Dennis R. Keeney | |
---|---|
Born | July 2, 1937 |
Citizenship | American |
Alma mater | Iowa State University (ISU) |
Known for | First Director of the Leopold Center for Sustainable Agriculture at ISU, Ames, IA |
Scientific career | |
Fields | agronomy, soil science, water chemistry |
Dennis R. Keeney (born July 2, 1937) is an American scientist in soil science and water chemistry. He was the first director of the Leopold Center for Sustainable Agriculture in Ames, Iowa. He served as president of the Soil Science Society of America and the American Society of Agronomy. In 2000, he was awarded the Charles A. Black Award by the Council for Agricultural Science and Technology (CAST). [1]
Keeney grew up on his family's dairy farm near Runnells, Iowa not far from Des Moines. [2] Per Keeney "the farm you grew up on, at least for a couple of generations, was named after the family that lived there. It became a sense of place that we really miss, because now agriculture is large corporate farms that have no sense of place. It’s a way of life that is largely gone." [3]
He graduated from Iowa State University (ISU) with a B.S. in agronomy. He studied soil science at University of Wisconsin and obtained an M.S., followed by a Ph.D. in agronomy and biochemistry from Iowa State University. [2]
Keeney became a professor of agronomy, and stayed on as faculty member in soils and water chemistry for more than 20 years. [4]
In 1987, the Leopold Center for Sustainable Agriculture was established at ISU, and in 1988 he became its first director. The Leopold Center developed research studies and teaching about the environmental impacts of farming, sustainable agriculture, preservation of natural resources, including soil and water quality, and rural community development. Keeney defined sustainable agriculture as
"It means using the resources we have wisely. Probably number one to conserve the soil resource, the water resource, and the land resource. It's a Leopold concept really, because Leopold talked about land as the water, the air, the soil, and the animals living on it."
Already in 1988 Keeney examined the energy balance of ethanol fuel as a "renewable" fuel and concluded, that more energy was required to produce ethanol than was retrieved from it then. [5] Keeney retired from the Leopold Center in 1999. [4] He was succeeded by Fred Kirschenmann. [6]
With the corn ethanol industry rapidly expanding between 2000 and 2005, in what Keeney called "...an "irrational exuberance" trip with biofuels" he was one of few Iowa scientists looking at water consumption. [7] In 2009, Keeney published his latest peer-reviewed paper on the "Environmental, social, economic, and food issues brought on by the rapidly expanding ethanol-from-corn industry in the United States". [8] As of 2014 [update] he has continued to publicly question its benefits. [5]
He was president of the Soil Science Society of America in 1988 [9] and the American Society of Agronomy in 1993. [10] [11] In 1998, he was awarded the Charles A. Black Award by the Council for Agricultural Science and Technology (CAST). [12]
As of 2015 [update] he consults as a Senior Fellow for the Institute for Agriculture and Trade Policy in Minneapolis and the Department of Soil, Air and Water at the University of Minnesota. He is a visiting scholar for the Center for a Livable Future, Johns Hopkins University. [13]
In February 2015 his memoir “The Keeney Place: A Life in the Heartland” was published after nine years of work. [4]
Keeney has published over 140 peer reviewed papers on soil and water quality research.
Agricultural science is a broad multidisciplinary field of biology that encompasses the parts of exact, natural, economic and social sciences that are used in the practice and understanding of agriculture. Professionals of the agricultural science are called agricultural scientists or agriculturists.
George Washington Carver was an American agricultural scientist and inventor who promoted alternative crops to cotton and methods to prevent soil depletion. He was one of the most prominent black scientists of the early 20th century.
Intensive agriculture, also known as intensive farming, conventional, or industrial agriculture, is a type of agriculture, both of crop plants and of animals, with higher levels of input and output per unit of agricultural land area. It is characterized by a low fallow ratio, higher use of inputs such as capital, labour, agrochemicals and water, and higher crop yields per unit land area.
Agronomy is the science and technology of producing and using plants by agriculture for food, fuel, fiber, chemicals, recreation, or land conservation. Agronomy has come to include research of plant genetics, plant physiology, meteorology, and soil science. It is the application of a combination of sciences such as biology, chemistry, economics, ecology, earth science, and genetics. Professionals of agronomy are termed agronomists.
The following outline is provided as an overview of and topical guide to sustainable agriculture:
Agroecology is an academic discipline that studies ecological processes applied to agricultural production systems. Bringing ecological principles to bear can suggest new management approaches in agroecosystems. The term can refer to a science, a movement, or an agricultural practice. Agroecologists study a variety of agroecosystems. The field of agroecology is not associated with any one particular method of farming, whether it be organic, regenerative, integrated, or industrial, intensive or extensive, although some use the name specifically for alternative agriculture.
Aldo Leopold was an American writer, philosopher, naturalist, scientist, ecologist, forester, conservationist, and environmentalist. He was a professor at the University of Wisconsin and is best known for his book A Sand County Almanac (1949), which has been translated into fourteen languages and has sold more than two million copies.
