering at the University of Michigan, Ann Arbor and his MBA in Strategy from the Stephen M. Ross School of Business at the University of Michigan, Ann Arbor. His industry experience lies in the design and construction of interstate highways and bridges, along with the design and construction of residential high rises in seismic zones.

Faculty Fellow at the Stanford Center at Peking University, December 2014 and July to August of 2015
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In many discussions of climate change impacts in agriculture, the large magnitudes of expected impacts toward the end of the century are used to emphasize that most of the risks are to future generations. However, this perspective misses the important fact that demand growth for food is expected to be much slower after 2050 than before it, and that the next two decades represent the bulk of growth before 2050. Thus, impacts of smaller magnitude in the near-term can be as or more consequential for food prices or food security as larger magnitude impacts in the future. Here we estimate the risks that climate trends over the next 10 or 20 years could have large impacts on global yields of wheat and maize, with a focus on scenarios that would cut the expected rates of yield gains in half. We find that because of global warming, the chance of climate trends over a 20 year period causing a 10% yield loss has increased from a less than 1 in 200 chance arising from internal climate variability alone, to a 1 in 10 chance for maize and 1 in 20 chance for wheat. Estimated risks for maize are higher because of a greater geographic concentration than wheat, as well as a slightly more negative aggregate temperature sensitivity. Global warming has also greatly increased the chance of climate trends large enough to halve yield trends over a 10 year period, with a roughly 1 in 4 chance for maize and 1 in 6 chance for wheat. Estimated risks are slightly larger when using climate projections from a large ensemble of a single climate model that more fully explores internal climate variability, than a multi-model ensemble that more fully explores model uncertainty. Although scenarios of climate impacts large enough to halve yield growth rates are still fairly unlikely, they may warrant consideration by institutions potentially affected by associated changes in international food prices.

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Environmental Research Letters
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David Lobell
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Stratospheric injection of sulphate aerosols has been advocated as an emergency geoengineering measure to tackle dangerous climate change, or as a stop-gap until atmospheric carbon dioxide levels are reduced. But it may not prove to be the game-changer that some imagine.

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Nature Climate Change
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Eric Lambin
Rosamond L. Naylor
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• Adaptation should be defined strictly as actions that reduce climate change impacts.

• Many studies that claim to show adaptation benefits do not satisfy this definition.
• Three main causes of “adaptation illusions” are discussed.

A primary goal of studying climate change adaptation is to estimate the net impacts of climate change. Many potential changes in agricultural management and technology, including shifts in crop phenology and improved drought and heat tolerance, would help to improve crop productivity but do not necessarily represent true adaptations. Here the importance of retaining a strict definition of adaptation – as an action that reduces negative or enhances positive impacts of climate change – is discussed, as are common ways in which studies misinterpret the adaptation benefits of various changes. These “adaptation illusions” arise from a combination of faulty logic, model errors, and management assumptions that ignore the tendency for farmers to maximize profits for a given technology. More consistent treatment of adaptation is needed to better inform synthetic assessments of climate change impacts, and to more easily identify innovations in agriculture that are truly more effective in future climates than in current or past ones. Of course, some of the best innovations in agriculture in coming decades may have no adaptation benefits, and that makes them no less worthy of attention.

 

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Global Food Security
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David Lobell
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Improving the environment for business is an important part of the growth strategy of Abenomics. As the goal for this effort, the Abe Administration aims to improve Japan’s rank in the World Bank Doing Business Ranking to one of the top three among OECD. This paper clarifies what it takes for Japan to achieve the goal. By looking at details of the World Bank Doing Business ranking, we identify various reforms that Japan could implement to improve the ranking. Then, we classify the reforms into six groups depending on whether the reform requires legal changes and on political resistance that the reform is likely to face. By just doing the reforms that do not require legal changes and are not likely to face strong political opposition, Japan can improve the ranking to 13th. To be in the top 3, Japan would need to implement all the reforms that are not likely to face strong political resistance. The conclusions, however, are based on the assumption that the conditions in the other countries do not change, which is unrealistic. Thus, Japan would need to carry out all the reforms including those with high political resistance to be among the top three.

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Takeo Hoshi
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From May 13-15, the Center on Food Security and the Environment and the Lenfest Ocean Program welcomed leading Chinese and international scientists to the Stanford Center at Peking University in Beijing, to share research and insights on the role of ocean fisheries, aquaculture, and marine ecosystems for improving food security in China.

Given China’s demographic changes, evolving nutritional requirements, and dominant role in global fisheries, the key question of the symposium was whether marine ecosystems can be managed adequately to support the country’s future vision for domestic food security.

Nearly 30 participants from around the world shared research on the provision of wild fish for direct human consumption and for animal feeds. Participants also shared insights on China’s aquaculture sector, including the tradeoffs involved in using wild fish in aquaculture feed.

Agenda

Session I – Food security and marine ecosystems

Session II – Aquaculture, feeds and fisheries

Session III - Coastal fisheries & impacts on marine ecosystems

Session IV – Economies of the global marine fish trade

Session V - Critical issues and challenges 

Stanford Center at Peking University

The Jerry Yang and Akiko Yamazaki
Environment and Energy Building
Stanford University
473 Via Ortega, Office 363
Stanford, CA 94305

(650) 723-5697 (650) 725-1992
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Senior Fellow, Stanford Woods Institute and Freeman Spogli Institute for International Studies
William Wrigley Professor of Earth System Science
Senior Fellow and Founding Director, Center on Food Security and the Environment
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Rosamond Naylor is the William Wrigley Professor in Earth System Science, a Senior Fellow at Stanford Woods Institute and the Freeman Spogli Institute for International Studies, the founding Director at the Center on Food Security and the Environment, and Professor of Economics (by courtesy) at Stanford University. She received her B.A. in Economics and Environmental Studies from the University of Colorado, her M.Sc. in Economics from the London School of Economics, and her Ph.D. in applied economics from Stanford University. Her research focuses on policies and practices to improve global food security and protect the environment on land and at sea. She works with her students in many locations around the world. She has been involved in many field-level research projects around the world and has published widely on issues related to intensive crop production, aquaculture and livestock systems, biofuels, climate change, food price volatility, and food policy analysis. In addition to her many peer-reviewed papers, Naylor has published two books on her work: The Evolving Sphere of Food Security (Naylor, ed., 2014), and The Tropical Oil Crops Revolution: Food, Farmers, Fuels, and Forests (Byerlee, Falcon, and Naylor, 2017).

She is a Fellow of the Ecological Society of America, a Pew Marine Fellow, a Leopold Leadership Fellow, a Fellow of the Beijer Institute for Ecological Economics, a member of Sigma Xi, and the co-Chair of the Blue Food Assessment. Naylor serves as the President of the Board of Directors for Aspen Global Change Institute, is a member of the Scientific Advisory Committee for Oceana and is a member of the Forest Advisory Panel for Cargill. At Stanford, Naylor teaches courses on the World Food Economy, Human-Environment Interactions, and Food and Security. 

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