The effects of blossom density, bloom phenology, honey bee (Apis mellifera L.) foraging activity and blossom quality on fruit set were examined in three apple cultivars at two Arizona orchard sites. ..."Granny Smith" was the first cultivar to bloom followed by "Delicious" and "Golden Delicious". Compatible pollen was available for the entire "Delicious" bloom period but not for the other two cultivars. "Granny Smith: and "Golden Delicious" bore the greatest number of blossoms per m super(2) of tree canopy and "Delicious" the least at site A; while at site B, flower density of "Delicious" and "Granny Smith" was similar. "Granny Smith" and "Delicious" attracted fewer bees per 100 blossoms than did "Golden Delicious" at site A, and "Granny Smith" and "Golden Delicious" attracted more bees per tree than "Delicious".
Making Two-Lane Roads Safer Krammes, R. A; Hayden, C
Public Roads,
2003, 20030101, Letnik:
66, Številka:
4
Magazine Article, Trade Publication Article
The social, environmental, and economic context in which today's highways are designed demands trade-off assessments that require more explicit and quantitative consideration of safety issues than is ...possible with available tools. The Federal Highway Administration's (FHWA) Interactive Highway Safety Design Model (IHSDM) is a suite of software analysis tools for evaluating safety and operational effects of geometric design decisions on two-lane rural highways. IHSDM will provide highway project planners, designers, and reviewers in State and local departments of transportation (DOTs) and engineering consulting firms with a suite of safety evaluation tools to support these assessments.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Before the dawn of the Information Age and the invention of the computer, safety leaders recognized the need for data on highway traffic crashes as early as the 1920s. A national conference on street ...and highway safety, held in 1924 in Washington, DC, reported, 'Statistics regarding street and highway accidents are so vital to any comprehensive understanding and treatment of the safety problem that their collection and analysis in every State and community are essential.' This statement still rings true; it might be even more important considering the interconnected local, State, and Federal transportation and other systems.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
137.
Swarm traps Schmidt, J.O. (ARS, USDA, Carl Hayden Bee Research Center, Tucson, AZ); Thoenes, S.C; Hurley, R
American bee journal,
07/1989, Letnik:
129, Številka:
7
Magazine Article
