نتایج جستجو برای: sapling

تعداد نتایج: 572  

Journal: :Forests 2022

Sapling recruitment in hardwood forests is often suppressed by overstory shade, interspecific competition, and browsing pressure from white-tailed deer (Odocoileus virginianus Zimmerman). In some northern stands, these three interacting factors may cause persistent failure of the dominant canopy species, sugar maple (Acer saccharum Marsh.), into sapling size class. this study, we compared initi...

Journal: :Review on agriculture and rural development 2022

In our experiment, we investigated the effect of some most commonly used plant conditioners and yield enhancers in production nursery-gardens reference plantations, which are based on photosynthetic growth parameters saplings productive stocks. The one-year old apple sapling was UEB 3177/1 variety, commertially called Sirius. addition to (such as shoot length stem diameter), total chlorophyll c...

Journal: :Knowledge Based Systems 2023

Many bipartite networks describe systems where an edge represents a relation between user and item. Measuring the similarity either users or items is basis of memory-based collaborative filtering, widely used method to build recommender system with purpose proposing users. When edges network are unweighted, popular common neighbors-based approaches, allowing only positive values, neglect possib...

2010
Katherine A. Holmes Kari E. Veblen Alison M. Berry Truman P. Young

Woodland restoration sites planted with Quercus lobata (valley oak) often have serious invasions of nonnative annual grasses and thistles. Although prescribed fire can effectively control these exotics, restoration managers may be reluctant to use fire if it causes substantial mortality of recently planted saplings. We studied the effects of prescribed fires on the survival and subsequent growt...

Journal: :Journal of Ecology 2022

The authors declare that they have no conflict of interest. peer review history for this article is available at https://publons.com/publon/10.1111/1365-2745.13880. Data used to obtain the results study are Github repository https://github.com/mripasteam/branching and archived via Zenodo https://doi.org/10.5281/zenodo.6368354 (Churski et al., 2022). Supinfo Please note: publisher not responsibl...

Natural regeneration ensures the survival of forest stands and sustainable forest development. The present study was conducted to investigate the natural regeneration of Persian oak (Quercus macranthera fisch. & C.A.Mey. Ex Hohen) stands in Arasbaran protected forest. Measurement of the frequency of standard and coppice regenerations was carried out in one-hectare square plots (100 × 100 m) in ...

Journal: :Tree physiology 2001
K Makkonen H S Helmisaari

We determined fine root biomass and production of 15-, 35- and 100-year-old Scots pine (Pinus sylvestris L.) stands during three growing seasons. Fine roots were sampled by the soil core method. Mean (+/- SE) annual fine root biomass of Scots pine in the 15-, 35- and 100-year-old stands was 220 +/- 25, 357 +/- 21 and 259 +/- 26 g m(-2), respectively. Fine root biomass of the understory vegetati...

Journal: :JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH 2019

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