نتایج جستجو برای: diameter increment

تعداد نتایج: 146674  

Journal: :Tree physiology 2009
Britta Eilmann Roman Zweifel Nina Buchmann Patrick Fonti Andreas Rigling

Drought impairs tree growth in the inner-Alpine valleys of Central Europe. We investigated species-specific responses to contrasting water supply, with Scots pine (Pinus sylvestris L.), threatened by drought-induced mortality, and pubescent oak (Quercus pubescens Willd.), showing no connection between drought events and mortality. The two co-occurring tree species were compared, growing either ...

2009
Elhadi Sariali Jean Yves Lazennec Frederic Khiami Yves Catonné

BACKGROUND AND PURPOSE The jumping distance (JD) is the degree of lateral translation of the femoral head center required before dislocation occurs. The smaller the distance, the higher the theoretical risk of dislocation. The aim of our study was to evaluate this jumping distance and its variation according to the characteristics of the implant, and also the theoretical gain in using large hea...

2003
Martti Varmola Hannu Salminen Mauri Timonen

Growth patterns and reactions of Scots pine (Pinus sylvestris L.) to thinning in extremely harsh climatic conditions were studied in two seeded Scots pine stands located on the arctic timberline. Coniferous trees usually do not form closed stands at the timberline, but occur only in scattered tree groups. The trial was established in two stands in 1985–1986 when the trees were at an age of 47 a...

Journal: :The Forestry Chronicle 1931

Journal: :علوم باغبانی ایران 0
حسن احمدی دانشجوی سابق کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران مجتبی دلشاد دانشیار پردیس کشاورزی و منابع طبیعی، دانشگاه تهران مصباح بابالار استاد پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

the aim of this study was to evaluate the effect of different potassium (k) and nitrogen (n) concentrations in nutrient solution and their interaction on growth and quality of tomato transplants. a full factorial experimental design was carried out with three potassium concentrations (1.5, 3 and 6 meql-1) and three nitrogen concentrations (1.5, 3 and 6 meql-1) for 27 days after seed germination...

Journal: :Environmental Modelling and Software 2005
Don C. Bragg

Using loblolly pine, shortleaf pine, white oak, and northern red oak as examples, this paper considers the behavior of potential relative increment (PRI) models of optimal tree diameter growth under data uncertainty. Recommendations on initial sample size and the PRI iterative curve fitting process are provided. Combining different state inventories prior to PRI model development increased samp...

Journal: :American Journal of Applied Mathematics and Statistics 2014

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید