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Full-Text Articles in Life Sciences
Descriptions Of Life-Stages Of Blastobasis Repartella (Lepidoptera: Gelechioidea: Coleophoridae: Blastobasinae) And Observations On Its Biology In Switchgrass, D. Adamski, P. J. Johnson, A. A. Boe, Jeffrey Bradshaw, Alan Pultyniewicz
Descriptions Of Life-Stages Of Blastobasis Repartella (Lepidoptera: Gelechioidea: Coleophoridae: Blastobasinae) And Observations On Its Biology In Switchgrass, D. Adamski, P. J. Johnson, A. A. Boe, Jeffrey Bradshaw, Alan Pultyniewicz
Arvid Boe
Blastobasis repartella (Dietz) is a borer in the proaxis and basal nodes and internodes of above ground stems of Panicum virgatum L. (Poaceae). The adult and immature stages are described herein, including diagnoses of the adult and larva, as this insect may be easily confused with a closely related grass-feeding congener, Blastobasis graminea Adamski, which is also known to occur in the United States. The biology of B. repartella is described. Figures of the adult, illustrations of the male and female genitalia, wing venation, the chaetotaxy of the larva (supplemented with scanning electron micrographs), and pupa are provided. Bassus difficilis …
Symptoms, Distribution And Abundance Of The Stem-Boring Caterpillar, Blastobasis Repartella (Dietz), In Switchgrass, Jarrad R. Prasifka, Jeffrey Bradshaw, Arvid A. Boe, Dokyoung Lee, David Adamski, Michael E. Gray
Symptoms, Distribution And Abundance Of The Stem-Boring Caterpillar, Blastobasis Repartella (Dietz), In Switchgrass, Jarrad R. Prasifka, Jeffrey Bradshaw, Arvid A. Boe, Dokyoung Lee, David Adamski, Michael E. Gray
Arvid Boe
A potential pest of switchgrass, Panicum virgatum L., was first detected in South Dakota in 2004, where death of partially emerged leaves was noted in a small proportion of tillers. Similar “dead heart” symptoms were observed in switchgrass in Illinois during 2008 and adults of a stem-boring caterpillar were collected and identified as Blastobasis repartella (Dietz). In 2009, a survey of the central United States was used to estimate the distribution and abundance of this insect. In eight northern states, B. repartella was consistently found in both cultivated plots and natural stands of switchgrass. In four southern states, B. repartella …
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
William Edwards
Iowa's farmland consists of over 16% hay crops and pastureland, a significant portion of which is under cash rental contracts. This study investigates the comparative relationships between cash rental rates for cropped land and non-cropped land, where the latter includes hay and pastureland. We find that higher crop prices resulting from biofuel demand induces land use conversion from non-cropped land to crop production and thus bids up non-cropped land rents. Compared with changes in cropped land cash rents, non-cropped farmland rents could increase by a higher percentage. Non-cropped land cash rental rates are largely determined by crop and feeder cattle …
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
William Edwards
Iowa's farmland consists of over 16% hay crops and pastureland, a significant portion of which is under cash rental contracts. This study investigates the comparative relationships between cash rental rates for cropped land and non-cropped land, where the latter includes hay and pastureland. We find that higher crop prices resulting from biofuel demand induces land use conversion from non-cropped land to crop production and thus bids up non-cropped land rents. Compared with changes in cropped land cash rents, non-cropped farmland rents could increase by a higher percentage. Non-cropped land cash rental rates are largely determined by crop and feeder cattle …
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
William Edwards
Iowa's farmland consists of over 16% hay crops and pastureland, a significant portion of which is under cash rental contracts. This study investigates the comparative relationships between cash rental rates for cropped land and non-cropped land, where the latter includes hay and pastureland. We find that higher crop prices resulting from biofuel demand induces land use conversion from non-cropped land to crop production and thus bids up non-cropped land rents. Compared with changes in cropped land cash rents, non-cropped farmland rents could increase by a higher percentage. Non-cropped land cash rental rates are largely determined by crop and feeder cattle …
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
Does A Rising Biofuels Tide Raise All Boats? A Study Of Cash Rent Determinants For Iowa Farmland Under Hay And Pasture, Xiaodong Du, David A. Hennessy, William M. Edwards
William Edwards
Iowa's farmland consists of over 16% hay crops and pastureland, a significant portion of which is under cash rental contracts. This study investigates the comparative relationships between cash rental rates for cropped land and non-cropped land, where the latter includes hay and pastureland. We find that higher crop prices resulting from biofuel demand induces land use conversion from non-cropped land to crop production and thus bids up non-cropped land rents. Compared with changes in cropped land cash rents, non-cropped farmland rents could increase by a higher percentage. Non-cropped land cash rental rates are largely determined by crop and feeder cattle …
