bluuebunny/crossref_metadata_2025 huggingface dataset:
Biological Control of Northern Jointvetch (Aeschynomene virginica) in Rice (Oryza sativa) and Soybeans (Glycine max) — a Researcher's View
Authors: Smith Roy J.
Published: May 2019

Weed control strategies for rice (Oryza sativaL.) and soybean [Glycine max(L.) Merr.] emphasize integration of cultural and chemical practices (16, 30, 31). Numerous herbicides are registered and used as preplant, preemergence, or post-emergence applications for control of weeds in rice and soybean (3, 16, 25). Although these herbicide treatments control most of the problem weeds in rice and soybean, most fail to control northern jointvetch [Aeschynomene virginica(L.) B.S.P. # AESVI] in either crop. The two most effective herbicides, 2,4,5-T [2-(2,4,5-trichlorophenoxy) acetic acid] and silvex [2-(2,4,5-trichlorophenoxy) propanoic acid], for control of northern jointvetch in rice have been under the U.S. Environmental Protection Agency's (EPA) Rebuttal Presumption Against Registration (RPAR) process which may ultimately cancel the use of both herbicides in rice (50). New, effective control strategies are needed for control of northern jointvetch in rice and soybean.
Microcomputer Measurements of Pathogen Injury to Weeds
Authors: Lindow Steven E. , Andersen Gary L.
Published: May 2019

The impact of chemical or biological herbicides in weed control may or may not be absolute. The traditional goal in chemical herbicide evaluation has been the identification of materials and application rates resulting in absolute (100%) kill of susceptible weeds. However, many insects or plant pathogens affecting weeds do not kill their weed hosts but decrease their growth and or reproduction in the field. Obligate plant pathogens dependent upon their weed hosts for their own survival derive no evolutionary advantage from killing their weed hosts and seldom do so under natural conditions. Under field conditions where weeds are subjected to stresses imposed by competition with crop and/or other wild plants, these biological agents can decrease the impact of a weed on crop or wildland productivity to tolerable economic levels. The recognition that the impact of chemical and/or biological herbicides on weeds need not be absolute to be effective has been accompanied by a search for an accurate, efficient, and economical method to measure quantitative changes in weed growth or health. While much of this report will concentrate on measuring impact of plant pathogens on weeds or other plants, all comments and techniques will apply also to other stresses such as herbicide injury.
Seed-Soil Microsite Characteristics in Relation to Weed Seed Germination
Authors: Pareja Mario R. , Staniforth David W.
Published: May 2019

Growth chamber and laboratory experiments evaluated the effects of seed-soil microsite characteristics on seed germination. When corn (Zea maysL. ‘Pioneer 3541’), soybean [Glycine max(L.) Merr. ‘Corsoy 79’], velvetleaf (Abutilon theophrastiMedic. ♯ ABUTH), and giant foxtail (Setaria faberiHerrm. ♯ SETFA) were seeded among soil aggregates 2.50 to 1.25 cm in diameter in the growth chamber, there was decreased seedling emergence with decreasing frequency of irrigation. These same species seeded inside artificial soil aggregates showed increased seedling emergence with decreasing frequency of irrigation. The germination of corn and soybean seed inside 0.4-g, fully moist soil aggregates incubated in the laboratory under high relative humidity conditions was significantly decreased relative to seed incubated in the absence of soil. Velvetleaf and giant foxtail germination was significantly reduced by 0.1-g soil aggregates. Rice (Oryza sativaL.) had 68% emergence from 1.0-g, fully moist soil aggregates, whereas larger seeded corn and soybean had only 20 and 10% emergence, respectively. Germination inhibition of giant foxtail seed by fully moist soil was partially reversed by incubating seed-containing aggregates in an atmosphere of 75% oxygen.
Control of Velvetleaf (Abutilon theophrasti) and Common Cocklebur (Xanthium pensylvanicum) in Soybeans (Glycine max) with Sequential Applications of Mefluidide and Acifluorfen
Authors: Glenn Scott , Hook Barbara J. , Peregoy Robert S. , Wiepke Thomas
Published: May 2019

Single and sequential applications of mefluidide {N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl] amino] phenyl] acetamide} and acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} were evaluated in the field for velvetleaf (Abutilon theophrastiMedic. ♯ ABUTH) and common cocklebur (Xanthium pensylvanicumWallr. ♯ XANPE) control in soybeans [Glycine max(L.) Merr. ‘Williams’]. Acifluorfen was applied at 0.4 or 0.6 kg ai/ha alone or 3, 5, or 7 days following application of 0.1 or 0.3 kg ai/ha mefluidide. Acifluorfen applied alone provided acceptable control of velvetleaf and common cocklebur in the two- and three-leaf stage of growth, but acifluorfen was not as effective when applied to weeds with five to eight true leaves. Sequential applications of mefluidide and acifluorfen often increased velvetleaf and common cocklebur control, compared to either herbicide applied alone.
Effects of Temperature and Photoperiod on Common Crupina (Crupina vulgaris)
Authors: Patterson David T. , Mortensen David A.
Published: May 2019

