Search results
Results from the WOW.Com Content Network
Both male and female clones are grown. This is the tree most commonly grown in Great Britain and Ireland as Lombardy poplar. [11] 'Manchester' is a cultivar of P. nigra subsp. betulifolia widely planted in northwest England. It is a male clone, and currently seriously threatened by poplar scab disease. [12] [13]
In the Nord department, for example, poplar plantations covered around 18,000 hectares in the early 2000s, i.e. almost twice the size of the region's largest state forest (Forêt de Mormal), but with a highly variable rate (almost 0% in the Dunkirk area, compared with 1.3% in the Nord and 0.7% in the Pas-de-Calais, according to the Agreste-SAA ...
PAI may go negative if a tree loses volume due to damage or disease. Periodic annual increment is commonly used instead of current annual increment as a basis for computing growth per cent. Growth per cent indicates the rate of increase with relation to the wood capital required for its production, this is usually based on a single year's ...
Populus is a genus of 25–30 species of deciduous flowering plants in the family Salicaceae, native to most of the Northern Hemisphere.English names variously applied to different species include poplar (/ ˈ p ɒ p l ər /), aspen, and cottonwood.
'Moline' is distinguished by its narrow but open form, with a single central trunk likened to a Lombardy Poplar when young, [4] the branches of the older trees being ultimately horizontal. [5] The leaves, of a dark rich shade of green, [6] could be exceptionally broad, measuring 15 cm across. [1] [3] [7] [8]
Populus tremuloides is a deciduous tree native to cooler areas of North America, one of several species referred to by the common name aspen.It is commonly called quaking aspen, [2] [3] [4] trembling aspen, [2] [3] American aspen, [3] mountain or golden aspen, [5] trembling poplar, [5] white poplar, [5] and popple, [5] as well as others. [5]
The equation for exponential mass growth rate in plant growth analysis is often expressed as: = Where: M(t) is the final mass of the plant at time (t). M 0 is the initial mass of the plant. RGR is the relative growth rate. RGR can then be written as:
Tree girth measurement diagram. Tree girth is a measurement of the circumference of tree trunk. It is one of the most ancient, quickest, and simplest of foresters' measures of size and records of growth of living and standing trees. The methods and equipment have been standardized differently in different countries.