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Journal articles on the topic "Radiata pine"
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Helms, John A. "Radiata Pine." Journal of Forestry 117, no. 2 (February 19, 2019): 184. http://dx.doi.org/10.1093/jofore/fvy076.
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Plugatar, Yu V., T. M. Sakhno, I. V. Bulavin, O. M. Shevchuk, and S. A. Feskov. "Morphology, anatomy and essential oil characterization of Pinus radiata needles in the conditions of the Southern Coast of the Crimea." IOP Conference Series: Earth and Environmental Science 843, no. 1 (November 1, 2021): 012046. http://dx.doi.org/10.1088/1755-1315/843/1/012046.
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Abstract The paper presents data on the dendrometric parameters, a needle anatomy and an essential oil characterization of a radiate pine (Pinus radiata D. Don) in the conditions of the Southern Coast of the Crimea. The research was carried out on the model trees (age 70-80 years) growing in the territory of the Montedor Park. For research collected pine needles radiant cuts were made on the freezing microtome (MZ-2, Ukraine), were stained with Sudan III and examined with a light microscope Mikmed-5 (LOMO, Russia) equipped with a digital camera MS-3 (LOMO, Russia). The essential oil from the needles was extracted by hydrodistillation on Ginsberg devices and examined on a gas chromatograph 6890N (Agilent Technology, USA). The studies showed that radiata pine trees achieve their genetically determined parameters, compared to those in the nature habitats in Monterey (California, USA). A needle anatomical investigation clearly demonstrated typical structure. In the essential oil composition, predominance of monoterpenes, in particular a-and (3-pinenes with a large content of the latter was demonstrated. The peculiarity of P. radiata essential oil under the conditions of the Southern Coast of the Crimea, compared to some other regions, was the presence of limonene, which determined the stronger coniferous smell.
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Gordon, Thomas R., Dorothy Okamoto, Andrew J. Storer, and David L. Wood. "Surfactants Improve the Susceptibility of Five Landscape Pines to Pitch Canker Disease, Caused by Fusarium subglutinans f. sp. pini." HortTechnology 9, no. 1 (January 1999): 132. http://dx.doi.org/10.21273/horttech.9.1.132.
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Pitch canker, caused by Fusarium subglutinans f. sp. pini, causes branch die-back and stem cankers in many species of pine. Monterey pine (Pinus radiata D. Don), one of the most widely planted pines in the world, is extremely susceptible to pitch canker. Four other pine species, which might serve as alternatives to Monterey pine in landscape settings, were found to be relatively resistant, based on the size of lesions resulting from branch inoculations under greenhouse conditions. Of these species, Japanese black pine (P. thunbergiana Franco) was the most resistant, followed by Canary Island pine (P. canariensis Sweet ex K. Spreng), Italian stone pine (P. pinea L.), and Aleppo pine (P. halepensis Mill.). Consistent with these findings, a field survey conducted in Alameda County, Calif., revealed Monterey pine to have the highest incidence of infection, with significantly lower levels in Aleppo, Canary Island, and Italian stone pines. Japanese black pine was not observed in the survey area.
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Gordon, Thomas R., Dorothy Okamoto, Andrew J. Storer, and David L. Wood. "Susceptibility of Five Landscape Pines to Pitch Canker Disease, Caused by Fusarium subglutinans f. sp. pini." HortScience 33, no. 5 (August 1998): 868–71. http://dx.doi.org/10.21273/hortsci.33.5.868.
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Pitch canker, caused by Fusarium subglutinans f. sp. pini, causes branch dieback and stem cankers in many species of pine. Monterey pine (Pinus radiata D. Don), one of the most widely planted pines in the world, is extremely susceptible to pitch canker. Four other pine species, which might serve as alternatives to Monterey pine in landscape settings, were found to be relatively resistant, based on the size of lesions resulting from branch inoculations under greenhouse conditions. Of these species, Japanese black pine (P. thunbergiana Franco) was the most resistant, followed by Canary Island pine (P. canariensis Sweet ex K. Spreng), Italian stone pine (P. pinea L.), and Aleppo pine (P. halepensis Mill.). Consistent with these findings, a field survey conducted in Alameda County, Calif., revealed Monterey pine to have the highest incidence of infection, with significantly lower levels in Aleppo, Canary Island, and Italian stone pines. Japanese black pine was not observed in the survey area.
