Results 261 to 270 of about 306,417 (304)

Random-Parameter Height/Age Models when Stand Parameters and Stand Age are Correlated

Forest Science, 1994
Abstract Height/age curves of dominant trees in a stand can be predicted using models containing random stand and tree parameters. If the population mean curve is estimated from the data where stand-specific parameters are correlated with stand age (e.g., because old stands are growing on poor sites), this correlation may cause biased ...
Lappi, J., Malinen, J.
openaire   +1 more source

Stand density index in uneven-aged ponderosa pine stands

Canadian Journal of Forest Research, 2003
Stand density index (SDI) was developed to quantify relative stand density in even-aged stands. Application of SDI in uneven-aged stands has been described mathematically but not justified biologically. Diameter-class trends in SDI and sapwood area across 14 uneven-aged ponderosa pine (Pinus ponderosa Dougl. ex P. & C.
C W Woodall, C E Fiedler, K S Milner
openaire   +1 more source

Whole-Stand Models for Even-Aged Stands

2012
In the whole-stand approach, quantities such as volume, basal area and/or number of trees per unit area are forecast. The input or predictor variables for whole-stand models are typically age, site index, and stand density. Approaches for ensuring analytic compatibility and numeric consistency between growth and yield estimates are discussed, and a ...
Harold E. Burkhart, Margarida Tomé
openaire   +1 more source

Ageing with long-standing hearing impairment and deafness

International Journal of Rehabilitation Research, 2000
Until recently, ageing with a long-standing disability had not been a major consideration for governments around the world. Policy and planning for this substantial subgroup had not kept abreast with developments in regard to the growing numbers of older people in general. Consultations held in Australia provided information and recommendations for use
openaire   +2 more sources

Strategy to convert an even-aged stratified stand to an uneven-aged mixed species stand

2009
This thesis is the initial step of a long term study to evaluate and monitor a selection silviculture system applied to a 38.9 hectares private woodlot in the Golden moist-warm variant, of the Interior Cedar Hemlock (ICHmw1) zone. It establishes the selection silviculture parameters designed to convert an even-aged stratified mixed species stand ...
openaire   +1 more source

The age hypothesis does not stand up to scrutiny

BMJ, 2012
Schierbeck and colleagues suggested that “initiation of hormone replacement therapy in women early after menopause significantly reduces the risk of the combined endpoint of mortality, myocardial infarction, or heart failure.”1 They invoke …
openaire   +2 more sources

Frost Seeding into Aging Alfalfa Stands

Agronomy Journal, 2001
Little is known about the potential to frost‐seed cool‐season pasture species into mature alfalfa (Medicago sativa L.). Experiments were conducted in 1995 and 1996 near Arlington, WI (four sites), and Lancaster, WI (three sites), to evaluate the establishment and response to seeding rates of five cool‐season grasses and red clover (Trifolium pratense L.
Daniel J. Undersander, David C. West, Michael D. Casler   +2 more
openaire   +1 more source

Estimating Tree Ages in Uneven-Aged Hardwood Stands

Southern Journal of Applied Forestry, 1989
Abstract Two groups of upland hard-wood trees from the same general area were studied by 44 volunteer observers to determine the ability of the observers to visually estimate tree ages. The error of estimate for tree ages varied by the professional category of the observer, and all categoriesof observer improved with training.
openaire   +1 more source

Financial Maturity for Even-Aged and All-Aged Stands

Forest Science, 1983
Abstract The Bentley and Teeguarden even-aged general present net worth model is further generalized to accommodate all-aged stands. The relationship to Chang's forest value, for all-aged stands, is described. Forest Sci. 29:833-836.
openaire   +1 more source

Standing on Holy Ground in the Middle Ages

2022
This book illuminates how the floor surface shaped the ways in which people in medieval western Europe and beyond experienced sacred spaces. The ground beneath our feet plays a crucial, yet often overlooked, role in our relationship with the environments we inhabit and the spaces with which we interact.
openaire   +1 more source