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Submissions from 2016

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Partitioning evaporation and transpiration in a maize field using heat-pulse sensors for evaporation measurement, X. Xiao, T. J. Sauer, J. W. Singer, R. Horton, T. Ren, and J. L. Heitman

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Genome-Wide Association Study for Nine Plant Architecture Traits in Sorghum, Jing Zhao, Maria B. Mantilla Perez, Jieyun Hu, and Maria G. Salas Fernandez

Submissions from 2015

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Association analysis of genes involved in maize (Zea mays L.) root development with seedling and agronomic traits under contrasting nitrogen levels, Adel H. Abdel-Ghani, Bharath Kumar, Jordon Pace, Constantin Jansen, Pedro J. Gonzalez-Portilla, Jenaro Reyes-Matamoros, Juan Pablo San Martin, Michael Lee, and Thomas Lubberstedt

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Association of single nucleotide polymorphisms in LpIRI1 gene with freezing tolerance traits in perennial ryegrass, A. Aleliūnas, K. Jonavičienė, G. Statkevičiūtė, D. Vaitiekūnaitė, V. Kemešytė, T. Lubberstedt, and G. Brazauskas

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Recurrent Selection to Alter Grain Phytic Acid Concentration and Iron Bioavailability, Alyssa W. Beavers, A. Susana Goggi, Manju B. Reddy, Adrienne Moran Lauter, and M. Paul Scott

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Terrestrial Ecosystems in a Changing Environment: A Dominant Role for Water, Carl J. Bernacchi and Andy VanLoocke

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Autumnal leaf senescence in Miscanthus × giganteus and leaf [N] differ by stand age, Nicholas N. Boersma, Frank G. Dohleman, Fernando E. Miguez, and Emily A. Heaton

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Medical Oxygen Concentrators for Releasing Seed Dormancy, David M. Brenner, Jack Dekker, Jarad Niemi, and Lisa Pfiffner

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Integrating plant litter quality, soil organic matter stabilization, and the carbon saturation concept, Michael J. Castellano, Kevin E. Mueller, Daniel C. Olk, John E. Sawyer, and Johan Six

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Accumulation of Organic Carbon in Chernozems (Mollisols) under Shelterbelts in Russia and the United States, Yu. G. Chendev, T. J. Sauer, A. N. Gennadiev, L. L. Novykh, A. N. Petin, V. I. Petina, E. A. Zazdravnykh, and C. L. Burras

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History of East European Chernozem Soil Degradation; Protection and Restoration by Tree Windbreaks in the Russian Steppe, Yury G. Chendev, Thomas J. Sauer, Guillermo Hernandez Ramirez, and Charles Lee Burras

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Comparison of Models for Determining Soil-Surface Carbon Dioxide Effluxes in Different Agricultural Systems, Aaron L. Daigh, Thomas Sauer, Xinhua Xiao, and Robert Horton

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Evaluation of spontaneous generation of allelic variation in soybean in response to sexual hybridization and stress, Katherine Espinosa, Jessica Boelter, Susan Lolle, Marianne Hopkins, Susana Goggi, Reid G. Palmer, and Devinder Sandhu

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Comprehensive phenotypic analysis and quantitative trait locus identification for grain mineral concentration, content, and yield in maize (Zea mays L.), Riliang Gu, Fanjun Chen, Bingran Liu, Xin Wang, Jianchao Liu, Pengcheng Li, Qingchun Pang, Jordon Pace, Thomas Lubberstedt, Guohua Mi, and Lixing Yuan

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Mapping the decision points and climate information use of agricultural producers across the U.S. Corn Belt, Tonya Haigh, Eugene S. Takle, Jeffrey Andresen, Melissa Widhalm, J. Stuart Carlton, and Jim Angel

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Genotypic variability in anthocyanins, total phenolics, and antioxidant activity among diverse waxy corn germplasm, Bhornchai Harakotr, Bhalang Suriharn, Marvin P. Scott, and Kamol Lertrat

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Does Nitrogen Fertilizer Application Rate to Corn Affect Nitrous Oxide Emissions from the Rotated Soybean Crop?, Javed Iqbal, David C. Mitchell, Daniel W. Barker, Fernando Miguez, John E. Sawyer, Jose Pantoja, and Michael J. Castellano

