Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Bernard D. Hill"'
Autor:
Brian L. Beres, Héctor A. Cárcamo, Bernard D. Hill, David K. Weaver, Richard D. Cuthbert, Janet J. Knodel
Publikováno v:
Canadian Journal of Plant Science.
The wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), is a major pest of wheat (Triticum aestivum L.) in the northern Great Plains of North America. The use of solid-stemmed cultivars helps mitigate crop losses and can also affect the
Publikováno v:
Computers and Electronics in Agriculture. 79:82-89
The recent development of tools to automatically monitor important crop attributes in situ such as yield, growth and water use offers an opportunity to relate real-time crop status to current environmental conditions. In this study, continuous minute
Autor:
D. Waterer, Melanie Kalischuk, R. J. Howard, Lawrence M. Kawchuk, Bernard D. Hill, Benoit Bizimungu
Publikováno v:
American Journal of Potato Research. 88:294-301
Bacterial ring rot (BRR) is a regulated disease of potato caused by the gram-positive bacterium Clavibacter michiganensis subsp. sepedonicus. Many countries have seed certification programs that involve pre- and post-harvest inspections for disease s
Publikováno v:
Computers and Electronics in Agriculture. 61:108-116
Cuticle cracking in pepper and tomato fruit was studied in relation to fruit development and modelled with respect to environmental and cultural conditions. All data were collected over a 26-week period from seven commercial greenhouses in British Co
Publikováno v:
Computational and Mathematical Organization Theory. 11:59-85
In the last decade, organizations have spent more on the creation, transformation, and communication of information than on the production of physical goods. The information age has been ushered in by the widespread assimilation of information and co
Publikováno v:
Canadian Journal of Plant Science. 83:467-470
Rainfall was sampled at nine prairie locations and analyzed for lindane and 18 herbicides using a MSD-GC method. 2,4-D was detected in 75% of the 166 samples and in the highest amounts (total seasonal deposits of 18-261 µg m-2). The highest seasonal
Autor:
Dan J. Inaba, K. Neil Harker, James R. Moyer, Bernard D. Hill, Paul Hasselback, Susan D. Byers
Publikováno v:
Water Quality Research Journal. 37:515-542
A study of herbicides in Alberta rainfall was conducted at 17 locations in 1999 and 18 locations in 2000. Rainfall samples (bulk deposition) were collected using a funnel and glass bottle at weekly to biweekly intervals from April to September. Sampl
Publikováno v:
Canadian Journal of Plant Science. 82:481-484
During 1999–2000, we detected phenoxy herbicides in Alberta rainfall at levels as high as 17 to 53 μg L-1, or 60 to 149 μg m-2. In this study, we conducted indoor bioassays to determine whether injury to sensitive crops could occur from such herb
Publikováno v:
Canadian Journal of Plant Science. 82:7-13
The Canadian Wheat Board (CWB) and the railways require accurate predictions of harvest dates to facilitate the movement of grain from the Canadian Prairies. Our objective was to develop neural network (NN) models to predict, 4–8 wk in advance, the
Publikováno v:
Environmental Toxicology and Chemistry. 19:2987-2996
We conducted a field experiment to determine the direct and indirect effects of spraying two broad-spectrum insecticides with widely differing avian toxicities in grassland habitat on the survival and reproductive success of nesting songbirds. Three