Achene germination of common crupina (Crupina vulgarisCass. ♯ CJNVU) was 86% or greater at day/night temperatures ranging from 15/4 to 29/25 C. Germination was greatly reduced at a day temperature of 36 C, regardless of the night temperature. The time required for maximum germination (9 to 19 days) increased with decreasing night temperature. Maximum leaf area, rosette diameter, and dry-matter accumulation during vegetative growth occurred at 22/18 to 29/25 C, 22/18 C, and 22/18 C, respectively. The plants attained 50% or more of maximum dry-matter accumulation at day/night temperatures ranging from as low as 22/4 and 15/11 C to as high as 36/25 C. Net assimilation rate was relatively insensitive to growth temperature. Rosettes of common crupina grown at 22/11 or 29/18 C exhibited almost complete photosynthetic and respiratory temperature acclimation. Increasing the photoperiod from 10 to 12, 14, or 16 h accelerated flowering. Maximum achene production occurred in the 16-h photoperiod, but viable achenes were produced in all photoperiods. Temperature during vegetative growth influenced subsequent responses to photoperiod. Plants grown for 83 days in a 14-h photoperiod at 15/4 or 22/11 C and transferred to 26/20 C flowered and produced seed in photoperiods of 8 or 16 h. Plants grown at 29/18 or 36/25 C subsequently flowered only in the 16-h photoperiod at 26/20 C. Common crupina has a wide tolerance of variations in temperature and photoperiod. Its range in the United States can be expected to continue to increase.
Germination and Viability of Common Crupina (Crupina vulgaris) Achenes Buried in the Field
Authors: Thill Donald C. , Zamora David L. , Kambitsch Donald L.
Published: May 2019

The influence of depth (0 to 20 cm) and duration (1 to 31 months) of burial on the deterioration, germination, and viability of common crupina (Crupina vulgarisCass. ♯ CJNVU) was investigated in the field. Germination and decay of achenes prior to removal from the field were greater at 0- to 10- (7%) and 0- to 15- (21%) cm burial depths than at the 20-cm burial depth for 1980 and 1981 seedlots, respectively. After 25 months of burial, 41 and 26% of the achenes had not deteriorated for the 1980 and 1981 seedlots, respectively. Germination was greatest for nondeteriorated achenes recovered from 3- and 20-cm (63%) and least for the 10-cm burial depth (44%). Common crupina achenes recovered from the field over 25 months of burial exhibited a pronounced periodicity of germination, which was related to induced winter dormancy. The viability of achenes decreased linearly from 90 to near 0% over 31 months of burial.
Susceptibility of Five Species of theSolanum nigrumComplex to Herbicides
Authors: Quakenbush Laura S. , Andersen Robert N.
Published: May 2019

Eight accessions of weedy nightshades representing five species were evaluated for response to four herbicides applied preemergence in growth chamber studies and four herbicides applied postemergence in greenhouse studies. Species differed in susceptibility to all herbicides evaluated. The largest differences were found with postemergence applications of chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide}; hairy nightshade (Solanum sarrachoidesSendt. ♯ SOLSA) was relatively susceptible, but eastern black nightshade (S. ptycanthumDun.) was very tolerant.S. ptycanthum, however, was one of the more susceptible species. It was always more susceptible than black nightshade (S. nigrumL. ♯ SOLNI) to all other herbicides evaluated.
Chemical and Physical Effects of the Accumulation of Glyphosate in Common Milkweed (Asclepias syriaca) Root Buds
Authors: Waldecker Mark A. , Wyse Donald L.
Published: May 2019

Distribution of14C-glyphosate [N-(phosphonomethyl)glycine] in chemically treated and physically manipulated common milkweed [Asclepias syriaca(L.) ♯ ASCSY] was studied in greenhouse and growth chamber experiments. Pretreatment with glyphosate at 0.6 and 1.1 kg ae/ha 3 days prior to14C-glyphosate application to leaves reduced the concentration of14C recovered from shoots and leaves above the14C-glyphosate-treated leaves but had no influence on the concentration of14C in proximal root buds. Partial removal of the shoot and root prior to the application of14C-glyphosate increased bud respiration and the concentration of14C in the proximal root buds. Proximal root buds treated with 1 mM of 6-benzyl-aminopurine (BAP) for 6 days (3 days prior to application of14C-glyphosate) contained seven times more14C/mg than root buds of BAP-untreated plants, suggesting that dormant buds could be chemically stimulated to accumulate higher concentrations of glyphosate. BAP-treated buds were killed by foliar applications of glyphosate at 1.1 kg/ha, indicating that proximal root buds can be stimulated to acquire lethal concentrations of glyphosate.
Rangeland Vegetation Response Following Control of Brownspine Pricklypear (Opuntia phaecantha) with Herbicides
Authors: Price David L. , Heitschmidt Rodney K. , Dowhower Steven A. , Frasure James R.
Published: May 2019

Brownspine pricklypear (Opuntia phaecantha Engelm. & Bigel.) was effectively controlled within 2 yr following application of a 1:1 mixture of 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] and picloram (4-amino-3,5,6-trichloropicolinic acid) at a rate of 0.6 kg ae/ha. Brownspine pricklypear canopy cover and dry weight declined from approximately 23% and 3800 kg/ha to 8% and 1600 kg/ha, respectively. No significant difference in total herbaceous forage dry weight was found between plants growing inside brownspine pricklypear canopy areas and plants growing outside the canopy areas. Differences between areas in species composition were significant in that cool-season grasses dominated the canopy area of the brownspine pricklypear colonies while warm-season grasses dominated the area outside the canopy. Control of brownspine pricklypear will enhance livestock carrying capacity of rangeland in the Rolling Plains of Texas by increasing forage availability but not forage production.
Associations between Discrete Genetic Loci and Genetic Variability for Herbicide Reaction in Plant Populations
Authors: Price Steven C. , Allard Robert W. , Hill James E. , Naylor James
Published: May 2019

