Now showing items 1-6 of 6
Global patterns of lake ice phenology and climate: Model simulations and observations
(American Geophysical Union, 1998-11-27)
Lake ice phenology parameters (dates of ice onset and thaw) provide an integrative climatic description of autumn to springtime conditions. Interannual variations in lake ice duration and thickness allow estimates of local ...
accuracy of visible and ultraviolet light for estimating live root proportions with minirhizotrons
(Ecological Society of America, 1995-10)
sampling methods to estimate foliage and other characteristics of individual trees
(Ecological Society of America, 1995-06)
The total foliar area or mass of a tree is difficult to measure, as is its bark or cambial area, and various other components of aboveground biomass. A variety of sampling methods is proposed and estimators of these ...
Spatial and Temporal Variation in Soil and Vegetation Impacts on Campsites
(Ecological Society of America, 1996-05)
We studied the impacts of camping on soil and vegetation at Delaware Water Gap National Recreation Area. We assessed the magnitude of impact on campsites that varied in amount of use and in topographic position. We also ...
sampling-skewed biological populations: behavior of confidence intervals for the population total
(Ecological Society of America, 1999-04)
Four populations were repeatedly sampled with the aim of examining interval estimation of the cumulative amount, T, of some characteristic that has a positively skewed distribution, a feature of many biological populations. ...
Postoptimal linear programming analysis of farm machinery
(American Society of Agricultural and Biological Engineers, 1990)
Linear programming (LP) is a widely used technique for farm machinery selection. Shadow prices from LP models are typically used to identify farm machinery bottlenecks. Shadow prices represent the value of an additional ...