Biodynamic agriculture is a form of alternative agriculture based on pseudo-scientific and esoteric concepts initially developed in 1924 by Rudolf Steiner (1861–1925). It was the first of the organic farming movements. It treats soil fertility, plant growth, and livestock care as ecologically interrelated tasks, emphasizing spiritual and mystical perspectives.
Natural Resources Conservation Service (NRCS), formerly known as the Soil Conservation Service (SCS), is an agency of the United States Department of Agriculture (USDA) that provides technical assistance to farmers and other private landowners and managers.
Cellulosic ethanol is ethanol produced from cellulose rather than from the plant's seeds or fruit. It can be produced from grasses, wood, algae, or other plants. It is generally discussed for use as a biofuel. The carbon dioxide that plants absorb as they grow offsets some of the carbon dioxide emitted when ethanol made from them is burned, so cellulosic ethanol fuel has the potential to have a lower carbon footprint than fossil fuels.
Corn stover consists of the leaves, stalks, and cobs of corn (maize) plants left in a field after harvest. Such stover makes up about half of the yield of a corn crop and is similar to straw from other cereal grasses; in Britain it is sometimes called corn straw. Corn stover is a very common agricultural product in areas of large amounts of corn production. As well as the non-grain part of harvested corn, the stover can also contain other weeds and grasses. Field corn and sweet corn, two different types of maize, have relatively similar corn stover.
The Soil Science Society of America (SSSA), is the largest soil-specific society in the United States. It was formed in 1936 from the merger of the Soils Section of the American Society of Agronomy and the American Soil Survey Association. The Soils Section of ASA became the official Americas section of the International Union of Soil Sciences in 1934, a notable role which SSSA continues to fulfill.
In order to create ethanol, all biomass needs to go through some of these steps: it needs to be grown, collected, dried, fermented, and burned. All of these steps require resources and an infrastructure. The ratio of the energy released by burning the resulting ethanol fuel to the energy used in the process, is known as the ethanol fuel energy balance and studied as part of the wider field of energy economics. Figures compiled in a 2007 National Geographic Magazine article point to modest results for corn (maize) ethanol produced in the US: 1 unit of energy input equals 1.3 energy units of corn ethanol energy. The energy balance for sugarcane ethanol produced in Brazil is much more favorable, 1 to 8. Over the years, however, many reports have been produced with contradicting energy balance estimates. A 2006 University of California Berkeley study, after analyzing six separate studies, concluded that producing ethanol from corn uses marginally less petroleum than producing gasoline.
Sustainable biofuel is biofuel produced in a sustainable manner. It is not based on petroleum or other fossil fuels. It includes not using plants that are used for food stuff to produce the fuel thus disrupting the world's food supply.
Issues relating to biofuel are social, economic, environmental and technical problems that may arise from biofuel production and use. Social and economic issues include the "food vs fuel" debate and the need to develop responsible policies and economic instruments to ensure sustainable biofuel production. Farming for biofuels feedstock can be detrimental to the environment if not done sustainably. Environmental concerns include deforestation, biodiversity loss and soil erosion as a result of land clearing for biofuels agriculture. While biofuels can contribute to reduction in global carbon emissions, indirect land use change for biofuel production can have the inverse effect. Technical issues include possible modifications necessary to run the engine on biofuel, as well as energy balance and efficiency.
Paul B. Thompson is Professor Emeritus at Michigan State University, where he held the W.K. Kellogg Chair in Agricultural Food and Community Ethics before retiring in 2022. Thompson was born in 1951 in Springfield, Missouri. He earned his B.A. at Emory University before going on to earn a Ph.D. in philosophy at the State University of New York at Stony Brook. He formerly taught at Texas A&M University and Purdue University before joining MSU, where he continues to do research on ethical and philosophical questions dealing with agriculture and food and especially the development of agricultural techno-science.
Johannes "Hans" van Leeuwen is educator, engineer, inventor, researcher, and entrepreneur. He is an emeritus professor of Civil, Construction and Environmental Engineering at Iowa State University and an entrepreneur in ethanol co-product development. His research and innovations have worked to solve various problems including, new water purification methods, a way of creating food and animal feed from waste, and a process in making the purest alcohol ever made.
Gerald Arey Miller is an American agronomist, professor, and associate dean emeritus at Iowa State University, former director of its Agriculture and Natural Resources Extension, and former Project Director for the Heartland Regional Water Coordination Initiative in Iowa. He held the rank of Major General in the United States Army.
Paul Wesley Johnson was an American writer, policymaker, and environmentalist.
David J. Mulla is an American soil scientist. He played an role in the organization of the International Conference on Precision Agriculture (ICPA), which started as a small workshop in Minneapolis in the early 1990s and developed into the International Society of Precision Agriculture (ISPA). Until 2008, the meetings of the ICPA were hosted by the University of Minnesota. In 2013, he published a review of advances in remote sensing for precision agriculture.