Genetic variability for loci governing enzyme/morphological variants and for herbicide response was determined in 10 populations of the slender wild oat (Avena barbataPott. ex Link ♯ AVEBA), six populations of wild oat (Avena fatuaL. ♯ AVEFA), and three populations of godetia (Clarkia williamsoniiLewis & Lewis). The enzyme loci were identified by starch gel electrophoresis and included peroxidase, 6-phosphogluconate dehydrogenase, esterase, and leucine aminopeptidase for the slender wild oat; peroxidase, esterase, leucine aminopeptidase, and malate dehydrogenase for the wild oat; and esterase, phosphoglucoisomerase, leucine aminopeptidase, acid phosphatase, and glutamate oxaloacetate transaminase for godetia. Morphological loci included lemma and leaf sheath hairiness for the oats. For both the enzymatic and morphological loci, levels of genetic variation for each population were quantified by a polymorphic index. The herbicide barban (4-chloro-2-butynyl 3-chlorophenylcarbamate) was used on the wild oats; bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) was used on godetia. Genetic variation for herbicide response was based on genetic variances calculated from phytotoxicity scores. Populations were ranked from highest to lowest for the polymorphic indices and the genetic variances. Concordance between the rankings was tested by rank correlation. Statistically significant relationships were found between the enzyme/morphological characters and herbicide response in the slender wild oat and the wild oat. For some species, the level of genetic variation for response to herbicides appears to be associated with genetic variation for enzymatic and morphological loci.
A Nursery Study of Large-Flowered Taxa ofCarduus
Authors: McCarty M. K.
Published: May 2019

Populations of large-flowered taxa ofCarduusfrom many locations in the United States and Canada were grown in a common nursery from 1975 to 1983 at Lincoln, NE. Dates of first bloom and associated degree-day accumulation data exhibited some consistent relationships. Four species appeared to be represented in the collection. These includedCarduus thoermeriWein.,C. macrocephalusDesf., and musk thistle (C. nutansL. ♯ CRUNU). A collection from British Columbia should be accorded species status but apparently has not been named in the literature. Interbreeding has taken place in the nursery and these combinations are intermediate betweenC. thoermeriandC. macrocephalusand betweenC. thoermeriand the British Columbia material. Some morphological characteristics supported these separations.
Red Rice (Oryza sativa) Control in Drill-Seeded Rice (O. sativa)
Authors: Diarra Amadou , Smith Roy J. , Talbert Ronald E.
Published: May 2019

Field experiments were conducted to investigate methods of controlling red rice (Oryza sativaL. ♯ ORYSA) in drill-seeded rice (O. sativa). Treatments included the rice cultivar ‘Mars', coated with calcium peroxide (CaO2) at 40% (w/w) and a crop protectant, R-33865 (O,O-diethyl-O-phenyl phosphorothioate) at 0.5 and 1% (v/w). Molinate (S-ethyl hexahydro-1H-azepine-1-carbothioate) at 6.7 kg ai/ha was applied preplant incorporated (ppi). The land was flooded (2.5 to 5 cm deep) after seeding with rice (100 kg/ha, 2.5 cm deep), and the water was maintained throughout the growing season. CaO2, with or without molinate, increased rice grain yield 50% and increased rice culm density fivefold above untreated rice. Molinate applied ppi controlled 96% of the red rice. Rice seed coated with only CaO2or with CaO2plus R-33865 at 0.5%, each combined with ppi molinate, produced 5690 and 6030 kg/ha of grain, respectively. These high yields were associated with red rice control by molinate and good stands of rice provided by O2supplied by CaO2. R-33865 applied to rice seed at 1% (v/w) injured rice by reducing rice culm densities 41%, compared with rice without protectant.
Dicamba Absorption and Translocation as Influenced by Formulation and Surfactant
Authors: Petersen Phil J. , Haderlie Lloyd C. , Hoefer Raymond H. , McAllister Ray S.
Published: May 2019

Absorption and translocation of14C-dicamba (3,6-dichloro-o-anisic acid) in seven salt formulations were determined 60 h after application to leaves of soybean [Glycine max(L.) Merr. ‘Williams’] grown in nutrient solution. The dimethylamine (DMA) formulation was consistently absorbed and retained in the plant in amounts equal to or greater (46% of recovered14C) than other formulations (which averaged 19% of recovered14C) when applied without surfactant. Absorption and subsequent retention of the DMA formulation in the plant was least affected of all formulations by the addition of a surfactant. With a surfactant, absorption of the DMA, monoethanolamine (MEA), and inorganic salt formulations was similar (>75% of recovered14C). Addition of seven surfactants to the K-salt of dicamba increased both the amount of14C absorbed by 35 to 56% and the amount recovered in the plant. All surfactants except one enhanced absorption of the K-salt of dicamba to a similar degree. Dicamba exhibited predominantly symplastic translocation with the majority of14C being recovered in the new second trifoliolate leaves and nutrient solution. As much as 66% of the radioactivity absorbed through the leaves was exuded by roots into the nutrient solution 60 h after leaf treatment.
Plant Succession Following Control of Western Juniper (Juniperus occidentalis) with Picloram
Authors: Evans Raymond A. , Young James A.
Published: May 2019