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Denitrification and Nitrous Oxide Emissions in Annual Croplands, Perennial Grass Buffers, and Restored Perennial Grasslands, Javed Iqbal, Timothy B. Parkin, Matthew J. Helmers, Xiaobo Zhou, and Michael J. Castellano

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Genetic and agronomic assessment of cob traits in corn under low and normal nitrogen management conditions, Constantin Jansen, Youngzhong Zhang, Hongjun Liu, Pedro J. Gonzalez-Portilla, Nick Lauter, Bharath Kumar, Ignacio Trucillo-Silva, Juan Pablo San Martin, Michael Lee, Kevin Simcox, Jeff Schussler, Kanwarpal Dhugga, and Thomas Lubberstedt

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Effect of Glyphosate Application on Sudden Death Syndrome of Glyphosate-Resistant Soybean Under Field Conditions, Yuba R. Kandel, Carl A. Bradley, Kiersten A. Wise, Martin I. Chilvers, Albert U. Tenuta, Vince M. Davis, Paul D. Esker, Damon L. Smith, Mark A. Licht, and Daren S. Mueller

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Characterization of Sugarcane Mosaic Virus Scmv1 and Scmv2 Resistance Regions by Regional Association Analysis in Maize, Pengfei Leng, Qing Ji, Yongfu Tao, Rania Ibrahim, Guangtang Pan, Mingliang Xu, and Thomas Lubberstedt

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Management and Tillage Infl uence Barley Forage Productivity and Water Use in Dryland Cropping Systems, Andrew W. Lenssen, U. M. Sainju, J. D. Jabro, B. L. Allen, and R. G. Evans

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An ultra-high-density map as a community resource for discerning the genetic basis of quantitative traits in maize, Hongjun Liu, Yongchao Niu, Pedro J. Gonzalez-Portilla, Huangkai Zhou, Liya Wang, Tao Zho, Cheng Qin, Shuaishuai Tai, Constantin Jansen, Yaou Shen, Haijian Lin, Michael Lee, Doreen Ware, Zhiming Zhang, Guangtang Pan, and Thomas Lubberstedt

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Genome-wide comparative analysis of digital gene expression tag profiles during maize ear development, Hongjun Liu, Xuerong Yang, Xinhui Liao, Tao Zuo, Cheng Qin, Shiliang Cao, Ling Dong, Huangkai Zhou, Yongzhong Zhang, Sisi Liu, Yaou Shen, Haijian Lin, Thomas Lubberstedt, Zhiming Zhang, and Guangtang Pan

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The Impact of Genetic Relationship and Linkage Disequilibrium on Genomic Selection, Hongjun Liu, Huangkai Zhou, Youngsheng Wu, Xiao Li, Jing Zhao, Tao Zuo, Xuan Zhang, Yongzhong Zhang, Sisi Liu, Yaou Shen, Haijian Lin, Zhiming Zhang, Victor Abertondo, Michael Lee, Kaijian Huang, Thomas Lubberstedt, and Guangtang Pan

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History of Soil Geography in the Context of Scale, Bradley Allen Miller and R. J. Schaetzl

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Integrating Sheep Grazing into Cereal-Based Crop Rotations: Spring Wheat Yields and Weed Communities, Zach J. Miller, Fabian D. Menalled, Upendra M. Sainju, Andrew W. Lenssen, and Patrick G. Hatfield

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Comparing Nitrate Sink Strength in Perennial Filter Strips at Toeslopes of Cropland Watersheds, David C. Mitchell, Xiaobo Zhou, Timothy B. Parkin, Matthew J. Helmers, and Michael J. Castellano

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Understanding the DayCent model: Calibration, sensitivity, and identifiability through inverse modeling, Magdalena Necpálová, Robert P. Anex, Michael N. Fienen, Stephen J. Del Grosso, Michael J. Castellano, John E. Sawyer, Javed Iqbal, Jose L. Pantoja, and Daniel W. Barker

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Crop models capture the impacts of climate variability on corn yield, Dev Niyogi, Xing Liu, Jeff Andresen, Atul K. Jain, Olivia Kellner, Eugene Takle, and Otto C. Doering

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Corn Nitrogen Fertilization Requirement and Corn–Soybean Productivity with a Rye Cover Crop, Jose L. Pantoja, Krishna P. Woli, John E. Sawyer, and Daniel W. Barker