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Graham, Natalie, Emily Telfer, Tancred Frickey, Gancho Slavov, Ahmed Ismael, Jaroslav Klápště, and Heidi Dungey. "Development and Validation of a 36K SNP Array for Radiata Pine (Pinus radiata D.Don)." Forests 13, no. 2 (January 24, 2022): 176. http://dx.doi.org/10.3390/f13020176.
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Radiata pine (Pinus radiata D.Don) is one of the world’s most domesticated pines and a key economic species in New Zealand. Thus, the development of genomic resources for radiata pine has been a high priority for both research and commercial breeding. Leveraging off a previously developed exome capture panel, we tested the performance of 438,744 single nucleotide polymorphisms (SNPs) on a screening array (NZPRAD01) and then selected 36,285 SNPs for a final genotyping array (NZPRAD02). These SNPs aligned to 15,372 scaffolds from the Pinus taeda L. v. 1.01e assembly, and 20,039 contigs from the radiata pine transcriptome assembly. The genotyping array was tested on more than 8000 samples, including material from archival progenitors, current breeding trials, nursery material, clonal lines, and material from Australia. Our analyses indicate that the array is performing well, with sample call rates greater than 98% and a sample reproducibility of 99.9%. Genotyping in two linkage mapping families indicated that the SNPs are well distributed across the 12 linkage groups. Using genotypic data from this array, we were also able to differentiate representatives of the five recognized provenances of radiata pine, Año Nuevo, Monterey, Cambria, Cedros and Guadalupe. Furthermore, principal component analysis of genotyped trees revealed clear patterns of population structure, with the primary axis of variation driven by provenance ancestry and the secondary axis reflecting breeding activities. This represents the first commercial use of genomics in a radiata pine breeding program.
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Qin, Ye, Fei Qi, Zhiping Wang, Xianbao Cheng, Botao Li, Anmin Huang, and Ru Liu. "Comparison on Reduction of VOCs Emissions from Radiata Pine (Pinus Radiata D. Don) between Sodium Bicarbonate and Ozone Treatments." Molecules 25, no. 3 (January 22, 2020): 471. http://dx.doi.org/10.3390/molecules25030471.
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Volatile organic compounds (VOCs) in wood furniture are an important factor that affects indoor air quality. In this study, radiata pine (Pinus radiata D. Don) was treated with sodium bicarbonate and ozone aqueous solution to reduce the VOC contents without sacrificing mechanical properties. The VOCs of radiata pine were identified by gas chromatography-mass spectrometry (GC-MS), and the functional group changes of wood samples were characterized by Fourier-transform infrared spectroscopy (FTIR). The results showed that the main VOCs of radiata pine include alkenes, aldehydes, and esters. The sodium bicarbonate and ozone treatments almost eliminated the VOC contents of radiata pine. The two treatments mentioned above had little effect on compressive strength and surface color of radiata pine.
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Wilkes, P., and L. J. Bren. "Radiata pine pruning technology." Australian Forestry 49, no. 3 (January 1986): 172–80. http://dx.doi.org/10.1080/00049158.1986.11978489.
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Liu, Hua Wu, Ping Xu, and Kai Fang Xie. "Modelling the Grain Pattern and Orientation in Radiata Pine Boards." Advanced Materials Research 189-193 (February 2011): 1737–40. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1737.
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This study developed new algorithms to simulate the grain pattern and orientation of radiata pine boards based on the geometrical and growth features of radiata pine trees. Scenario simulation is presented in the article. The established methodology offers insights for sawmills to establish feasible log breakdown strategies and maximize radiata pine timber value.
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Bloomberg, M., J. R. Sedcole, E. G. Mason, and G. Buchan. "Hydrothermal time germination models for radiata pine (Pinus radiataD. Don)." Seed Science Research 19, no. 3 (September 2009): 171–82. http://dx.doi.org/10.1017/s0960258509990031.
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AbstractThe objective of this study was to fit a hydrothermal germination model to germination data for a seedlot of radiata pine (Pinus radiataD. Don). Seeds were incubated for 50 d at constant temperatures and water potentials (T = 12.5–32.5°C, Ψ = 0 to − 1.2 MPa). Most seeds completed germination within 50 d, but for low Ψ and/or non-optimal temperatures (T < 17.5°C,T>25°C) many seeds did not complete germination. In general, germination data conformed to the hydrothermal model. Departures from the model were encountered for slow-germinating seeds at suboptimal temperatures (T ≤ 20°C). To account for these departures, two alternative hydrothermal models were fitted with an additional term for an upwards shift in seed base water potential with increasing time to germination. The alternative models more correctly predicted germination time than the original model. Similarly, reduced percentage germination at supra-optimal temperatures (T>20°C) was explained by including a term in the hydrothermal model which shifted the base water potential of seeds upwards towards zero, which in turn reduced the predicted rate that hydrothermal time would be accumulated by seeds. The rate of this upwards shift in base water potential was dependent on time to complete germination and ambient water potential as well as supra-optimal temperature.