A 7-yr study was conducted to investigate successional dynamics of herbaceous vegetation after control of western juniper (Juniperus occidentalisHook.) trees with picloram (4-amino-3,5,6-trichloropicolinic acid) pellets. Downy brome (Bromus tectorumL. # BROTE) rapidly dominated areas under dead tree canopies with an accompanying yield increase from almost none to about 1400 kg/ha within 4 yr after treatment. In the interstitial zone between tree canopies, a dramatic shift in herbaceous species occurred with tree control. Annual broadleaf species decreased, downy brome increased, and medusahead [Taeniatherum asperum(Sim.) Nevski # ELYCM] gradually became dominant. Total yield of herbaceous vegetation in the interstitial zone increased dramatically after picloram treatment, especially where few shrubs occurred. Available soil moisture, litter accumulation and decay after picloram treatment, and N in the surface layer of the soil affected responses of herbaceous vegetation, especially under dead tree canopies. Responses of annual weedy species to western juniper control emphasize the need for comprehensive manipulation of all components of the vegetation when range improvement is attempted.
Germination of Mayweed (Anthemis cotula) Achenes and Seed
Authors: Gealy David R. , Young Frank L. , Morrow Larry A.
Published: May 2019

Mayweed (Anthemis cotula L. # ANTCO) achenes and seed were germinated in the laboratory at constant temperatures ranging from 5 to 30 C. Maximum percent germination occurred at 20 C for both achenes and seed. Under all conditions tested, achene germination was less than seed germination. Both acid scarification for 15 min and soaking in 14 mM gibberellic acid (GA3) more than doubled achene germination. Pericarp leachate inhibited achene and seed germination only at high concentrations, indicating that inhibitors in the pericarp are not a primary cause of low germination in achenes. Optimum germination of achenes and seed occurred at pH 4.5 and over a range from pH 3 to pH 6. Achene germination was inhibited to a greater degree by moisture stress than was seed germination. It appears that structural integrity of the pericarp is the predominant factor affecting mayweed germination.
Integration of a Microbial Herbicide into Weed and Pest Control Programs in Rice (Oryza sativa)
Authors: Klerk Richard A. , Smith Roy J. , TeBeest David O.
Published: May 2019

Field research was conducted in Arkansas to determine the effect of selected rice pesticides on the microbial herbicideColletotrichum gloeosporioides(Penz.) Sacc. f. sp.aeschynomene(henceforth designated C.g.a.) and to integrate C.g.a. into control programs for northern jointvetch [Aeschynomene virginica(L.) B.S.P. # AESVI] in rice (Oryza sativaL.). Water suspensions of dry-formulated spores of C.g.a. at 1.9 × 1011spores/ha were applied midseason in sequence with normal use rates of other pesticides. Carbofuran (2,3-dihydro-2,2-dimethyl-7-benzofuranyl methyl-carbamate) at 0.56 kg ai/ha, propanil (3’4’-dichloropropio-anilide) at 2.2 kg ai/ha, acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} at 0.14 kg ai/ha, or fentin hydroxide (triphenyltin hydroxide) at 0.56 kg ai/ha did not reduce disease development of C.g.a. on northern jointvetch. Sequential applications of benomyl [methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate] at 0.56 kg ai/ha reduced activity of the fungus on northern jointvetch when fungicide applications began 1 week after C.g.a. application but had no effect on mycoherbicide activity when applications began 2 weeks after C.g.a.
Between Solidarity and Self-Interest: The Elderly and Support for Public Education Revisited
Authors: BUSEMEYER MARIUS R. , LOBER DOMINIK
Published: May 2019

Proceeding population aging might fuel generational conflicts about the distribution of welfare state resources in the future, but the existing evidence on the extent of generational cleavages in attitudes towards the welfare state is mixed. We argue that these mixed findings are partially related to an underestimation of trade-offs on the level of individual preferences. Using novel data from a survey experiment conducted in eight Western European countries, we show that age-related self-interest is an important determinant of social policy preferences. When elderly respondents are confronted with hypothetical cutbacks in pensions, they are much less likely to support additional education spending. However, we also find evidence for a mediating effect of social trust: high-trusting elderly individuals are more likely to support education spending – contrary to their narrow self-interest – than low-trusting elderly.
CONSOLIDAMENTO DEMOCRATICO: ALCUNE IPOTESI ESPLICATIVE
Authors: Morlino Leonardo
Published: May 2019

Introduzione

Il consolidamento democratico è un processo di congelamento nei suoi caratteri essenziali, e di adattamento in quelli secondari, delle strutture e norme del regime democratico; è, inoltre, un processo di progressivo ampliamento della legittimazione del regime. La prima dimensione riguarda il periodo successivo all'instaurazione, e si può considerare conclusa — in caso di consolidamento — dopo circa dieci-dodici anni dall'inizio dell'instaurazione. La seconda non è sempre necessaria in quanto la legittimazione può essere, più o meno completamente, raggiunta già durante la instaurazione democratica. Se vi è, come in effetti in diversi casi accade, si prolunga negli anni, è molto lenta e riguarda in special modo le strutture di intermediazione, quali partiti, sindacati o altre organizzazioni.
The sublittoral benthic fauna of the estuary and Firth of Forth, Scotland
Authors: Elliott M. , Kingston Paul F.
Published: May 2019

