Two-year-old Sitka spruce (Piceasitchensis (Bong.) Cam), Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco), and Japanese larch (Larixleptolepis (Sieb. & Zucc.) Gord.) were cold-stored at 1 °C for to 6 months. In April the end of cold storage period, root growth potential electrolyte leakage from fine roots assessed related plant survival height growth. After storage, seedlings planted on a second-rotation, cultivated site. two experiments in 1989 1990, fine-root was closely correlated...

Two-year-old transplants and undercuts of Piceasitchensis (Bong.) Carr. Pseudotsugamenziesii (Mirb.) Franco were cold-stored (1 °C) for 1 to 7 months ending in April 1989. Their physiological arid morphological condition at lifting after storage was assessed related survival height increment on a reafforestation site one growing season. Physiological assessments made between October root growth potential, tolerance fine roots chronic cold, shoot mitotic index, elongation, electrolyte leakage...

During the winter of 1990–91, fine roots 2‐year‐old, undercut and wrenched Pseudotsuga menziesii, Larix kaempferi, Pinus sylvestris, Picea sitchensis (Alaskan, Queen Charlotte Islands, Oregon) were tested using electrolyte leakage for frost hardiness tolerance to storage at +1°C 30 90 days as excised roots. menziesii P. sylvestris showed only minor changes in root with a maximum — 4°C 7°C respectively. kaempferi developed much greater hardiness; L. had 12°C while (Queen Islands) reached 13°C...

Fine roots were sampled at monthly intervals during 1984–1985 in pure plots of Sitka spruce (Piceasitchensis (Bong.) Carr.) and mixed Scots pine (Pinussylvestris L.) established on an upland heath 1969. Both types planting had received phosphorus potassium fertiliser but no nitrogen. The mean standing crop live (<2 mm diameter) the top 5 cm was 112 g • m −2 , almost double that stands (37 plus 20 pine). Necromass 80% total mass both stand types. Concentrations nitrogen greater than plots,...

Three experiments were established in the 1990s to examine impact of complete residue (brash) and above-ground biomass removal (i.e. 'whole-tree harvesting', WTH) at clearfelling on subsequent growth yield replanted Sitka spruce (Picea sitchensis). The sites varying fertility; two would now be considered 'medium' risk for brash removal, while one a 'high'-risk site. interactions between regular remedial fertilizer applications weed control regimes also investigated each After 10 years, trees...

Fraxinus excelsior L., Fagus sylvatica Betula pendula Roth.and Quercus robur L. seedlings were grown for 1 year with or without an undercutting treatment in July of their first growing season.In the following March, lifted from nursery and subjected to 0, 12 36 h desiccation followed by 0 10 drops m.Morphological measurements, moisture con- tent root electrolyte leakage determined.Field performance was measured after year.The effects undercutting, roughhandling exposure highly species...

<ja:p>The relationship between the condition of bare-rooted 2-year-old seedlings Sitka spruce and larch at time planting their survival growth after 2 years was examined. Data were analysed for experiments using lifted stored +1 °C throughout winter in April also planted directly on different dates without cold storage. Electrolyte leakage from fine roots closely correlated to following direct times September root a more accurate indicator performance than potential. However pattern stock...

Fine-root electrolyte leakage from 2-year-old planting stock of three conifer species was measured on 13 dates between October 1989 and April 1990. The (Piceasitchensis (Bong.) Carr., Pseudotsugamenziesii (Mirb.) Franco, Larixleptolepis (Sieb. &amp; Zucc.) Gord.) were raised using either transplanting or undercutting wrenching regimes. On each lifting date, excised fine roots stored at 1 °C for 30 90 days. deterioration the assessed by comparing values before after storage. As date...

Two-year-old Sitka spruce (Piceasitchensis (Bong.) Carr.) seedlings were lifted from the nursery at different times of year and subjected to known forces by dropping bags plants a height 10, 100, or 300 cm onto concrete floor for varying number (0 135). The response was assessed their growth survival in field experiments, root potential, electrolyte leakage, triphenyl tetrazolium chloride reduction. measured attaching an accelerometer linked oscilloscope collar trees centre each bag....

Summary One-year-old seedlings of Scots pine (Pinus sylvestris L.) four native seed origins (Loch Maree Islands, Glengarry/Glen Morriston, Glen Affric and Abernethy), a commercial British seedlot, seedlot from Hedesunda, in middle Sweden, were compared at monthly intervals October 1993 to April 1994. Seedling morphology, root condition, frost hardiness bud dry matter determined each date. There clear morphological differences among origins. Seedlings raised the (A70) larger but had poorer...

Summary The root frost hardiness of four species amenity broadleaved trees was assessed during the winter 1993/94. This repeated with different 1994/95. Fine roots were sampled every three weeks and subjected to a range freezing temperatures. Damage by electrolyte leakage. There significant differences in among sampling dates. Frost more closely related soil temperature than air or rainfall. Some responded short term fluctuations this response pronounced periods hardening dehardening...

Abstract Transfer learning uses knowledge learnt in source domains to aid predictions a target domain. When and are online, they susceptible concept drift, which may alter the mapping of between them. Drifts online environments can make additional information available each domain, necessitating continuing transfer both from vice versa. To address this, we introduce Bi-directional Online Learning (BOTL) framework, domain others. We two variants BOTL that incorporate model culling minimise...

The ability of the fine root system 2-year-old bare-rooted Picea sitchensis (Bong.) Carr. Queen Charlotte Islands, Oregon and Alaskan provenances, Pseudotsuga menziesii (Mirb.) Franco, Larix kaempferi (Lamb.) Pinus sylvestris L. to withstand standard drying rough handling treatments was tested at regular intervals from September 1990 until April 1991. Electrolyte leakage used quantify damage roots. Stressed seedlings had significantly ( P < 0.001) greater values than untreated dried roughly...

A model was developed that simulated photosynthesis, growth and allocation in tree seedlings. The parameterized with data from experiments on seedlings of sycamore (Acer pseudoplatanus L.), Sitka spruce (Picea sitchensis (Bong) Carr.) young birch trees (Betula pendula Roth.). In these experiments, CO2 concentration ([CO2]) nutrient addition rate were varied. Parameters quantifying uptake, translocation starch synthesis fitted, based control treatments. Elevated [CO2] low-nutrient treatments...

Two-year-old Picea sitchensis (Queen Charlotte Islands and Oregon provenances), Pseudotsuga menziesii, Larix kaempferi, eurolepis, Pinus sylvestris nigra var. maritima were lifted at intervals during two winters planted within 24 h on a nearby second rotation site. Physiological condition planting, measured by root growth potential fine electrolyte leakage, outplanting performance significantly influenced lifting date. There consistent differences in the species' response to Planting out...