Balancing Limiting Factors & Economic Drivers For Sustainable Midwestern Us Agricultural Residue Feedstock Supplies, Wally W. Wilhelm, J. Richard Hess, Douglas L. Karlen, Jane M. F. Johnson, David J. Muth Jr., John M. Baker, Hero T. Gollany, Jeff M. Novak, Diane E. Scott, Gary E. Varvel
Balancing Limiting Factors & Economic Drivers For Sustainable Midwestern Us Agricultural Residue Feedstock Supplies, Wally W. Wilhelm, J. Richard Hess, Douglas L. Karlen, Jane M. F. Johnson, David J. Muth Jr., John M. Baker, Hero T. Gollany, Jeff M. Novak, Diane E. Scott, Gary E. Varvel
David J. Muth
Advanced biofuels will be developed using cellulosic feedstock rather than grain or oilseed crops that can also be used for food and feed. To be sustainable, these new agronomic production systems must be economically viable without degrading the soil and other natural resources. This review examines six agronomic factors that collectively define many of the limits and opportunities for harvesting crop residue for biofuel feedstock in the midwestern United States. The limiting factors include soil organic carbon, wind and water erosion, plant nutrient balance, soil water and temperature dynamics, soil compaction, and off-site environmental impacts. These are discussed in relationship …
Balancing Limiting Factors & Economic Drivers For Sustainable Midwestern Us Agricultural Residue Feedstock Supplies, Wally W. Wilhelm, J. Richard Hess, Douglas L. Karlen, Jane M. F. Johnson, David J. Muth Jr., John M. Baker, Hero T. Gollany, Jeff M. Novak, Diane E. Scott, Gary E. Varvel
Balancing Limiting Factors & Economic Drivers For Sustainable Midwestern Us Agricultural Residue Feedstock Supplies, Wally W. Wilhelm, J. Richard Hess, Douglas L. Karlen, Jane M. F. Johnson, David J. Muth Jr., John M. Baker, Hero T. Gollany, Jeff M. Novak, Diane E. Scott, Gary E. Varvel
Douglas L Karlen
Advanced biofuels will be developed using cellulosic feedstock rather than grain or oilseed crops that can also be used for food and feed. To be sustainable, these new agronomic production systems must be economically viable without degrading the soil and other natural resources. This review examines six agronomic factors that collectively define many of the limits and opportunities for harvesting crop residue for biofuel feedstock in the midwestern United States. The limiting factors include soil organic carbon, wind and water erosion, plant nutrient balance, soil water and temperature dynamics, soil compaction, and off-site environmental impacts. These are discussed in relationship …
Physical And Chemical Properties Of Corn Distillers Wet Grains, Kurt A. Rosentrater, R. Michael Lehman
Physical And Chemical Properties Of Corn Distillers Wet Grains, Kurt A. Rosentrater, R. Michael Lehman
Kurt A. Rosentrater
The production of corn-based ethanol in the United States is dramatically increasing, and consequently, so is the quantity of generated coproducts, all of which are currently fed to livestock. Distillers Wet Grain (DWG) is one of these coproduct feeds. Many studies have investigated the nutritional properties of DWG and the response of livestock (primarily beef and dairy) to inclusion of these ingredients in their diets. To date, physical properties have been largely ignored, but they are needed for the design of storage facilities and equipment. The objective of this research was to quantify physical and chemical property values for typical …
Concentration Of Key Elements In North American Meat & Bone Meal, Rafael A. Garcia, Kurt A. Rosentrater
Concentration Of Key Elements In North American Meat & Bone Meal, Rafael A. Garcia, Kurt A. Rosentrater
Kurt A. Rosentrater
Meat & bone meal (MBM) and related rendered protein commodities have potential for use in applications other than animal feed, including use as a fuel or a phosphorus fertilizer. In order to develop these applications, data on the elemental composition are required; the currently available elemental composition data have important limitations. To generate more appropriate and reliable data, MBM samples were collected from 17 North American rendering plants, carefully prepared and analyzed for 20 elements. Preliminary studies showed that the sample preparation process artificially increased levels of sulfur and nickel in a manner that was correctable. Concentrations of many elements …
Microbial Development In Distillers Wet Grains Produced During Fuel Ethanol Production From Corn (Zea Mays), R. Michael Lehman, Kurt A. Rosentrater
Microbial Development In Distillers Wet Grains Produced During Fuel Ethanol Production From Corn (Zea Mays), R. Michael Lehman, Kurt A. Rosentrater
Kurt A. Rosentrater
Distillers grains are coproduced with ethanol and carbon dioxide during the production of fuel ethanol from the dry milling and fermentation of corn grain, yet there is little basic microbiological information on these materials. We undertook a replicated field study of the microbiology of distillers wet grains (DWG) over a 9 day period following their production at an industrial fuel ethanol plant. Freshly produced DWG had a pH of about 4.4, a moisture content of about 53.5% (wet mass basis), and 4 x 10(5) total yeast cells/g dry mass, of which about 0.1% were viable. Total bacterial cells were initially …