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- Competition (2)
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- Plant growth regulators (2)
- Poa pratensis (2)
- Rhg4 (2)
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- Soybean cyst nematode (2)
- Stress tolerance (2)
- 15N; Residual N-fertilizer; Fertilizer recovery; Rainfed wheat; Wheat yield response (1)
- ABUTH (1)
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- Ecophysiology (1)
- Genetic mapping (1)
- Genotypic and phenotypic selection (1)
- Glutenin subunits (1)
- High-resolution genetic mapping (1)
- Leaf area index (1)
- Moistened filter paper test (1)
- Phaseolus vulgaris (1)
- Photosynthesis (1)
- Pod injury (1)
- Positional cloning (1)
- Qualitative mapping (1)
- Rhg1 (1)
- Rubisco (1)
- SCN (1)
- Simulation (1)
- Soybean (1)
Articles 1 - 25 of 25
Full-Text Articles in Life Sciences
Predicting Leaf/Stem Ratio And Nutritive Value In Grazed And Nongrazed Big Bluestem, Alexander J. Smart, Walter H. Schacht, Lowell E. Moser
Predicting Leaf/Stem Ratio And Nutritive Value In Grazed And Nongrazed Big Bluestem, Alexander J. Smart, Walter H. Schacht, Lowell E. Moser
Department of Agronomy and Horticulture: Faculty Publications
Recent advancements in describing morphological development of perennial grasses have provided a useful index for identifying dates to harvest hay or graze pasture. The objective of this study was to determine the relationship between big bluestem (Andropogon gerardii Vitman) morphological developmental stage, days from 1 May, and accumulated growing degree days (GDD) and leaf/stem ratio, crude protein (CP), and neutral detergent fiber (NDF) in grazed and nongrazed swards. The grazing experiment was conducted in eastern Nebraska during 1997 and 1998. Six grazing treatments consisting of all combinations of two herbage allowances (22 or 66 kg of herbage dry matter …
‘Forrest’ Resistance To The Soybean Cyst Nematode Is Bigenic: Saturation Mapping Of The Rhg1 And Rhg4 Loci, K. Meksem, P. Pantazopoulos, V. N. Njiti, D. L. Hyten, P. R. Arelli, D. A. Lightfoot
‘Forrest’ Resistance To The Soybean Cyst Nematode Is Bigenic: Saturation Mapping Of The Rhg1 And Rhg4 Loci, K. Meksem, P. Pantazopoulos, V. N. Njiti, D. L. Hyten, P. R. Arelli, D. A. Lightfoot
Department of Agronomy and Horticulture: Faculty Publications
Field resistance to cyst nematode (SCN) race 3 (Heterodera glycines I.) in soybean [Glycine max (L.) Merr.] cv ‘Forrest’ is conditioned by two QTLs: the underlying genes are presumed to include Rhg1 on linkage group G and Rhg4 on linkage group A2. A population of recombinant inbred lines (RILs) and two populations of near-isogenic lines (NILs) derived from a cross of Forrest × Essex were used to map the loci affecting resistance to SCN. Bulked segregant analysis, with 512 AFLP primer combinations and microsatellite markers, produced a high-density genetic map for the intervals carrying Rhg …
Book Review: Grazing Management, 2nd Ed., Lowell E. Moser
Book Review: Grazing Management, 2nd Ed., Lowell E. Moser
Department of Agronomy and Horticulture: Faculty Publications
Grazing management is critical in obtaining optimum production from grasslands and maintaining the grazing resource. Grazing management involves a complex relationship among the herbivores, vegetation, and other biotic and abiotic factors. Proper grazing management of grazing lands has a tremendous importance in agriculture and natural resource conservation because much of the earth’s surface is covered with grazable vegetation. This book is an updated second edition of Grazing Management, which was first published in 1990. This edition is increased in size and coverage compared with the first edition.. A lot of progress in grazing management has been made in the 11 …