Synopsis

The structure of the sublittoral benthic macro-invertebrate populations of the Forth estuary and firth, Scotland, is described, giving the species richness, abundance and biomass for the area from the freshwater tidal limit to the North Sea boundary. Eight faunal associations have been defined, which include classical Petersen communities in the marine area and transition associations within the estuary. The spatial distributions of the associations are predominantly the result of the physical environment, but superimposed on the effects of salinity, sediment type and bathymetry are the effects of urbanisation, industrialisation, dredging and spoil disposal and thermal discharges. The benthos of the major part of the firth has been little affected, although that of the peripheral and estuarine areas does show anthropogenic effects.

The water column-benthos and fisheries-benthos interactions are also discussed. Elevated levels of nutrients in the water column may be the cause of enriched benthic populations in the firth and an assessment of the fish-benthos coupling indicates an estuarine functioning similar to other northwestern European areas.
Variation of structural parameters in dimethylammonium manganese formate [(CH3)2NH2]Mn(HCOO)3 by substitution of transition metals (M = Zn, Co and Ni): by powder XRD method
Authors: Sornadurai D. , Sarguna R. M. , Sridharan V.
Published: May 2019

Variation of structural parameters of dimethylammonium manganese formate [(CH3)2NH2]Mn[(HCOO)3] upon substitution by the transition elements Zn, Co, and Ni is studied by powder X-ray diffraction (PXRD) technique. These metal–organic framework (MOF) crystals were grown by solvothermal method. The PXRD patterns of all MOFs exhibited rhombohedral structure. PXRD patterns of MOFs were analyzed using Rietveld refinement method. While the parent Mn-MOF and Mn0.9Zn0.1MOF are found to have similar structural parameters, Co and Ni substituted Mn-MOFs have smaller structural parameters than that of parent Mn-MOF. The reason for this variation in the lattice parameters is explained based on the Shannon ionic radii.
A cropping systems approach to salinity management in California
Authors: Cassman Kenneth G. , Rains D. William
Published: May 2019

In irrigated cropland of the semi-arid and arid regions of California, the lack of drainage outflow requires reassessment of crop rotation patterns. As regulatory actions place limits on drainage water quality and quantity, growers will be forced to manage water more efficiently and rely more heavily on salt-tolerant crops. Improved water use efficiency depends on integrated cropping systems in which cultural practices interact to reduce leaching requirements while maintaining productivity, profitability, and the environment. The success of this approach will require a better understanding of the physiological basis of plant salt tolerance and the evolution of soil properties as influenced by crop rotation, tillage, crop residue and soil fertility management. An increased commitment to evaluate such interactions in long-term field studies is needed.
Dairy farm feeding and income effects of using Voisin grazing management of permanent pastures
Authors: Murphy William M. , Rice John R. , Dugdale David T.
Published: May 2019

Permanent pastures produce far below their potential, as they are usually managed in the northcentral and northeastern United States. Dairy farmers in these regions generally feed their cattle year-round from stored forage and purchased concentrates, and use permanent pastures as mere holding or exercise areas, grazing them continuously. This practice involves high operating costs that, combined with lower milk prices, have resulted in greatly reduced profit margins. Farming practices that return more net income are needed. The Voisin system of rotational grazing management, which applies intensive management to forage crops on pastureland, is widely used on dairy and sheep farms in New Zealand. Farmers using the Voisin system there have low operating costs and obtain high yields of excellent quality forage over long grazing periods; increased net income results Between 1 May and 1 October 1984, 497 forage samples were taken and analyzed from permanent pastures grazed according to the Voisin management system on six Vermont dairy farms. This was done to provide farmers with current estimates of forage feeding value so that they could balance their cows' rations accordingly throughout the season, and determine if they could improve the profitability of their farms by using Voisin grazing management. Average grazingseason analyses (dry weight) were: 22.5% dry matter, 22.4% crude protein, 20.8% available protein, 28.4% acid detergent fiber, 1.18% calcium, .48% phosphorus, 1.60% potassium, .22% magnesium, and 1.58 Mcal/kg net energy lactation. Average dry forage yield was 8.9 metric tons/ha. Dry matter intake was adequate for milk production up to 36 kg/cow/day. Forage protein and energy contents were sufficient for at least 25 and 18 kg milk/day, respectively. On three farms where economic factors were calculated, net profits per cow averaged $67 more during the 5-month period from using Voisin grazing management, compared to continuous grazing of the same pastureland in the year before Voisin management was used. This profit resulted mainly from feed savings and a more favorable milk:concentrate ratio of 4.1:1 obtained with Voisin management, compared to 2.7:1 with continuous grazing and more feeding of stored or machine-harvested forage. Voisin-managed pastures can produce high yields of excellent-quality forage that can be incorporated into dairy feeding programs, thereby reducing feed costs and increasing profitability of the farming operations.
Some Issues in Continuous- and Discrete-Response Contingent Valuation Studies
Authors: Hanemann W. Michael
Published: May 2019

