The capacity for root growth and concentration of indole-3-acetic acid and abscisic acid in the roots of western hemlock seedlings was investigated. The root regenerating capacity (RRC) was defined as the increase in root length, greater than 5 mm, following a 28-day test period. RRC measurements over a two-year period...
A laboratory study of anaerobically digested sewage
sludge was performed to measure equilibrium constants for
ammonia in the sludge. Measured constants describing the
solution and dissociation of ammonia in sludge were compared
to theoretical constants obtained from thermodynamic data.
No significant difference was found between these two sets
of constants....
The work upon which this publication is based was supported by funds provided by the United States Department of the Interior as authorized under the Water Resources Research Act of 1964, as amended. OWRR Project No. B-016-ORE.
The potato tuberworm, Phthorimaea operculella
(Zeller) (PTW), is one of the most important limitations to
potato, Solanum tuberosum L., productivity worldwide.
Leaves, stems, petioles and more importantly, potato tubers,
in the field and storage can be seriously affected. Due to the
relatively recent arrival of the PTWin the United States...
Summary
1. Woody plant encroachment of grasslands is occurring globally, with profound ecological
consequences. Attempts to restore herbaceous dominance may fail if the woody state is resilient
or if intervention leads to an alternate, undesirable state. Restoration outcomes often
hinge on biotic interactions – particularly on priority effects that inhibit...
Summary
1. Woody plant encroachment of grasslands is occurring globally, with profound ecological
consequences. Attempts to restore herbaceous dominance may fail if the woody state is resilient
or if intervention leads to an alternate, undesirable state. Restoration outcomes often
hinge on biotic interactions – particularly on priority effects that inhibit...
Summary
1. Woody plant encroachment of grasslands is occurring globally, with profound ecological
consequences. Attempts to restore herbaceous dominance may fail if the woody state is resilient
or if intervention leads to an alternate, undesirable state. Restoration outcomes often
hinge on biotic interactions – particularly on priority effects that inhibit...