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Dryland soil chemical properties and crop yields affected by long-term tillage and cropping sequence, Upendra M. Sainju, Brett L. Allen, TheCan Caesar-TonThat, and Andrew W. Lenssen

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Haploid Strategies for Functional Validation of Plant Genes, Yaou Shen, Guangtang Pan, and Thomas Lubberstedt

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Weighing in on a method to discriminate maize haploid from hybrid seed, Andrew Smelser, Michael Blanco, Thomas Lubberstedt, Axel Schechert, Adam Vanous, and Candice Gardner

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Association analysis of five candidate genes with plant height and dry matter yield in perennial ryegrass, Gražina Statkevičiūtė, Andrius Aleliūnas, Vilma Kemešytė, Izolda Pašakinskienė, Thomas Lubberstedt, and Gintaras Brazauskas

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Thin Plate Spline Regression Model Used at Early Stages of Soybean Breeding to Control Field Spatial Variation, M. Sun, A. S. Goggi, K. Matson, R. G. Palmer, K. Moore, and S. R. Cianzio

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ALLMAPS: robust scaffold ordering based on multiple maps, Haibao Tang, Xingtan Zhang, Chenyong Miao, Jisen Zhang, Ray Ming, James C. Schnable, Patrick S. Schnable, Eric Lyons, and Jianguo Lu

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Diversity of Maize Shoot Apical Meristem Architecture and Its Relationship to Plant Morphology, Addie M. Thompson, Jianming Yu, Marja C. P. Timmermans, Patrick S. Schnable, James E. Crants, Michael J. Scanlon, and Gary J. Muehlbauer

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Observing and Simulating the Summertime Low-Level Jet in Central Iowa, Brian J. Vanderwende, Julie K. Lundquist, Michael E. Rhodes, Eugene S. Takle, and Samantha L. Irvin

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Soil Profile Transformation after 50 Years of Agricultural Land Use, Jessica J. Veenstra and C. Lee Burras

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Registration of Temperate Quality Protein Maize (QPM) Lines BQPM9, BQPM10, BQPM11, BQPM12, BQPM13, BQPM14, BQPM15, BQPM16, and BQPM17, Hannah M. Worral, M. Paul Scott, and Arnel R. Hallauer

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Bare Soil Carbon Dioxide Fluxes with Time and Depth Determined by High-Resolution Gradient-Based Measurements and Surface Chambers, X. Xiao, X. Kuang, T. J. Sauer, J. L. Heitman, and R. Horton

Submissions from 2014

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Top-Ranked Priority Research Questions for Soil Science in the 21st Century, Julius B. Adewopo, Christine VanZomeren, Rupesh K. Bhomia, Maya Almaraz, Allan R. Bacon, Emily Eggleston, Jonathan D. Judy, Ricky W. Lewis, Mary Lusk, Bradley Allen Miller, Colby Moorberg, Elizabeth Hodges Snyder, and Mary Lee Tiedeman

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Nitrogen Use in Durum and Selected Brassicaceae Oilseeds in Two-Year Rotations, B. L. Allen, Andrew W. Lenssen, Upendra M. Sainju, TheCan Caesar-TonThat, and R. G. Evans

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Validation of two models for self‐incompatibility in autotetraploid perennial ryegrass using high resolution melting‐based markers, Andrea Arias Aguirre, Bruno Studer, Javier do Canto, Ursula Frei, and Thomas Lubberstedt

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Do cover crops increase or decrease nitrous oxide emissions? A meta-analysis., A. D. Basche, F. E. Miguez, T. C. Kaspar, and M. J. Castellano

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Miscanthus sacchariflorus – biofuel parent or new weed?, Catherine L. Bonin, Emily A. Heaton, and Jessica Barb

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A long-term N fertilizer gradient has little effect on soil organic matter in a high-intensity maize production system., Kimberly H. Brown, Elizabeth M. Bach, Rhae A. Drijber, Kirsten S. Hofmockel, Elizabeth S. Jeske, John E. Sawyer, and Michael J. Castellano

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2014 North Central Regional Conference, C. Lee Burras

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Long-term fate of nitrate fertilizer in agricultural soils is not necessarily related to nitrate leaching from agricultural soils, Michael J. Castellano and Mark B. David

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Evolution of Soil Carbon Storage and Morphometric Properties of Afforested Soils in the U.S. Great Plains, Yuri G. Chendev, Larisa L. Novykh, Thomas J. Sauer, Aleksandr N. Petin, Evgeny A. Zazdravnykh, and C. Lee Burras

