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Seedbed Effects On Grass Establishment On Abandoned Nebraska Sandhills Cropland, Milton King, Steven S. Waller, Lowell E. Moser, James L. Stubbendieck
Seedbed Effects On Grass Establishment On Abandoned Nebraska Sandhills Cropland, Milton King, Steven S. Waller, Lowell E. Moser, James L. Stubbendieck
Department of Agronomy and Horticulture: Faculty Publications
Perennial grass establishment on abandoned cropland in the Nebraska Sandhills difficult due to low soil fertility, organic matter, and water holding capacity and high potential erodibility. Establishment is further complicated by unpredictable precipitation and weed competition. Two warm-season grasses: sand bluestem [Andropogon gerardii var. paucipilus (Nash) Fern.] and switchgrass (Panicam virgatum L.); and 2 cool-season grasses: smooth brome (Bromus inermis Leyss.) and intermediate wheat-grass [Thinopyrum intermedium (Host) Barkw. & D.R. Dewey subsp. were evaluated with spring-seeded field trials. Seedbed preparation [untilled, disced, and dead oat (Avena sativa L.) cover (DOC)] effect on seeded grass and …
Atrazine And Fertilizer Effects On Sandhills Sub- Irrigated Meadow, John J. Brejda, Lowell E. Moser, Steven S. Waller, Stephen R. Lowry, Patrick E. Reece, James T. Nichols
Atrazine And Fertilizer Effects On Sandhills Sub- Irrigated Meadow, John J. Brejda, Lowell E. Moser, Steven S. Waller, Stephen R. Lowry, Patrick E. Reece, James T. Nichols
Department of Agronomy and Horticulture: Faculty Publications
Many Nebraska Sandhills sub irrigated meadows have shifted to predominantly cool-season grasses. Meadows are often cut in July when forage quality of cool-season is lower than that of warm season species. The objective of this research was to evaluate a one-time application of atrazine [6-chloro-N-ethyl-N’-(l-methylethyl)- 1,3,5-triazine-2,4-diamine] in restoring dominance of warm-season grasses and to determine lf nitrogen (N) with and without phosphorus (P) would enhance or prolong the atrazine effect on specks composition, yield, crude protein, and in vitro dry matter digestibility (IVDMD). Atrazine WM applied once at 0,2.2, and 3.3 kg/ha In spring or fall 1983 and 1984 to …
Bradyrhizobium Japonicum Survival In And Soybean Inoculation With Fluid Gels, Michael D. Jawson, Alan J. Franzluebbers, Robert K. Berg
Bradyrhizobium Japonicum Survival In And Soybean Inoculation With Fluid Gels, Michael D. Jawson, Alan J. Franzluebbers, Robert K. Berg
Department of Agronomy and Horticulture: Faculty Publications
The utilization of gels, which are used for fluid drilling of seeds, as carriers of Bradyrhizobium japonicum for soybean (Glycine max (L.) Merr.) inoculation was studied. Gels of various chemical composition (magnesium silicate, potassium acrylate-acrylamide, grafted starch, and hydroxyethyl cellulose) were used, although the hydroxyethyl cellulose gels were more extensively investigated. Gel inocula were prepared by mixing gel powder with liquid cultures of B. japonicum (2% [wt/vol]). The population of B. japonicum USDA 110 did not change in each gel type during 8 days of incubation at 28°C. These fluid gels were prepared with late-exponential-growth-phase cells that were washed …
Genetic Variability For Seedling Atrazine Tolerance In Indiangrass, J. G. Kube, Kenneth P. Vogel, Lowell E. Moser
Genetic Variability For Seedling Atrazine Tolerance In Indiangrass, J. G. Kube, Kenneth P. Vogel, Lowell E. Moser
Department of Agronomy and Horticulture: Faculty Publications
Indiangrass [Sorghustrum nutans (L.) Nash] lacks sufficient seedling atrazine [6-chloro-N-ethyl-N’-(l-methylethyl)-1,3,5-triazine-2,4-diamine] tolerance to permit the use of atrazine as a pre-emergence herbicide. The principle objective of this study was to estimate the genetic variability for seedling atrazine tolerance in two indiangrass populations, 'Nebraska 54' and 'Holt', using seed harvested from replicated clones. Seedling survival in soil containing 3 mg kg-1 atrazine was determined in the greenhouse. There was significant genetic variability among half-sib families of both populations for seedling atrazine tolerance. Heritability estimates were greater than 0.50. There was also significant genetic variability among the …
Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand
Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand
Department of Agronomy and Horticulture: Faculty Publications
Farming Systems Research and Extension (FSR/E) has strongly influenced the direction of agricultural development over the past two decades. Involving farmers, change agents and researchers, this participatory approach to technological improvement has evolved as an efficient means to develop individual components and more integrated systems that are uniquely suited to specific biophysical and socioeconomic conditions. Farmers with similar conditions and for whom specific recommendations are appropriate are grouped, in FSR/E, into identifiable Recommendation Domains. The technologies recommended conform with the biophysical and socioeconomic constraints that create environments within the domains, based on the philosophy that new technologies must conform with …
Teaching Weed Identification At Twenty U.S. Universities, John L. Lindquist, Peter Fay, James Nelson
Teaching Weed Identification At Twenty U.S. Universities, John L. Lindquist, Peter Fay, James Nelson
Department of Agronomy and Horticulture: Faculty Publications
The methods used to teach weed identification at 20 U.S. universities were obtained for comparison through a telephone survey in December, 1986, and January, 1987. Weed identification is taught as a portion (30%) of the laboratory section in introductory weed science courses. Only five have a separate weed identification course. Field trips frequently are used to teach weed identification. Students must learn from 50 to 125 weed species with some seedling identification. Pressed plant collections of approximately 50 weed species normally are required. Most instructors strongly suggest using live plants and repetition for long-term learning.
Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi
Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi
Department of Agronomy and Horticulture: Faculty Publications
A new and distinct variety of rose plant of the hybrid tea rose class, which was originated as a sport of the rose Gabriella; characterized by its bright orange red, well-formed hybrid tea type blooms with dark velvet overtones on the outer edges of the open flower; disease resistant with everblooming habit and outstanding pot forcing characteristics.