Results 31 to 40 of about 401,779 (196)

Fractal dimension does not adequately describe the complexity of leaf margin in seedlings of Quercus species

open access: yesAnales del Jardín Botánico de Madrid, 2002
We quantified the complexity of leaf margin in a set of Quercus tree species using fractal dimension estimated by the box-counting method (FDb). Leaves were sampled from seedlings in a set of 15 Quercus species with a wide range of leaf morphology (Q ...
Jesús Julio Camarero   +2 more
doaj   +1 more source

Interaction effects of nitrogen and potassium fertilization on anthocyanin composition and chromatic features of Tempranillo grapes

open access: yesOENO One, 2006
A factorial experiment (3 nitrogen and 3 potassium fertilization doses) was carried out in a Tempranillo vineyard located in the 'Ribera del Duero' Apellation d'Origine area (Spain) in 2000.
Rubén Delgado   +2 more
doaj   +1 more source

Predicting the occurrence of iron chlorosis in grapevine with tests based on soil iron forms

open access: yesOENO One, 2010
Aims: Iron deficiency symptoms (leaf chlorosis and depressed growth) are common in grapevine growing on calcareous soils. The objective of this study was to investigate the relationships between these symptoms and the properties of Spanish vineyard soils.
Isabel Díaz de la Torre   +3 more
doaj   +1 more source

Modeling natural mortality for different plant densities in dendroenergetic trials

open access: yesRevista de la Facultad de Ciencias Agrarias, 2021
Mortality was modelled for three species (Acacia melanoxylon, Eucalyptus camaldulensis, Eucalyptus nitens) at three plantation densities (5000, 7500, and 10000 trees ha-1) in an trial of biomass production for purposes of dendroenergetic.
Simon Sandoval   +3 more
doaj   +1 more source

Validation of Reference Genes in a Population of Blueberry (Vaccinium corymbosum) Plants Regenerated in Colchicine

open access: yesPlants, 2022
For the first time we report the validation of reference genes in plants from a population of blueberry (Vaccinium corymbosum) clones cultured in vitro on a colchicine-supplemented medium.
Francisca Valenzuela   +4 more
doaj   +1 more source

Recursos forestales, proyectos de extracción y asientos de maderas en la Nueva España durante el siglo XVIII

open access: yes, 2019
El objetivo de este articulo es estudiar los recursos forestales novohispanos y su aprovechamiento para el desarrollo de la construccion naval espanola en el siglo XVIII.
Rafal Reichert
semanticscholar   +1 more source

XV aniversario CENID COMEF

open access: yesRevista Mexicana de Ciencias Forestales, 2019
La comunidad del Centro Nacional de Investigación Disciplinaria en Conservación y Mejoramiento de Ecosistemas Forestales (Cenid Comef), del Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP) celebra, en 2019, 25 años de ...
Marisela Cristina Zamora Martínez
doaj   +1 more source

Minimum Leaf Conductance (gmin) Is Higher in the Treeline of Pinus uncinata Ram. in the Pyrenees: Michaelis’ Hypothesis Revisited

open access: yesFrontiers in Plant Science, 2022
The search for a universal explanation of the altitudinal limit determined by the alpine treeline has given rise to different hypotheses. In this study, we revisited Michaelis’ hypothesis which proposed that an inadequate “ripening” of the cuticle caused
Amauri Bueno   +9 more
doaj   +1 more source

Mapping social values of ecosystem services: What is behind the map?

open access: yesEcology and Society, 2016
A growing interest in mapping the social value of ecosystem services (ES) is not yet methodologically aligned with what is actually being mapped. We critically examine aspects of the social value mapping process that might influence map outcomes and ...
Laura Nahuelhual   +4 more
doaj   +1 more source

Recursos forestales no maderables en dos comunidades zapotecas de la Sierra Juárez de Oaxaca

open access: yes, 2017
Los recursos forestales no maderables (RFNM) son la parte no lenosa de la vegetacion forestal susceptible de uso, por las poblaciones rurales. En este trabajo se investigaron los principales RFNM, especificamente plantas, empleados en las poblaciones de ...
J. López   +3 more
semanticscholar   +1 more source

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