Journal of Forest Science, 2019 (vol. 65), issue 3
The changes of soil nutrient status after a 10y period in the Natural Forest Region Český lesOriginal Paper
Přemysl Fiala, Dušan Reininger, Tomáš Samek, Markéta Pospíchalová
J. For. Sci., 2019, 65(3):87-95 | DOI: 10.17221/4/2019-JFS 
The periodical survey of forest nutrition was done in the in the Natural Forest Region (NFR) of Český les - the mountain range on a state border between the Czech Republic and the Federal Republic of Germany. The results of chemical analysis done in 2015 were compared with those provided in 2004. The trend of mineral nutrition deteriorating of forest trees has been going on, except for magnesium. The content of magnesium in spruce needles was found to be higher by 56.6 mg.kg-1 in the current year's needles and by 24.8 mg.kg-1 in the previous year´s ones. The contents of magnesium in soil determined in the extract...
Effect of fungal degradation on physicochemical properties of exploited stumps of oriental beech over a 25-year felling period and the obtained Kraft pulp propertiesOriginal Paper
Yasin Rahmati, Kazem Nourmohammadi, Reza Naghdi, Davoud Kartoolinejad
J. For. Sci., 2019, 65(3):96-105 | DOI: 10.17221/93/2018-JFS
Oriental beech (Fagus orientalis Lipsky) is the most important and valuable industrial wood species in the Hyrcanian forests in the north of Iran mainly used for furniture, veneer, composite, and papermaking industries. The present research was conducted in 2014 aimed at investigating the physicochemical changes of the felled oriental beech stumps over a 2-25 year period, and likewise the feasibility of using the given stumps as an alternative resource for wood pulp production. To do so, the effects of in-situ decay of beech stumps on their physical (wet and dry weights...
Investigation of physiological changes in the affected Quercus brantii stand by oak charcoal diseaseOriginal Paper
Mohammad Rostamian, Mohammad Reza Kavosi, Edi Bazgir, Manoochehr Babanezhad
J. For. Sci., 2019, 65(3):106-112 | DOI: 10.17221/107/2018-JFS
The purpose of this work was to monitor the effects of the environmental factors include temperature, precipitation and sun radiation on some physiological aspects of Q. brantii trees in the forest stand involved with the oak charcoal disease during a growing season. We designed a systematic random sampling and all trees were examined for disease status. Our result showed that 70.96% of the trees with different intensities are affected by the charcoal disease. Accordingly, values of predawn leaf water potential (PWP), midday leaf water potential (MWP) and chlorophyll variables showed significant difference in classes of oak...
Assessment of forest road pavement materials one year after restoration (Case study: Asalem forest in northern Iran)Original Paper
Mahsa Hashemi, Ramin Naghdi, Mehrdad Nikooy, Vahid Hemmati
J. For. Sci., 2019, 65(3):113-119 | DOI: 10.17221/68/2018-JFS
The main purpose of this study was evaluating indicators of forest road pavement degradation and their relation with different longitudinal slope classes after one year. Therefore, 30 plots of 100 m2 (10×10 m) area at a distance of 100 meters from each other were selected by a systematic method in the study forest road in the north of Iran. All effective factors on pavement degradation, like longitudinal and transverse slope, crown canopy on top of plots, azimuth and shape of road bed were measured. Additionally, to evaluate the mechanical characteristics of soil, 4 kg soil samples...