Registration Of ‘Cougar’ Wheat, P. Stephen Baenziger, B. Moreno-Sevilla, C. J. Peterson, D. R. Shelton, Roger Wesley Elmore, P. T. Nordquist, R. N. Klein, D. D. Baltensperger, Lenis Alton Nelson, D. V. Mcvey, J. E. Watkins, J. H. Hatchett, Robert A. Graybosch
Registration Of ‘Cougar’ Wheat, P. Stephen Baenziger, B. Moreno-Sevilla, C. J. Peterson, D. R. Shelton, Roger Wesley Elmore, P. T. Nordquist, R. N. Klein, D. D. Baltensperger, Lenis Alton Nelson, D. V. Mcvey, J. E. Watkins, J. H. Hatchett, Robert A. Graybosch
Department of Agronomy and Horticulture: Faculty Publications
Cougar (Reg. no. CV-900, PI 613098) is a hard red winter wheat (Triticum aestivum L.) cultivar developed cooperatively by the Nebraska Agricultural Experiment Station and the USDA-ARS and released in 2000. Cougar was selected from the cross NE85707/'Thunderbird' which was made in 1987. The pedigree of NE85707 is ‘Warrior’*5/‘Agent’//‘Kavkaz’/4/NE63218/‘Kenya 58’/3/‘Newthatch’/2* CTMH//‘Ponca’/*2 ‘Cheyenne’. The pedigree of CTMH is Cheyenne-‘Tenmarq’-‘Mediterranean’-‘Hope’, where the order of the crosses is unknown. The pedigree of NE63218 is believed to be CI 12500//‘Red Chief’/Ponca/3/Cheyenne. The pedigree of CI 12500 is ‘Nebraska No. 60’//Mediterranean/Hope. The F1 to F3 generations were advanced using the bulk breeding method. Cougar …
Controlling Nitrate Leaching In Irrigated Agriculture, Roy F. Spalding, Darrell G. Watts, James S. Schepers, Mark E. Burbach, Mary E. Exner, Robert J. Poreda, Glen E. Martin
Controlling Nitrate Leaching In Irrigated Agriculture, Roy F. Spalding, Darrell G. Watts, James S. Schepers, Mark E. Burbach, Mary E. Exner, Robert J. Poreda, Glen E. Martin
Department of Agronomy and Horticulture: Faculty Publications
The impact of improved irrigation and nutrient practices on ground water quality was assessed at the Nebraska Management System Evaluation Area using ground water quality data collected from 16 depths at 31 strategically located multilevel samplers three times annually from 1991 to 1996. The site was sectioned into four 13.4-ha management fields: (i) a conventional furrow-irrigated corn (Zea mays L.) field; (ii) a surge-irrigated corn field, which received 60% less water and 31% less N fertilizer than the conventional field; (iii) a center pivot-irrigated corn field, which received 66% less water and 37% less N fertilizer than the conventional field; …
Symposium 15. Photosynthesis And Respiration Paper S15-022: Lack Of Genetic Adaptation And Its Effect On Dark Respiration, F. Zavala-Garcia, Jerry Eastin, H. Gamez-Gonzalez
Symposium 15. Photosynthesis And Respiration Paper S15-022: Lack Of Genetic Adaptation And Its Effect On Dark Respiration, F. Zavala-Garcia, Jerry Eastin, H. Gamez-Gonzalez
Department of Agronomy and Horticulture: Faculty Publications
Two sorghum genotypes (Pioneer 8244® and H2183210351) with different degree of adaptation to tropical areas were planted in march in Marin, N.L. Mexico (tropical environment). The objective was to relate dark respiration with the lack of genetic adaptation. The dark respiration measurements were made 85 days after planting, during the grain fill period. The plants in one meter long of the central row were used for the measurements. A plexiglass chamber of 1 m long, 0.8 m width and 1 m tall was seated on top of a wood base to cover all plants in the meter of the row. …
Yield Response And N-Fertilizer Recovery Of Rainfed Wheat Growing In The Mediterranean Region, C. Kirda, James S. Schepers
Yield Response And N-Fertilizer Recovery Of Rainfed Wheat Growing In The Mediterranean Region, C. Kirda, James S. Schepers
Department of Agronomy and Horticulture: Faculty Publications