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Extensive genetic diversity and low linkage disequilibrium within the COMT locus in maize exotic populations, Yongsheng Chen, Michael Blanco, Qing Ji, Ursula Karoline Frei, and Thomas Lubberstedt

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Temperature and Light Requirements for Miscanthus sinensis Laboratory Germination Test, Erik J. Christian, A. Susana Goggi, and Kenneth J. Moore

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Spatial and Temporal Dynamics of Soil-Surface Carbon Dioxide Emissions in Bioenergy Corn Rotations and Reconstructed Prairies, Aaron L. Daigh, Thomas J. Sauer, Xinhua Xiao, and Robert Horton

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Heterosis in Early Maize Ear Inflorescence Development: A Genome-Wide Transcription Analysis for Two Maize Inbred Lines and Their Hybrid, Haiping Ding, Cheng Qin, Xirong Luo, Lujiang Li, Zhe Chen, Hongjun Liu, Jian Gao, Jaijian Lin, Yaou Shen, Maojun Zhao, Thomas Lubberstedt, Zhiming Zhang, and Guangtang Pan

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Anthocyanin, phenolics and antioxidant activity changes in purple waxy corn as affected by traditional cooking, Bhornchai Harakotr, Bhalang Suriharn, Ratchada Tangwongchai, Marvin P. Scott, and Kamol Lertrat

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Anthocyanins and antioxidant activity in coloured waxy corn at different maturation stages, Bhornchai Harakotr, Bhalang Suriharn, Ratchada Tangwongchai, Marvin P. Scott, and Kamol Lertrat

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Agriculture, Jerry Hatfield, Eugene Takle, Richard Grotjahn, Patrick Holden, R. César Izaurralde, Terry Mader, Elizabeth Marshall, and Diana Liverman

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Switchgrass Response to Nitrogen Fertilizer Across Diverse Environments in the USA: a Regional Feedstock Partnership Report, C. O. Hong, V. N. Owens, D. Bransby, R. Farris, J. Fike, E. Heaton, S. Kim, H. Mayton, R. Mitchell, and D. Viands

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Accuracy and precision of no instrument is guaranteed, Javed` Iqbal, Michael J. Castellano, and Timothy B. Parkin

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Significant Variation for Bio-oil Compounds After Pyrolysis/Gas Chromatography–Mass Spectrometry of Cobs and Stover Among Five Near-Isogenic Brown Midrib Hybrids in Maize, Brandon Jeffrey, Dan Nettleton, Najeeb Kuzhiyil, Marjorie Rover, Robert C. Brown, Kendall Lamkey, and Thomas Lubberstedt

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Standardized research protocols enable transdisciplinary research of climate variation impacts in corn production systems, E. J. Kladivko, M. J. Helmers, L. J. Abendroth, D. Herzmann, R. Lal, M. J. Castellano, D. S. Mueller, J. E. Sawyer, R. P. Anex, R. W. Arritt, B. Basso, J. V. Bonta, L. C. Bowling, R. M. Cruse, N. R. Fausey, J. R. Frankenberger, P. W. Gassman, A. J. Gassmann, C. L. Kling, A. Kravchenko, J. G. Lauer, F. E. Miguez, E. D. Nafziger, N. Nkongolo, M. O'Neal, L. B. Owens, P. R. Owens, P. Scharf, M. J. Shipitalo, J. S. Strock, and M. B. Villamil

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Field Test and Sensitivity Analysis of a Sensible Heat Balance Method to Determine Soil Ice Contents, Yuki Kojima, Joshua L. Heitman, Gerald N. Glerchinger, Tusheng Ren, Robert P. Ewing, and Robert Horton

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Association analysis of single nucleotide polymorphisms in candidate genes with root traits in maize (Zea mays L.) seedlings, Bharath Kumar, Adel H. Abdel-Ghani, Jordan Pace, Jenaro Reyes-Matamors, Frank Hochholdinger, and Thomas Lubberstedt

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Crop Diversification, Tillage, and Management System Influence Spring Wheat Yield and Water Use, Andrew W. Lenssen, U. M. Sainju, J. D. Jabro, W. M. Iversen, B. L. Allen, and R. G. Evans

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Forest succession, soil carbon accumulation, and rapid nitrogen storage in poorly-remineralized soil organic matter, David Bruce Lewis, Michael J. Castellano, and Jason P. Kaye