I want to begin with a caveat. I have no training in psychology, and my interest in the field is that of an amateur. Thus, the confidence with which I shall make statements about psychological facts is in inverse proportion to my expertise. My point of departure is the assumption that the most serious problem with contingent valuation (CV) methodology is hypothetical bias. Apart from introspection, the evidence for this assumption comes from two classic studies conducted by Richard Bishop and his colleagues at the University of Wisconsin. The first study by Bishop and Heberlein (1979) involved a survey of two random samples of individuals who had obtained permits to hunt ducks in the Horizon Zone of East Central Wisconsin. One sample group was asked the hypothetical question whether they would be willing to sell their permit for a specified sum of money (this sum differed among individuals). The other sample group was given a real opportunity to sell their permit for a specified sum of money; of 237 hunters surveyed, 105 actually sold their permits.
Demographic Versus Media Advertising Effects on Milk Demand: The Case of the New York City Market
Authors: Kinnucan Henry
Published: May 2019

An advertising-sales response model is extended to include the effects of demographic factors (age and race) as additional determinants of milk demand. Previous research indicates that the age structure of a population and its racial composition are primary factors influencing fluid milk sales. Failure to incorporate these factors in the milk demand model results in a 30 percent downward biased estimate of the advertising effect. Consequently, the economic effectiveness of milk advertising is understated when the effects of demographic variables are ignored. Changes in demographic factors (growing nonwhite population and shrinking teenage market) appear to explain the relatively flat trend in per capita milk sales in the New York City market over the period 1971–80—a period in which dairy producers spent $12 million on generic advertising of milk. Net returns to Federal Order 2 dairy farmers from generic advertising of fluid milk is estimated to average $6.07 per media dollar invested over the 1972–79 period.
Toward a Study of the Poor and Poverty in Ancient Egypt: Preliminary Thoughts
Authors: Driaux Delphine
Published: May 2019

Poverty in ancient Egypt remains a rarely-studied subject. For decades Egyptologists have focused their attention mainly on the so-called ‘elite’, while the poor, their housing, their possessions, their diet, or their cultural values, remain largely in the shadows. Although they are much less visible archaeologically, they were much more numerous than the wealthy. Despite these circumstances, ancient Egypt provides a good starting point for discussing how to approach poverty during antiquity, as there are archaeological and textual records that can shed light on this complex issue. This article aims to stimulate reflection on the issue of poverty in the Nile valley and how it can be explored. It seeks also to add nuance to the idea of a strict dichotomy opposing the poor to the elite. In so doing, this paper will present discussion of the definition of poverty.
Health as the Moral Principle of Post-Genomic Society: Data-Driven Arguments Against Privacy and Autonomy
Authors: SNELL KAROLIINA
Published: May 2019

In Finland, as well as all over the globe, great weight is put on the possibilities of large data collections and ‘big data’ for generating economic growth, enhancing medical research, and boosting health and wellbeing in totally new ways. This massive data gathering and usage is justified by the moral principle of improving health. The imperative of health thus legitimizes data collection, new infrastructures and innovation policy. It is also supported by the rhetoric of health promotion. New arrangements in health research and innovations in the health sector are justified, as they produce health, while the moral principle of health also obligates individual persons to pursue healthy lifestyles and become healthy citizens. I examine how, in this context of Finnish data-driven medicine, arguments related to privacy and autonomy become silenced when contrasted with the moral principle of health.
The Dictates of Conscience: Can They Justify Conscientious Refusals in Healthcare Contexts?
Authors: CARMAN MARY
Published: May 2019

In a recent article in this journal, Steve Clarke (2017) identifies two different bases for conscience-based refusals in healthcare: (1) all-things-considered moral judgments, and (2) the dictates of conscience. He argues that these two bases have distinct roles in justifying conscientious objection. However, accepting that there are these two bases, I argue that both are not able to justify conscientious objection. In particular, I argue that the second basis of the dictates of conscience cannot justify conscience-based refusal in a healthcare context. Even if someone objects in a healthcare context on the basis of the dictates of her conscience, and even if we can explain why she objects with reference to the dictates of her conscience, her objection will only be justified if she makes a judgment.
Airport Disaster Management
Authors: Bergot G.P.
Published: May 2019

Coping with an airport disaster is difficult. It is enough to have once been the witness of such an event to understand the enormity of the problem. Instantaneously, the routine atmosphere becomes a nightmare. There are smoke, flames, vehicles, useful people and useless people and above all, the dead, the injured, and the uninjured survivors, some of whom are running about.

