Results 251 to 260 of about 309,576 (290)

Modeling the date of leaf appearance in low-arctic tundra

Global Change Biology, 2007
AbstractOne of the reported changes of arctic ecosystems in response to warming climate is the advance of the leaf appearance in spring. Such phenological changes play a role in the structural changes within tundra ecosystem communities. Recently, we developed a model that estimates the leaf appearance date for deciduous trees in taiga.
Nicolas Delbart, Ghislain Picard
exaly   +4 more sources

Comparison of models to simulate leaf appearance in wheat

European Journal of Agronomy, 1995
Prediction on of leaf appearance in cereals is important for modelling canopy development and timing crop management practices. Four models which aim to predict leaf emergence on the basis of temperature and, in three cases, photoperiod are compared against independent data from a wide range of sites, sowing dates and cultivars of spring and winter ...
Marco Bindi, Franco Miglietta
exaly   +3 more sources

Prediction of leaf appearance in wheat: a question of temperature

Field Crops Research, 1995
Abstract The rate of leaf appearance in wheat depends on temperature. When the rate is expressed in thermal time based on air temperature, a marked contrast is apparent between autumn and spring sowings. This variation has often been attributed to a preconditioning response that determines the thermal phyllochron at about the time of emergence ...
Ian R Brooking
exaly   +2 more sources