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Dean, C. A., P. P. Cotterill, and R. D. Burdon. "Early Selection of Radiata Pine." Silvae Genetica 55, no. 1-6 (December 1, 2006): 182–91. http://dx.doi.org/10.1515/sg-2006-0025.
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Abstract Additive genetic, dominance genetic and phenotypic variances and corresponding correlations were estimated for growth data collected from disconnected half-diallel progeny trials involving 25 Pinus radiata D. DON parents and replicated across two sites in central North Island, New Zealand. Sectional area of stem was measured at three, seven, 10 and 13 years after planting at both sites, and height at three and 10 years at one site. Sectional area at three years exhibited similar levels of estimated additive (σA2) and dominance (σD2) genetic variance. However, levels of σD2 remained approximately constant between three and 13 years while σA2 increased substantially. Thus, sectional-area growth changed from being under equal additive and dominance genetic control at three years to almost complete additive genetic control from seven to 13 years. The greater increase in additive variance relative to phenotypic variance led to increases in individual heritability from 0.16 to 0.28 to 0.35 for sectional-area increments between 3-7, 7-10 and 10-13 years, respectively. Height growth exhibited negligible levels of σD2 for the three- and 10-year measurements. The early sectional-area increment between 3-7 years showed an estimated additive genetic correlation of 0.87 with “mature” sectional area at 13 years. Subsequent sectional-area increments between 7-10 and 10-13 years showed estimates of additive genetic correlations of 0.99 with sectional area at 13 years. Dominance genetic correlations were much lower in magnitude, reflecting inconsistent dominance effects over time.
Dissertations / Theses on the topic "Radiata pine"
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Welsh, Shayne. "Hormonal control of wood formation in radiata pine." Thesis, University of Canterbury. Biological Sciences, 2006. http://hdl.handle.net/10092/968.
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Pinus radiata is by far the dominant species grown in New Zealand plantations as a renewable source of wood. Several wood quality issues have been identified in the material produced, including the high incidence of compression wood, which is undesirable for end users. At present our understanding of the complex array of developmental processes involved in wood formation (which has a direct bearing on wood quality) is limited. Hence, the forest industry is interested in attaining a better understanding of the processes involved. Towards this goal, and for reasons of biological curiosity, the experiments described in this thesis were carried out to investigate several aspects of xylem cell development. In an in arbor study, changes in the orientation of cortical microtubules and cellulose microfibrils were observed in developing tracheids. Results obtained provide evidence that cortical microtubules act to guide cellulose synthase complexes during secondary wall formation in tracheids. The mechanisms involved in controlling cell wall deposition in wood cells are poorly understood, and are difficult to study, especially in arbor. A major part of this thesis involved the development of an in vitro method for culturing radiata pine wood in which hormone levels, nutrients, sugars and other factors, could be controlled without confounding influences from other parts of the tree. The method developed was used in subsequent parts of this thesis to study compression wood development, and the influence of the hormone gibberellin on cellulose microfibril organisation in the cell wall. Results from the in vitro compression wood experiments suggested that: 1. when a tree is growing at a lean, the developing cell wall was able to perceive compressive forces generated by the weight of the rest of the tree, rather than perceive the lean per se. 2. ethylene, rather than auxin, was involved in the induction of compression wood. Culture of stem explants with gibberellin resulted in wider cells, with steeper cortical microtubules, and correspondingly steeper cellulose microfibrils in the S2 layer of developing wood cells. This observation provides further evidence that the orientation of microtubules guides the orientation of cellulose microfibrils. Overall, the work described in this thesis furthers our knowledge in the field of xylem cell development. The stem culture protocol developed will undoubtedly provide a valuable tool for future studies to be carried out.
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Hsu, Ching Yi. "Radiata pine wood anatomy structure and biophysical properties." Thesis, University of Canterbury. Forestry, 2003. http://hdl.handle.net/10092/7202.
