Results 61 to 69 of about 355 (69)

Modelling of diameter distributions of Douglas (Pseudotsuga menziesii (Mirb.) Franco) stands

İstanbul Üniversitesi Orman Fakültesi Dergisi, 2016
In this study, Diameter distributions of Amance and Vallombrosa origin stands of Douglas were intendent modelling with two parameter Weibull probability density function having shape and scale parameters for different age periods.
Gafura Aylak Özdemir
doaj   +1 more source

Morfogénesis in vitro de brotes adventicios del pinabete mexicano Pseudotsuga menziesii

Revista Mexicana de Ciencias Forestales, 2019
Pseudotsuga menziesii es una conífera de gran importancia ecológica y económica a nivel mundial. Sus poblaciones nativas en México enfrentan serias dificultades para su regeneración natural, por lo que el cultivo in vitro se plantea como estrategia ...
Florencia Tiberia Aucán García Campusano, Guadalupe Mojarás González, Gema Galindo Flores, Alejandro Ponce Mendoza, Victor Manuel Chávez Ávila, Judith Márquez Guzmán   +5 more
doaj   +1 more source

Cutting forces by oak and douglas fir machining

Maderas: Ciencia y Tecnología, 2014
In this work the multi-factor, non-linear dependencies between main (tangential) FC and normal (radial) FN cutting forces upon two machining parameters by up-routing and down-routing wood of Douglas fir (Pseudotsuga menziesii) and Oak (Quercus petraea ...
Bolesław Porankiewicz, Giacomo Goli
doaj  

Results of 20 years old Douglas-fir provenance experiment established on the northern slopes of Rila Mountain in Bulgaria

Journal of Forest Science, 2014
The purpose of this study is to facilitate the detection of provenances relevant to the reforestation practice in Bulgaria. Studies were carried out in a Douglas-fir provenance trial plantation established at an altitude of 800 m a.s.l.
E.B. Popov
doaj   +1 more source

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and its role in the Czech forests

Journal of Forest Science, 2019
The presented study summarizes the results concerning the effects of cultivation of Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) in the Czech Republic.
Jan Mondek, Martin Baláš
doaj   +1 more source

Determination of Arsenic Amount in Some Trees that Can Be Used as Biomonitors

BioResources
Toxic metals/metalloids such as arsenic are environmental pollutants that are damaging to living organisms. Commonly found metals pose a serious threat to human health unless they are controlled. In this study, the accumulation of As metalloid, which has
Hatice Çobanoğlu, Şemsettin Kulaç
doaj  

Estructura horizontal y diversidad de los bosques de Pseudotsuga menziesii (Mirb) Franco en México

Polibotánica
Evaluar la diversidad permite conocer el estado general de los sistemas ecológicos y el impacto del cambio climático, manejo forestal y otras actividades antrópicas, se ha utilizado con fines prácticos de conservación, monitoreo y gestión de los bosques.
EMANUEL MOLINA MARCHAN, Raúl Narváez Flores, Aldo Saúl Mojica Guerrero   +2 more
doaj   +1 more source

Growth variation of an ambrosia fungus on different tree species indicates host specialization

Frontiers in Insect Science
Ambrosia beetles rely on mutualistic fungi as a food source for themselves and especially for their offspring, yet the influence of host tree species on fungal growth and specialization remains poorly understood. In this study, we investigated the growth
Marcel Hugo Decker, Peter H. W. Biedermann, Lennart J. J. van de Peppel, Jon Andreja Nuotclà   +3 more
doaj   +1 more source

Interannual radial growth response of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) to severe droughts: an analysis along a gradient of soil properties and rooting characteristics

Annals of Forest Science
Key message We analyzed stem growth responses of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) to severe drought in 2003/04 and 2018. The results showed high drought tolerance in sandy, loamy, and most silty soils, with limitations on clayey soils ...
Göran Spangenberg, Reiner Zimmermann, Manfred Küppers, Jürgen Schäffer, Sebastian Hein   +4 more
doaj   +1 more source