Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko),
is a widely distributed species in western north America,
and a major economic pest of wheat (Triticum aestivum L.)
and barley (Hordeum vulgare L.). The objectives of this
study were to : 1) determine the inheritance of seedling and
adult plant resistances in...
Cold hardiness and phenology are important adaptive
traits for perennial plant species in temperate climates.
Timing of growth, dormancy, and associated cold acclimation
and deacclimation represents a delicate balance between
maximizing growth under favorable conditions and minimizing
frost damage under unfavorable conditions. Geographic
patterns of genetic variation in adaptive traits,...
Changes in the type and amount of plant inputs can occur gradually, as with succession, or rapidly, as with harvesting or wildfire. With global change it is anticipated that both gradual and immediate scenarios will occur at increasing frequency. Changes in vegetation inputs alter the quality and quantity of soil...
The purpose of this paper is to illustrate the use of Linear Programming (LP) and
other mathematical procedures to evaluate watershed and perpetuity constraints on forest
land use for a selected scenario in Terengganu, Peninsular Malaysia. The paper describes
the system of modelling and forecasting estimates of potential timber growth,...
Landslides are a natural hazard that have major societal, economic, and
environmental impacts. The understanding of landslides begins with the observation that
they are a spatial problem. Spatial relationships have historically been explored with
maps, and landslides are no different. Such maps range in focus from inventory maps,
To understand the processes that lead to the formation of the oceanic crust, one must know the composition and the depth at which primary melts originate. Towards this end, this dissertation focuses on plagioclase-hosted melt inclusions from plagioclase ultraphyric basalts (PUBs). Plagioclase is usually considered to be the second phase,...
The theoretical analysis of an unseeded, isothermal mixed-suspension
mixed-product-removal (MSMPR) crystallizer with a fines trap is developed.
The lumped parameter system equations are presented for a homogeneous
nucleation and a number-dependent secondary-nucleation model. Linear
stability analysis and system simulations are used to investigate the
system's dynamic behavior.
Modal control algorithms...
Understanding continental crust formation and modification is a fundamental and longstanding geologic problem. Influx of mantle-derived basaltic magma and partial melting of the crust are two ways to drive crustal differentiation. This process results in a low density upper crust and denser, more refractory lower crust, creating significant and vastly...