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Identification of miRNAs and their target genes in developing maize ears by combined small RNA and degradome sequencing, Hongjun Liu, Cheng Qin, Zhe Chen, Tao Zuo, Xuerong Yang, Huangkai Zhou, Meng Xu, Shiliang Cao, Yaou Shen, Haijian Lin, Xiujing He, Yinchao Zhang, Lujiang Li, Haiping Ding, Thomas Lubberstedt, Zhiming Zhang, and Guangtang Pan

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Quality Protein Maize Germplasm Characterized for Amino Acid Profiles and Endosperm Opacity, Adam L. Mahan, Seth C. Murray, Kevin Crosby, and M. Paul Scott

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Midwest vision for sustainable fuel production, Kenneth J. Moore, Stuart J. Birrell, Robert C. Brown, Michael D. Caster, Jill E. Euken, H. Mark Hanna, Dermot J. Hayes, Jason D. Hill, Keri L. Jacobs, Catherine L. Kling, David A. Laird, Robert B. Mitchell, Patrick T. Murphy, D. Raj Raman, Charles V. Schwab, Kevin J. Shinners, Kenneth P. Vogel, and Jeffrey J. Volenic

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Future Prospects for Corn as a Biofuel Crop, Kenneth J. Moore, Douglas L. Karlen, and Kendall R. Lamkey

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Genetic and biochemical differences in populations bred for extremes in maize grain methionine concentration, Mark A. Newell, Karla E. Vogel, Marie Adams, Nevzat Aydin, Anastasia L. Bodnar, Muhammad Ali, Adrienne N. Moran Lauter, and M Paul Scott

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Comparison of Cellulosic Ethanol Yields from Midwestern Maize and Reconstructed Tallgrass Prairie Systems Managed for Bioenergy, V. A. Nichols, F. E. Miguez, M. E. Jarchow, M. Z. Liebman, and B. S. Dien

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Pre-chill with gibberellic acid overcomes seed dormancy of Jerusalem artichoke, Ratchanee Puttha, A. Susana Goggi, Mark L. Gleason, Sanun Jogloy, Thawan Kesmala, Nimitr Vorasoot, Poramate Banterng, and Aran Patanothai

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Candidate Gene Identification for a Lethal Chlorophyll-Deficient Mutant in Soybean, Sam Reed, Taylor Atkinson, Carly Gorecki, Katherine Espinosa, Sarah Przybylski, Alcira Susana Goggi, Reid G. Palmer, and Devinder Sandhu

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Particulate and active soil nitrogen fractions are reduced by sheep grazing in dryland cropping systems, Upendra M. Sainju, Joy L. Barsotti, Andrew W. Lenssen, and Patrick G. Hatfield

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Novel Germplasm and Screening Methods for Early Cold Tolerance in Sorghum, Maria G. Salas-Fernandez, Gregory R. Schoenbaum, and A. Susana Goggi

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An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance, B. J. Schulte, B. J. Tomasek, A. S. Davis, L. Andersson, D. L. Benoit, A. Cirujeda, Jack Dekker, Frank Forcella, J. L. Gonzalez-Andujar, F. Graziani, A. J. Murdoch, P. Neve, I. A. Rasmussen, B. Sera, J. Salonen, F. Tei, K. S. Terresen, and J. M. Urbano

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Climate Forecasts for Corn Producer Decision Making, Eugene S. Takle, Christopher J. Anderson, Jeffrey Andresen, James Angel, Roger Elmore, Benjamin M. Gramig, Patrick Guinan, Steven Hilberg, Doug Kluck, Raymond Massey, Dev Niyogi, Jeanne M. Schneider, Martha D. Shulski, Dennis Patrick Todey, and Melissa Widhalm

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Land use and hydrologic flowpaths interact to affect dissolved organic matter and nitrate dynamics, Ehsan R. Toosi, John P. Schmidt, and Michael J. Castellano

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Soil temperature is positively associated with dissolved organic carbon supply and negatively associated with soil solution nitrate, Ehsan R. Toosi, John P. Schmidt, and Michael J. Castellano

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Time Domain Reflectometry Waveform Analysis with Second-Order Bounded Mean Oscillation, Zhuangji Wang, Yuki Kojima, Songtao Lu, Yan Chen, Robert Horton, and Robert C. Schwartz