Yield response and isotopic N-fertilizer recovery of rainfed wheat were assessed as influenced by fertilizer rate and timing. A popular bread wheat cultivar, Seri 82, was planted in a 4-year experiment from 1994/1995 to 1997/1998. Urea fertilizer was applied at rates of 0-240 N ha-1 in two split applications. Fertilizer-N recovery and residual N remaining in the soil after wheat harvest were measured using 15N-labelled fertilizers. The highest wheat grain yield ranged from 4.9 to 6.9 t ha-1 with 240 kg N ha-1 fertilizer. The 4-year results showed that wheat benefited least from the fertilizer applied …
Breeding For End-Use Quality: Reflections On The Nebraska Experience, P. Stephen Baenziger, D. R. Shelton, M. J. Shipman, R. A. Graybosch
Breeding For End-Use Quality: Reflections On The Nebraska Experience, P. Stephen Baenziger, D. R. Shelton, M. J. Shipman, R. A. Graybosch
Department of Agronomy and Horticulture: Faculty Publications
Every cultivar released in Nebraska must have four characteristics: improved agronomic performance relative to existing cultivars, exceptional winterhardiness, resistance to Puccinia graminis (the causal agent of stem rust), and acceptable end-use quality. This paper will discuss our strategy for breeding cultivars with acceptable end-use quality. All experimental lines are derived from crosses with at least one or more parents with acceptable enduse quality. As soon as individual lines are identified (F5) generation, microquality analyses are conducted and approximately 10% are discarded on the basis of poor end-use quality. In the F 6 and later generations, samples are composited …
Use Of Remote-Sensing Imagery To Estimate Corn Grain Yield, J.F. Shanahan, James S. Schepers, Dennis D. Francis, Gary E. Varvel, Wallace Wilhelm, James M. Tringe, Michael R. Schlemmer, David J. Major
Use Of Remote-Sensing Imagery To Estimate Corn Grain Yield, J.F. Shanahan, James S. Schepers, Dennis D. Francis, Gary E. Varvel, Wallace Wilhelm, James M. Tringe, Michael R. Schlemmer, David J. Major
Department of Agronomy and Horticulture: Faculty Publications
Remote sensing—the process of acquiring information about objects from remote platforms such as ground-based booms, aircraft, or satellites—is a potentially important source of data for site-specific crop management, providing both spatial and temporal information. Our objective was to use remotely sensed imagery to compare different vegetation indices as a means of assessing canopy variation and its resultant impact on corn (Zea mays L.) grain yield. Treatments consisted of five N rates and four hybrids, which were grown under irrigation near Shelton, NE on a Hord silt loam in 1997 and 1998. Imagery data with 0.5-m spatial resolution were collected …
Glyphosate-Resistant Soybean Cultivar Yields Compared With Sister Lines, Roger Wesley Elmore, Fred W. Roeth, Lenis Alton Nelson, Charles A. Shapiro, Robert N. Klein, Stevan Z. Knezevic, Alex Martin
Glyphosate-Resistant Soybean Cultivar Yields Compared With Sister Lines, Roger Wesley Elmore, Fred W. Roeth, Lenis Alton Nelson, Charles A. Shapiro, Robert N. Klein, Stevan Z. Knezevic, Alex Martin
Department of Agronomy and Horticulture: Faculty Publications
Herbicide-resistant crops like glyphosate resistant (GR) soybean [Glycine max (L.) Merr.] are gaining acceptance in U.S. cropping systems. Comparisons from cultivar performance trials suggest a yield suppression may exist with GR soybean. Yield suppressions may result from either cultivar genetic differentials, the GR gene/gene insertion process, or glyphosate. Grain yield of GR is probably not affected by glyphosate. Yield suppression due to the GR gene or its insertion process (GR effect) has not been reported. We conducted a field experiment at four Nebraska locations in 2 yr to evaluate the GR effect on soybean yield. Five backcross-derived pairs of …
Glyphosate-Resistant Soybean Cultivar Response To Glyphosate, Roger Wesley Elmore, Fred W. Roeth, Robert N. Klein, Stevan Z. Knezevic, Alex Martin, Lenis Alton Nelson, Charles A. Shapiro