An airport disaster plan should be carefully set up and applied as strictly as possible. Many features exist in our favor: (a) we know the place; (b) we can roughly evaluate in advance the magnitude of the problem as far as the number of victims is concerned, thanks to the International Civil Aviation Organization (ICAO) studies; (c) we can keep in mind the classification of the injured and the medical policy with which now all seem to agree, that is to give on-site immediate care and control evacuation; and (d) we can utilize the medical resources of the surrounding community in a co-ordinated way. This paper summarizes the basic principles for disaster control.
Initial Medical Management of a Mini-Disaster with a Transformer Fire Emitting Polychlorinated Biphenyls
Authors: Saxena K. , Johnson P. , Hryhorezuek D. , Orris P. , Kominsky J.R.
Published: May 2019

On June 22, 1982, the main power transformer at a local high school (St. Paul, Minnesota) overheated, causing the pressure relief valve to operate and release smoke and mist throughout the building. The transformer contained thermal-dielectric fluid with the tradename “Pyranol,” consisting of polychlorinated biphenyls (PCB's) in the form of “Aroclor” and chlorinated benzenes. The transformer did not explode or flame. The emmission characterized by a “white mist” occurred over an approximately 4-hour period with resultant contamination of basement and first floor areas. The temperature of the emission was estimated to be approximately 250-300°F.

“Pyranol” contains PCB aroclor 1260 (45%) and chlorinated benzenes (40% trichloro and 15% tetrachlorobenzenes). Commercial PCB preparations manufactured in the United States have been marketed under the trade name “Aroclor.” Several grades of Aroclor have been designated by numbers such as 1260. The first two digits represent the type of molecule (12 = chlorinated biphenyl). The last wo digits give the weight percent of chlorine.

The fire was discovered by the school janitor and the firefighters arrived at 5:40 a.m. As the firefighters walked near the transformer, several men began complaining of nausea, sore throat and burning of exposed skin. Firefighters having symptoms were asked to go out in the open and were immediately hosed down with water. Initially, 14 firefighters were taken to the emergency room of St. Paul-Ramsey Medical Center, where they were evaluated, treated and released. When inquiry was begun to find out what kind of substance was burning, it was discovered that the transformer which contained “Pyranol” (installed in the school in 1958) had overheated.
Strengthening Aboriginal and Torres Strait Islander health policy: lessons from a case study of food and nutrition
Authors: Browne Jennifer , Gleeson Deborah , Adams Karen , Minniecon Deanne , Hayes Rick
Published: May 2019

Objective:

To examine key factors influencing the prioritisation of food and nutrition in Aboriginal and Torres Strait Islander health policy during 1996–2015.

Design:

A qualitative policy analysis case study was undertaken, combining document analysis with thematic analysis of key informant interviews.

Setting:

Australia.

Participants:

Key actors involved in Aboriginal and Torres Strait Islander health policy between 1996 and 2015 (n 38).

Results:

Prioritisation of food and nutrition in policy reduced over time. Several factors which may have impeded the prioritisation of nutrition were identified. These included lack of cohesion among the community of nutritionists, Aboriginal and Torres Strait Islander leaders and civil society actors advocating for nutrition; the absence of an institutional home for nutrition policy; and lack of consensus and a compelling policy narrative about how priority nutrition issues should be addressed. Political factors including ideology, dismantling of public health nutrition governance structures and missing the opportunities presented by ‘policy windows’ were also viewed as barriers to nutrition policy change. Finally, the complexity and multifaceted nature of nutrition as a policy problem and perceived lack of evidence-based solutions may also have constrained its prioritisation in Aboriginal and Torres Strait Islander health policy.

Conclusions:

Future advocacy should focus on embedding nutrition within holistic approaches to health and building a collective voice through advocacy coalitions with Aboriginal and Torres Strait Islander leadership. Strategic communication and seizing political opportunities may be as important as evidence for raising the priority of Aboriginal and Torres Strait Islander health issues.
First report of genome size and ploidy of the underutilized leguminous tuber crop Yam Bean (Pachyrhizus erosus and P. tuberosus) by flow cytometry
Authors: Pati Kalidas , Zhang Fangning , Batley Jacqueline
Published: May 2019

Cytological understanding is an important parameter to understand the genetic architecture of yam bean. The ploidy level and genome size of two cultivated species of yam bean (Pachyrhizus erosus and P. tuberosus) were estimated using flow cytometric analysis of young leaf tissue, with propidium iodide as a fluorescent dye. Six genotypes of P. erosus and three genotypes of P. tuberosus were analysed. Rice (Oryza sativa cv. Nipponbare) and Mung bean (Vigna radiata cv Berken) were used as internal reference standards. Variation of 2C nuclear DNA content among the six P. erousus lines was 4.18%, ranging from 1.17 to 1.22 pg, whereas only 1.8% variation was observed among the three P. tuberosus lines, which ranged from 1.07 to 1.09 pg. Moreover, it was found that the nuclear DNA content of P. tuberosus was lower than that of P. erosus. The result of the flow cytometric analysis showed that all the species were diploid (2n = 2x) and coefficient of variation (CV%) of all the accessions of the two species was less than 3.5%. This is the first report of ploidy analysis and genome size estimation of the leguminous underutilized tuber crop yam bean using flow cytometry. This result will be helpful for yam bean genome sequencing and crop improvement programmes.
The influence of phenolic compounds on the preference of winter wheat cultivars by cereal aphids
Authors: Leszczyǹski Bogumił , Warchoł Jolanta , Niraz Seweryn
Published: May 2019

The effect of phenolic compounds on the preference for winter wheat cultivars as hosts by cereal aphids and the effect of the phenolics, reported in the leaves of cereals, on feeding intensity of Rhopalosiphum padi (L.) larvae was investigated. Preference for the studied winter wheat cultivars was associated with the level of phenolic compounds naturally occurring in the plants. The tested dihydroxyphenols showed highest inhibition of the feeding of R. padi larvae.
Resistance of four potato varieties to the potato tuber moth, phthorimaea operculella (zell.) in storage
Authors: Ojero M. F. O. , Mueke J. M.
Published: May 2019