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Nitrogen and harvest date affect developmental morphology and biomass yield of warm-season grasses, Naroon Waramit, Kenneth J. Moore, and Emily A. Heaton

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Agronomic Comparison of Anhydrous Ammonia Applied with a High Speed-Low Draft Opener and Conventional Knife Injection in Corn, Krishna P. Woli, Fabián G. Fernández, John E. Sawyer, Joshua D. Stamper, David B. Mengel, Daniel W.. Barker, and Mark H. Hanna

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Sensible Heat Balance Measurements of Soil Water Evaporation beneath a Maize Canopy, X. Xiao, J. L. Heitman, T. J. Sauer, T. Ren, and Robert Horton

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Measurement of Soil Water Content with Dielectric Dispersion Frequency, Jinghui Xu, Sally D. Logsdon, Xiaoyi Ma, Robert Horton, Wenting Han, and Ying Zhao

Submissions from 2013

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Genotypic variation and relationships between seedling and adult plant traits in maize (Zea mays L.) inbred lines grown under contrasting nitrogen levels, Adel H. Abdel-Ghani, Bharath Kumar, Jenaro Reyes-Matamoros, Pedro J. Gonzalez-Portilla, Constantin Jansen, Juan Pablo San Martin, Michael Lee, and Thomas Lubberstedt

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Mapping a New Source of Self-fertility in Perennial Ryegrass (Lolium perenne L.), Andrea Arias Aguirre, Bruno Studer, Javier do Canto, Ursula Frei, and Thomas Lubberstedt

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Genomic, Marker-Assisted, and Pedigree-BLUP Selection Methods for β-Glucan Concentration in Elite Oat, Franco G. Asoro, Mark A. Newell, William D. Beavis, M. Paul Scott, Nicholas A. Tinker, and Jean-Luc Jannink

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Genome-wide Association Study for Beta-glucan Concentration in Elite North American Oat, Franco G. Asoro, Mark A. Newell, M. Paul Scott, William D. Beavis, and Jean-Luc Jannink

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Crop yields and soil organic matter responses to sheep grazing in US northern Great Plains, Joy L. Barsotti, Upendra M. Sainju, Andrew W. Lenssen, Clifford Montagne, and Patrick G. Hatfield

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Net Greenhouse Gas Emissions Affected by Sheep Grazing in Dryland Cropping Systems, Joy L. Barsotti, Upendra M. Sainju, Andrew W. Lenssen, Clifford Montagne, and Patrick G. Hatfield

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Assessing potential of biochar for increasing water-holding capacity of sandy soils, Andres S. Basso, Fernando E. Miguez, David A. Laird, Robert Horton, and Mark E. Westgate

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Resistant Starch: Promise for Improving Human Health, Diane F. Birt, Terri D. Boylston, Suzanne Hendrich, Jay-Lin Jane, James Hollis, Li Li, John F. McClelland, Samuel Moore, Gregory J. Phillips, Matthew James Rowling, Kevin Schalinske, Marvin Paul Scott, and Elizabeth M. Whitley

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Identification of genomic loci associated with crown rust resistance in perennial ryegrass (Lolium perenne L.) divergently selected populations, Gintaras Brazauskas, Yongzhong Xing, Bruno Studer, Britt Schejbel, Ursula Frei, Paul Ragnar Berg, and Thomas Lubberstedt

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Response of soil nitrogen retention to the interactive effects of soil texture, hydrology, and organic matter, Michael J. Castellano, David Bruce Lewis, and Jason P. Kaye

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Soil-Weed Seed Communication Systems, Jack H. Dekker

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Accelerating plant breeding, Gerald N. De La Fuente, Ursula K. Frei, and Thomas Lubberstedt

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Stone-boiling maize with limestone: experimental results and implications for nutrition among SE Utah preceramic groups, Emily C. Ellwood, M. Paul Scott, William D. Lipe, R. G. Matson, and John G. Jones

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Evaluation of Grass and Legume Species as Perennial Ground Covers in Corn Production, E. Scott Flynn, Kenneth J. Moore, Jeremy W. Singer, and Kendall R. Lamkey

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Evaluation of photoacoustic infrared spectroscopy for simultaneous measurement of N2O and CO2 gas concentrations and fluxes at the soil surface, Javed Iqbal, Michael J. Castellano, and Timothy B. Parkin