Glyphosate-Resistant Soybean Cultivar Response To Glyphosate, Roger Wesley Elmore, Fred W. Roeth, Robert N. Klein, Stevan Z. Knezevic, Alex Martin, Lenis Alton Nelson, Charles A. Shapiro
Department of Agronomy and Horticulture: Faculty Publications
Glyphosate (N-(phosphonomethyl) glycine)-resistant (GR) soybean [Glycine max (L.) Merr.] technology is gaining acceptance in U.S. cropping systems, yet potential yield suppression from either cultivar genetic differentials, the GR gene/gene insertion process, or glyphosate is a concern. Other work shows that the GR gene/gene insertion process may suppress soybean yield. No one has reported the effects of glyphosate on a diverse group of commercially available GR soybean cultivars. In this study we evaluated one of the potential sources of GR yield suppression—the effect of glyphosate on yield, growth, and development of GR cultivars. Field experiments were conducted at …
Glyphosate-Resistant Soybean Cultivar Yields Compared With Sister Lines, Roger Wesley Elmore, Fred W. Roeth, Lenis Alton Nelson, Charles A. Shapiro, Robert N. Klein, Stevan Z. Knezevic, Alex Martin
Glyphosate-Resistant Soybean Cultivar Yields Compared With Sister Lines, Roger Wesley Elmore, Fred W. Roeth, Lenis Alton Nelson, Charles A. Shapiro, Robert N. Klein, Stevan Z. Knezevic, Alex Martin
Department of Agronomy and Horticulture: Faculty Publications
Herbicide-resistant crops like glyphosate resistant (GR) soybean [Glycine max (L.) Merr.] are gaining acceptance in U.S. cropping systems. Comparisons from cultivar performance trials suggest a yield suppression may exist with GR soybean. Yield suppressions may result from either cultivar genetic differentials, the GR gene/gene insertion process, or glyphosate. Grain yield of GR is probably not affected by glyphosate. Yield suppression due to the GR gene or its insertion process (GR effect) has not been reported. We conducted a field experiment at four Nebraska locations in 2 yr to evaluate the GR effect on soybean yield. Five backcross-derived pairs of …
Predicting Forage Quality In Switchgrass And Big Bluestem, Rob Mitchell, John Fritz, Ken Moore, Lowell E. Moser, Ken Vogel, Daren D. Redfearn, David Wester
Predicting Forage Quality In Switchgrass And Big Bluestem, Rob Mitchell, John Fritz, Ken Moore, Lowell E. Moser, Ken Vogel, Daren D. Redfearn, David Wester
Department of Agronomy and Horticulture: Faculty Publications
Predicting forage quality would help producers scheduled hay harvesting to obtain desired hay quality. Our objective was to determine if growing degree day (GDD), day of the year (DOY), mean stage count (MSC), and mean stage weight (MSW) could be used to predict in vitro digestible dry matter (IVDDM), crude protein (CP), and neutral-detergent fiber (NDF) of ‘Trailblazer’ switchgrass (Panicum virgatum.) and ‘Pawnee’ big bluestem (Andropogon gerardii Vitman) grown in Nebraska and Kansas. This field study was conducted from 1990 to 1993 at Mead, NE on Typic Argiudoll soils and from 1992 to 1993 at Manhattan, KS …
High-Throughput Genotyping For A Polymorphism Linked To Soybean Cyst Nematode Resistance Gene Rhg4 By Using TaqmanTm Probes, Khalid Meksem, Eliza Ruben, David L. Hyten, Michael E. Schmidt, David A. Lightfoot
High-Throughput Genotyping For A Polymorphism Linked To Soybean Cyst Nematode Resistance Gene Rhg4 By Using TaqmanTm Probes, Khalid Meksem, Eliza Ruben, David L. Hyten, Michael E. Schmidt, David A. Lightfoot
Department of Agronomy and Horticulture: Faculty Publications
An individual soybean breeder can generate over one hundred thousand new genotypes each year. The efficiency of selection in these populations could be improved if these genotypes were effectively screened with one DNA marker that identified an important gene, and if laboratory throughput was high and costs were low. Our aim was to develop a rapid genotyping procedure for resistance to the soybean cyst nematode. A high-throughput genotyping method was developed with fluorogenic probes to distinguish between two insertion polymorphisms in alleles of an AFLP marker that is located about 50 kbp from the Rhg4 gene candidate. The assay uses …