Insect-free tubers of four potato varieties, namely Kenya Baraka, Anett, Kerrs Pink and Roslin Gucha were exposed to adult Phlhorimaea operculella for 14 days in uncontrolled conditions in storages. On examination of the tubers 16 days after exposure, the percentage of infested tubers was determined: Kenya Baraka—62.50, Anett—77.50, Kerrs Pink—85.00 and Roslin Gucha—86.25%. The larvae made the following mean tunnel lengths: 44.65, 95.33, 88.33 and 104.23 cm in Kenya Baraka, Anett, Kerrs Pink and Roslin Gucha varieties, respectively. Although there were no statistically significant differences in the number of tubers infested (per cent), there were significant differences in the mean length of tunnels made by the larvae in Kenya Baraka and the other three varieties at P < 0.05. The mean number of larvae which survived in 10 tubers were 6.75, 11.25, 15.75 and 18.00 for Kenya Baraka, Anett, Kerrs Pink and Roslin Gucha varieties, respectively. There were statistically significant differences between Kenya Baraka and Kerrs Pink; Kenya Baraka and Roslin Gucha; and Roslin Gucha and Anett varieties (P < 0.05). Thus Roslin Gucha was the least resistant of the four varieties tested, whereas Kenya Baraka emerged as the most resistant variety. The mechanism of resistance in this case was most probably antibiosis.
The distribution and climbing behaviour of Rhipicephalus appendiculatus Neumann on grass stems
Authors: Chiera J. W.
Published: May 2019

The distribution of Rhipicephalus appendiculatus on Setaria sphacelata flowerheads was investigated. Adult tick counts in a paddock, heavily infested with ticks for experimental purposes, revealed an aggregated distribution by deviating significantly from the expected Poisson distribution, but producing a good fit to the expected negative binomial distribution. A higher proportion of the ticks were on old dry flowerheads than on young green ones. Tests carried out in the laboratory confirmed the marked preference for old flowerheads and the aggregated pattern of distribution. The tick counts in the field revealed no sexual aggregation, though the total number of females collected was significantly higher than that of the males.
Efficacy of natural embelin against the red flour beetle, Tribolium castaneum Herbst
Authors: Chander Harish , Ahmed S. M.
Published: May 2019

The efficacy of natural embelin isolated from berries of Embelia ribes Burm. against Tribolium castaneum Herbst is discussed. Embelin mixed with wheat samples at concentrations of 0.1875% and above exhibited high efficacy by bringing about adult mortality even after 8 months of storage. Productivity (progeny/adult-day) of the test insect was also reduced significantly in treatments as compared to controls at different intervals of storage. After 8 months of storage, significant reduction in F1, progeny at the lowest concentration was mainly due to larvicidal action of embelin. In the present study, embelin did not exhibit any chemosterilant action or contact toxicity to adult beetles. Germination of wheat treated with embelin even at the highest concentration of 0.750% was not impaired to any significant extent.
A compact microstrip lowpass filter with wide stopband using rectangular resonator and high impedance elements
Authors: Kazemi Seyed Hamed , Hayati Mohsen
Published: May 2019

In this paper, a microstrip lowpass filter using rectangular resonators is designed. To weaken the undesired harmonics from 10 to 20 GHz, a stair-shaped suppressing cell and also high impedance elements at the edges are utilized. It should be noted that for analyzing the proposed filter, an LC model is used and the design is done in such a way that the coupling effects of the close-up lines are reduced as much as possible, so that they are ignored in the circuit analysis. The designed filter has a cut-off frequency of 1.01 GHz and the transition band is only 0.1 GHz. In addition to compression of dimensions, the stopband bandwidth is 18.7 times the cut-off frequency (18.7 × fc). The attenuation rate in the passband reaches 0.081 dB which indicates that the passband is flat. In the stopband, disturbing harmonics have been dampened to −23.5 dB and a good bandwidth is achieved. The figure of merit of the proposed filter is 180 387 and it is a good benchmark for the overall comparison of the proposed filter with the previous works.
Content with Failure? Cultural Consolidation and the Absence of Nationalist Mobilization in the Case of the Occitans in France
Authors: Sasaki Yu
Published: May 2019

Does cultural consolidation among ethnic groups lead to nationalist mobilization? Extant research in the study of nationalism suggests a tight connection between the two. My article addresses this question by operationalizing cultural consolidation through language standardization and by providing an empirical analysis. I argue that not all ethnic groups that consolidate their culture build institutions toward sovereignty and propose that cases that fail to invest in institutions make strong contributions to the existing framework in the literature. Following a brief survey on the Bulgarians as a case of successful mobilization, I document evidence from an in-depth study on the Occitans, a minority ethnic group in France, as a failed case. Findings from a process-tracing approach indicate that although the Occitans standardized their language by 1900, their leading intellectuals grew content became content with the situation and failed to make the next move. I contribute by operationalizing cultural consolidation and by introducing “institution-building” as a crucial outcome between cultural consolidation and state-building. My article suggests that decisions of ethnic elites matter to understand why some groups start nationalist mobilization.