the field experiment was conducted to study the effect of soil moisture tension and potassium on growth and quantitative and qualitative characteristics of thomson navel orange on citrumelo rootstock in kotra citrus research station in ten years (1998-2009). the experiment was designed for four replications in randomized complete blocks with factorial treatment structure. the factors consisted ...

This ar t ic le i s an in troduct ion to the computevsoffwave used by the Potential Relative Increment (PRI) approach to opt imal tree diameter growth modeling. These DOSpvograms extract quali f ied tree andplot data,from the Eastwide Forest Inventory Data Base (EFIDB), calculate relat ive tree increment , sort for the highest relat ive iucrements by diameter class, and generate an ASCIIjile fo...

The main objectives of the study were to (1) determine response diameter growth silver fir, Scots pine, and black pine in Central European seminatural forests tree, stand, environmental factors (2) test for differences their rate on different soils. Based 26,291 permanent sampling plots (500 m² each), we developed a linear mixed-effects model increment each these tree species. models explained ...

      Dust storms are increasingly threatening the forest ecosystem in Western Iran. Due to its coverage of vast area of Zagros forest, the Quercus brantii is at the front line of the attack. Most tree deaths in this forest are from this species. This study aims to investigate the effect of simulated dust on wood development and leaf stomata from seedlings of Persian oak. The oak seedlings were...

The inherent predictability of inter-annual variation in forest productivity remains unknown. Available field-based data sources for understanding this variability differ in their spatial resolution, temporal resolution, and typical units of measure. Nearly all other tree and forest characteristics are in practice derived from measurements of diameter at breast height (DBH). Therefore, diameter...

For maintaining of Zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. To detection of suitable sampling method to study tree Diameter at Breath Height in the northern Zagros forest, Blake forest, in Baneeh region, Kurdistan province, and west of Iran ...