Genetic Analysis Of Kafirins And Their Phenotypic Correlations With Feed Quality Traits, In Vitro Digestibility, And Seed Weight In Grain Sorghum, C. Hicks, S. R. Bean, G. L. Lookhart, Jeffrey F. Pedersen, K. D. Kofoid, M. R. Tuinstra
Genetic Analysis Of Kafirins And Their Phenotypic Correlations With Feed Quality Traits, In Vitro Digestibility, And Seed Weight In Grain Sorghum, C. Hicks, S. R. Bean, G. L. Lookhart, Jeffrey F. Pedersen, K. D. Kofoid, M. R. Tuinstra
Department of Agronomy and Horticulture: Faculty Publications
Twenty-three entries of grain sorghum (Sorghum bicolor (L.) Moench), including eight inbred lines (five males and three females) and 15 hybrids, were evaluated to determine the proportion of γ, αII, and β-αI-kafirins and their association with contents of crude protein, fat, and starch; protein digestibility; in vitro dry matter disappearance; and seed weight. The male lines included three normal-seeded lines (TX2737, TX435, and P954063) and two large-seeded lines (Eastin1 and PL-1). Female lines consisted of three common U.S. seed parent lines (Wheatland, Redlan, and SA3042). The lines and their hybrids were grown under dryland conditions at two locations in …
Heat Tolerance Of Kentucky Bluegrass As Affected By Trinexapac-Ethyl, Neil L. Heckman, Garald Horst, Roch E. Gaussoin, Linda J. Young
Heat Tolerance Of Kentucky Bluegrass As Affected By Trinexapac-Ethyl, Neil L. Heckman, Garald Horst, Roch E. Gaussoin, Linda J. Young
Department of Agronomy and Horticulture: Faculty Publications
Heat accumulation during storage of sod may reach lethal temperatures within 4 days, decreasing sod quality. Treatment with trinexapac-ethyl reduces heat accumulation during sod storage. However, heat tolerance of grasses treated with trinexapacethyl has not been documented. Our objectives were to: 1) determine the lethal temperatures for Kentucky bluegrass (Poa pratensis L.); and 2) identify the effect of a single application of trinexapac-ethyl on heat tolerance. Experimental design was a randomized complete block with three replications and a two (trinexapac-ethyl vs. control) × two (cultivars) factorial arrangement of treatments. Ten days after chemical treatment, Kentucky bluegrass sprigs were exposed …
Storage And Handling Characteristics Of Trinexapac-Ethyl Treated Kentucky Bluegrass Sod, Neil L. Heckman, Garald L. Horse, Roch E. Gaussoin, Kevin Frank
Storage And Handling Characteristics Of Trinexapac-Ethyl Treated Kentucky Bluegrass Sod, Neil L. Heckman, Garald L. Horse, Roch E. Gaussoin, Kevin Frank
Department of Agronomy and Horticulture: Faculty Publications
Internal heating during sod storage can lead to plant deterioration and is a limiting factor in sod transportation. Storage practices such as the use of refrigeration and vacuum packaging have increased storage time; however, these are usually not practical or economical. Experiments were conducted to develop a feasible growth regulator management technique, using trinexapac-ethyl, to increase the storage life of Kentucky bluegrass (Poa pratensis L.) sod. Experimental setup for all experiments was a completely randomized design with a 2 (trinexapac-ethyl vs. control) × 3 (storage times) factorial treatment arrangement with 3 replications. Trinexapac-ethyl was applied at 0.23 kg·ha–1 …
Testing The Effects Of Moisture On Seedcoat Color Of Pinto Dry Beans, Muharrem Ergun, Ellen T. Paparozzi, Dermot P. Coyne, Durward Smith, Stephen D. Kachman, David S. Nuland
Testing The Effects Of Moisture On Seedcoat Color Of Pinto Dry Beans, Muharrem Ergun, Ellen T. Paparozzi, Dermot P. Coyne, Durward Smith, Stephen D. Kachman, David S. Nuland