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Several important characteristics such as density, acoustic velocity, modulus of elasticity and tracheid dimensions are examined in stemwood, branchwood and
rootwood in young (age 3 and 7) Pinus radiata. Stemwood air-dry density decreases little from ground level to the top of the tree falling gradually from 415 kg/m³ to 405 kg/m³. Branchwood air-dry density is higher than stemwood density. The branchwood density is approximately 480 kg/m³ close to the stem and then decreases sharply to ca.
410 kg/m³ near the branch tips. Rootwood density at 12% moisture content is similar to stemwood density ranging between 420 and 405 kg/m³. Density varies from stemroot junction to root tip in lateral roots (420 to 405 kg/m³) but changes little along tap roots (405 kg/m³)
In stemwood, the air-dry modulus of elasticity increases from ground level (ca. 2.5-3.5 GPa) to approximately 4 metres (ca. 5.5-6.5 GPa) and then decreases thereafter to
7 metres (ca. 2.5-3.5 GPa). The air-dry MOE of branchwood decreases linearly with tree height up the stem from approximately 4.5 GPa at 1 metre to 3 GPa at 6 metres.
Roots are the least stiff part of the tree. The air-dry MOE value decreases along roots from the stem-root junction (ca. 1.9 GPa) to the root tip area (0.5 GPa) in lateral roots, and from 1.4 GPa to 0.4 GPa in tap roots.
In stemwood and rootwood the tracheid dimensions change with distance from ground level in both directions with significant different patterns. For stemwood, the tracheid length decreases with height up the stem. The mean tracheid length is approximately 1.70 mm at breast height whereas it is 1.55 mm and 1.40 mm at 2.4 metres and 4.6 metres respectively. Rootwood tracheids are much longer (nearly double) than stemwood tracheids. The tracheid length increases with increasing distances from the stem-root junction. The mean tracheid length adjacent to the stemroot junction area is approximately 2.2 mm whereas for the middle and root tip areas it is 2.6 mm and 3.3 mm respectively.
Compression wood is a common feature of stem and branchwood. However, this atypical tissue is absent in roots except in some restricted instances where compression wood extends a short distance from the stem down into the root.
Branchwood in green condition can be used to predict volume-weighted stemwood qualities at 12% moisture content when specific conditions are applied (select a straight portion of first branch segment from the largest diameter branch at breast height, R2 = 0.64). However, this approach has little practical appeal as equally good or better correlations can be obtained using Fakopp on standing trees (R2 = 0.75). Therefore future work should focus solely on the use of time of flight instruments such as Fakopp on stemwood.
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Bloomberg, Mark. "Modelling germination and early seedling growth of radiata pine." Lincoln University, 2008. http://hdl.handle.net/10182/681.
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Background: This study seeks to model aspects of the regeneration of radiata pine (Pinus radiata D.Don) seedlings under a range of environmental conditions. This study investigated whether “hybrid” mechanistic models, which predict plant growth and development using empirical representations of plant physiological responses to the environment, could provide a realistic alternative to conventional empirical regeneration models. Objectives: The objectives of this study were to 1) identify the functional relationships between the environmental conditions controlling germination, establishment and growth of radiata pine seedlings, under a range of those environmental conditions as specified by temperature and available light and soil water; and 2) specify those functional relationships in hybrid mechanistic (“hybrid”) models. Methods: Radiata pine seedling germination and growth were measured under controlled environmental conditions (incubators for seed germination, growth cabinets for seedlings), and results used to adapt, parameterise and test two published hybrid models; one for germination (the hydrothermal time model); and one for seedling growth in the first six months after germination, based on plant radiation use efficiency (RUE). The hydrothermal model was tested by incubating commercial radiata pine seeds under factorial combinations of temperature and water potentials where germination was likely to occur (12.5 ºC to 32.5 ºC and 0 MPa to –1.2 MPa.). 100 seeds were germinated for each factorial combination. The hydrothermal germination model was fitted to the germination data using non-linear regression modles, will allowed simultaneous estimation of all modle parameters. Seedlings were grown in controlled growth cabinets, and their RUE was calculated as the ratio of net primary production (NPP, specified in terms of an increase in oven dry biomass), to PAR intercepted or absorbed by a seedling. Estimation of seedling RUE required development of novel techniques for non-destructive estimation of seedling oven dry weight, and measurement of PAR interception by seedlings. The effect of varying PAR flux density on RUE was tested by measuring RUE of seedlings grown at 125, 250 and 500 µmol m⁻² s⁻¹. In a second experiment, the effect of deficits in available soil water on RUE was tested by measuring RUE of seedlings grown under 250 µmol m⁻² s⁻¹ PAR flux, and at different levels of available soil water. Available