Now showing items 1-6 of 6

  • Digested fiber solids : methods for adding value 

    Jensen, Jim; Frear, Craig, 1964-; Ma, Jingwei; Kruger, Chad E.; Hummel, Rita L. (Rita Lynn); Yorgey, Georgine (Pullman, Washington : Washington State University. Extension., 2016-11)
    Anaerobic digestion (AD) of dairy manure and other organic residuals produces biogas, a source of renewable power and fuel, while also benefitting the environment by capturing and converting methane, destroying pathogens ...
  • Environmental injury : cold temperature injury of landscape woody ornamentals 

    Hummel, Rita L. (Rita Lynn); Ophardt, Marianne (Pullman, Washington : Washington State University. Extension., 2016-03)
    A plant's cold hardiness, or its tolerance to freezing temperatures, is genetically determined. However, environmental conditions and cultural practices are factors that also influence a plant's cold hardiness. The seasonal ...
  • Environmental injury : frost cracks 

    Hummel, Rita L. (Rita Lynn); Ophardt, Marianne (Pullman, Washington : Washington State University. Extension., 2016-03)
    Frost cracks, or splits in the tree trunk wood and bark, typically extend longitudinally in the center of the trunk and may appear after unusually cold winters. Scientists do not universally agree on the underlying cause ...
  • Environmental injury : sunscald and sunburn on trees 

    Hummel, Rita L. (Rita Lynn); Ophardt, Marianne (Pullman, Washington : Washington State University. Extension., 2016-03)
    The symptoms of sunscald and sunburn are similar as both injure the cambium (the living cells in a tree just under the bark that give rise to the annual growth ring). Both are due to damaging temperatures, but sunscald is ...
  • Environmental injury : winter burn of evergreens 

    Ophardt, Marianne; Hummel, Rita L. (Rita Lynn) (Pullman, Washington : Washington State University. Extension., 2016-08)
    Winter burn is a type of environmental injury that occurs on evergreen trees and shrubs. This includes needled evergreens such as arborvitae, cedar, fir, juniper, pine, spruce, and yew and broadleaf evergreens such as ...
  • Planting Landscape Plants 

    Maleike, Raymond Robert, 1935-; Hummel, Rita L. (Rita Lynn) (Pullman, Washington : Washington State University. Extension., 1995-08)
    Ever butterflied a root system? You'll be pleasantly surprised by recent discoveries in shrub and tree planting. Follow the photographs (b/w) and text for helpful techniques on site selection and planting of bare-root, ...