Department of Agronomy and Horticulture: Faculty Publications
Seedcoat color is an important trait, as it affects marketing and consumer acceptance of pinto beans (Phaseolus vulgaris L.). Pinto breeding line NE 94-4 showed seedcoat yellowing in on-farm field trials in Nebraska in 1996 and 1997. Hail, sprinkler irrigation, and fall rainfall appeared to be involved in increasing seedcoat yellowing, based on analysis of field and weather data of on-farm trial sites. The objective of this study was to determine the effect of moisture on seedcoat yellowing of pinto line NE 94-4 (susceptible) and pinto ‘UI-114’ (highly resistant). Two greenhouse experiments were conducted involving misting of bean plants …
Conversion Of Aflp Bands Into High-Throughput Dna Markers, K. Meksem, E. Ruben, D. L. Hyten, K. Triwitayakorn, D. A. Lightfoot
Conversion Of Aflp Bands Into High-Throughput Dna Markers, K. Meksem, E. Ruben, D. L. Hyten, K. Triwitayakorn, D. A. Lightfoot
Department of Agronomy and Horticulture: Faculty Publications
The conversion of AFLP bands into polymorphic sequence-tagged-site (STS) markers is necessary for high-throughput genotype scoring. Technical hurdles that must be overcome arise from genome complexity (particularly sequence duplication), from the low-molecular- weight nature of the AFLP bands and from the location of the polymorphism within the AFLP band. We generated six STS markers from ten AFLP bands (four AFLPs were from co-dominant pairs of bands) in soybean (Glycine max). The markers were all linked to one of two loci, rhg1 on linkage group G and Rhg4 on linkage group A2, that confer resistance to the soybean cyst nematode (Heterodera …
Genomic Regions That Underlie Soybean Seed Isoflavone Content, K. Meksem, V. N. Njiti, W. J. Banz, M. J. Iqbal, My. M. Kassem, David L. Hyten, J. Yuang, T. A. Winters, D. A. Lightfoot
Genomic Regions That Underlie Soybean Seed Isoflavone Content, K. Meksem, V. N. Njiti, W. J. Banz, M. J. Iqbal, My. M. Kassem, David L. Hyten, J. Yuang, T. A. Winters, D. A. Lightfoot
Department of Agronomy and Horticulture: Faculty Publications
Soy products contain isoflavones (genistein, daidzein, and glycitein)that display biological effects when ingested by humans and animals, these effects are species, dose and age dependent. Therefore, the content and quality of isoflavones in soybeans is a key to their biological effect. Our objective was to identify loci that underlie isoflavone content in soybean seeds. The study involved 100 recombinant inbred lines (RIL)fr om the cross of ‘Essex’ by ‘Forrest,’ two cultivars that contrast for isoflavone content. Isoflavone content of seeds fromeach RIL was determined by high performance liquid chromatography (HPLC). The distribution of isoflavone content was continuous and unimodal. The …
A Simple Performance-Based Index For Assessing Multiple Agroecosystem Functions, Mark A. Liebig, Gary E. Varvel, John W. Doran
A Simple Performance-Based Index For Assessing Multiple Agroecosystem Functions, Mark A. Liebig, Gary E. Varvel, John W. Doran
Department of Agronomy and Horticulture: Faculty Publications
Evaluating the impact agricultural practices have on agroecosystem functions is essential to determine the sustainability of management systems. This paper presents an approach to determine the relative sustainability of agricultural practices. A simple ranking procedure using a relative scoring method is proposed to discriminate among treatments based on the status of crop and soil parameters within different agroecosystem functions. Summing scores across agroecosystem functions allows for the identification of agricultural practices that are performing optimally based on functions included in the procedure. An example, using data from a long-term cropping systems experiment in the western Corn Belt, found the indexing …
