In forests, the growth and productivity of individual trees stands as a whole are regulated by stand density among other factors, because access to vital resources is limited competition between trees. On 18 experimental plots Scots pine (Pinus sylvestris L.) planted with 500–128,000 trees/ha in south taiga (Middle Siberia), interactions density, tree- stand-scale productivity, tree-ring parame...

afghan pine one of the native tree species in eldar region of azerbaijan republic. fast growing, suited for dry climate condition, increasing wood in unit volume, reason of using eldar pine in reforestation and plantations. at this case study of absheron peninsular of baku, azerbaijan, were taken 14 trees samples of two sites. bbg, baku botanical garden and bmd, baku merdakandendrary, are two c...

Olive trees are a classic component of Mediterranean environments and some of them are known historically to be very old. In order to evaluate the possibility to use olive tree-rings for dendrochronology, we examined by various methods the reliability of olive tree-rings identification. Dendrochronological analyses of olive trees growing on the Aegean island Santorini (Greece) show that the det...

A collection of subfossil wood of Pinus sylvestris (Scots pine) was exposed to X-ray densitometry. The collection of 64 samples from the southern boreal forest zone was dendrochronologically cross-dated to A.D. 673-1788. Growth characteristics were determined by performing density profiles including the following parameters: minimum density, earlywood and latewood boundary density, maximum dens...

The fidelity of inferences on volcanic cooling from tree-ring density records has recently come into question, with competing claims that temperature reconstructions based on tree-ring records underestimate cooling due to an increased likelihood of missing rings or overestimate cooling due to reduced light availability accentuating the response. Here we test these competing hypotheses in the la...

A short rotation system was possible in the Gmelina arborea plantations due to silvicultural techniques that increased their growth rate. The objective of this research was to determine growth rate effects measured in tree diameter on wood density parameters (mean, minimum, maximum and intra-ring variation) and in fiber dimensions (wall thickness, fiber width, lumen diameter and fiber length) o...

A magnetic signature of tree rings was tested as a potential paleo-climatic indicator. We examined wood from sequoia tree, located in Mountain Home State Forest, California, whose tree ring record spans over the period 600 - 1700 A.D. We measured low and high-field magnetic susceptibility, the natural remanent magnetization (NRM), saturation isothermal remanent magnetization (SIRM), and stabili...