Field plots of cv. Russet Burbank potatoes from a
single seedlot were established at four sites over two
seasons (1985-86) in two locations in Oregon to determine
the role of water-borne inoculum of Erwinia carotovora in
plant infection. One site at each location was irrigated
from a surface-water source and...
A number of different systems have been used to estimate boater use over the 1990-2001 period, making it difficult to trace the source of discrepancies in the final estimates. For example, the boater passes have changed over the years.
From 1990-92, boaters would simply check off the river segments they...