Crop Potassium Nutrition – Implications For Fertilizer Recommendations, Achim R. Dobermann
Crop Potassium Nutrition – Implications For Fertilizer Recommendations, Achim R. Dobermann
Department of Agronomy and Horticulture: Faculty Publications
During the past 35 years, average corn yields in the North Central Region (NCR) have increased at a rate of 1.7 bu/acre per year, mainly due to the adoption of improved crop management technologies and genetic improvement of corn hybrids. Fertilizer K rates used on corn are typically within a range of 0 to 110 lb K2O/acre, but average usage varies widely among states. Commercial fertilizer use rose sharply in the 1960s and 1970s, but corn yield increases since 1980 were achieved with stagnating fertilizer-N use and declining rates of P and K. Signs of emerging K deficiencies …
Light-Saturated Co2 Assimilation Rates Of Corn And Velvetleaf In Response To Leaf Nitrogen And Development Stage, John L. Lindquist
Light-Saturated Co2 Assimilation Rates Of Corn And Velvetleaf In Response To Leaf Nitrogen And Development Stage, John L. Lindquist
Department of Agronomy and Horticulture: Faculty Publications
Single-leaf CO2 assimilation rate under saturating light (CA) varies as a function of leaf nitrogen content per unit leaf area (NL). Measured CA for many crop species also declines with developmental stage. Because these relationships may have strong implications for crop–weed competition, a field experiment was conducted to quantify corn and velvetleaf CA as influenced by leaf NL and stage of development. Crop and weed CA were measured on the most recent fully expanded leaves of plants grown in four nitrogen (N) application treatments. Both corn and velvetleaf CA increased …
Performance Of Intercom For Predicting Corn– Velvetleaf Interference Across North-Central United States, John L. Lindquist
Performance Of Intercom For Predicting Corn– Velvetleaf Interference Across North-Central United States, John L. Lindquist
Department of Agronomy and Horticulture: Faculty Publications
Cost-effective weed management requires accurate estimates of yield and the potential yield loss resulting from weed infestations. However, crop yield and the effects of weeds are highly variable across years and locations. Ecophysiological models may be useful for predicting the effects of environment and management on crop and weed growth and competitive ability. Ability of the model INTERCOM to predict corn (Zea mays) growth and yield, velvetleaf (Abutilon theophrasti) interference on corn yield loss, and single-year economic threshold velvetleaf density (Te) was evaluated using 13 data sets collected in four states. Predicted and observed …
Seed Physiology, Production & Technology: Germination, Emergence, And Yield Of 20 Plant-Color, Seed-Color Near-Isogenic Lines Of Grain Sorghum, Jeffrey F. Pedersen, J. J. Toy
Seed Physiology, Production & Technology: Germination, Emergence, And Yield Of 20 Plant-Color, Seed-Color Near-Isogenic Lines Of Grain Sorghum, Jeffrey F. Pedersen, J. J. Toy
Department of Agronomy and Horticulture: Faculty Publications
Although there is growing demand for sorghum [Sorghum bicolor (L.) Moench] with white seed and tan plant color, there is limited information on the overall agronomic fitness of sorghum with these characters. A set of experiments was conducted to evaluate the combined effects of plant color and seed color on sorghum germination, emergence, and agronomic performance. Twenty near-isogenic lines with red seed/tan plant (RT), red seed/purple plant (RP), white seed/ tan plant (WT), white seed/purple plant (WP) phenotypes were tested under field and laboratory conditions. Plant color X seed color interactions were not significant. Purple plant color phenotypes had higher …