soil water was specified by a soil moisture modifier factor (ƒθ) which ranges between 1 for moist soils and 0 for soils where there is insufficient water for seedling growth. This soil moisture modifier had not previously been applied in studies of tree seedling growth. Temperatures for both seedling experiments were a constant 17.5 ºC (day) and 12.5 ºC (night). Results: Hydrothermal time models accurately described radiata pine seed germination. Model predictions were closely correlated with actual seed germination over the full range of temperature and water potentials where germination was likely to occur (12.5 ºC to 32.5 ºC and 0 MPa to –1.2 MPa. The minimum temperature for germination (base temperature) was 9.0 ºC. Optimum temperatures for germination ranged from ~20ºC for slow-germinating seeds to ~27 ºC for the fastest germinating seeds. The minimum water potential for seed germination varied within the seed population, with an approximately normal distribution (base water potential = –1.38 MPa, standard deviation of 0.48 MPa). In the process of developing the model, a novel explanation for the decline in germination rates at supra-optimal temperatures was developed (Section 3.4.6), based on earlier models proposed by Alvarado & Bradford (2002) and Rowse & Finch-Savage (2003). This explanation was that the decline in germination rate was not driven just by temperature, but by accumulated hydrothermal time above the base temperature for germination (T₀). This in turn raised the base soil water potential (Ψb) towards 0, so that the reduction in germination rate arose from a reduced accumulation of hydro-time, rather than from thermal denaturation of enzymes facilitating germination – the conventional explanation for non-linear accumulation of thermal time at supra-optimal temperatures for plant development. Upwards adjustment (towards 0 MPa) of base water potentials of germinating seeds occurred also at very cold temperatures in combination with high water potentials. In both cases (very cold or else supra-optimal temperatures) this upwards adjustment in base water potentials prevented germination of part of the seed population, and is proposed as a mechanism which enables seed populations to “hedge their bets” when germinating under less than ideal germination conditions. RUE of young germinated radiata pine seedlings growing in a controlled growth cabinet was not significantly different over a range of constant PAR flux densities. Mean RUE’s were 3.22, 2.82 and 2.58 g MJ⁻¹ at 125, 250 and 500 µmol m⁻² s⁻¹ respectively. In the second experiment, the novel use of a soil moisture modifier (ƒθ) to predict RUE of seedlings subjected to water stress proved successful within a limited range of soil water stress conditions. Measured seedling transpiration and stomatal conductance were closely correlated but seedling photosynthesis was less correlated with available soil water. This result suggests that photosynthesis was not coupled with stomatal conductance when PAR flux was 250 µmol m⁻² s⁻¹, which is well below saturating irradiance for C₃ plants. Conclusions: The use of hybrid, quasi-mechanistic models to describe tree seedling growth has been seldom explored, which necessitated the development of novel experimental and analytical techniques for this study. These included a predictive model of germination decline at sub- and supra-optimal temperatures; a method for accurately estimating seedling dry weights under a range of PAR flux densities; and a novel method for estimating light interception by small seedlings. The work reported in this thesis showed that existing hybrid models (the hydrothermal time germination model and the RUE model) can be adapted to model germination and growth of radiata pine seedlings under controlled environmental conditions. Nonetheless, further research is needed before the models can be confidently used as an alternative to conventional empirical models to model regeneration in “real-world” forests. Research priorities are the performance of hydrothermal germination models under variable field conditions, and the use of the soil moisture modifier for seedlings growing on a range of soil textures and under a range of PAR fluxes.
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Zou, Chris Bocai. "Soil physical properties and root growth of radiata pine." Thesis, University of Canterbury. Forestry, 1999. http://hdl.handle.net/10092/7493.
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Soil water potential decreased exponentially and soil strength increased logarithmically as the volumetric water content decreased in soils of contrasting texture at a range of bulk densities. Soil air-filled porosity was a linear function of volumetric water content.
At constant soil strength and non-limiting soil air-filled porosity (≥ 0.16 cm³ cm-³ the root elongation rate of radiata pine seedlings decreased linearly with soil water potential in the range - 0.01 to - 0.20 MPa. The rate of decrease in elongation rate was reduced with increasing soil strength. When soil water potential was < - 0.20 MPa, the root elongation rate was linearly related to the log of negative soil water potential. The root elongation rate decreased exponentially with increase of soil strength at constant soil matric potential and non-limiting air-filled porosity. This relationship was independent of both soil water potential and soil texture. However the diameters of both root and root tip increased, but root biomass decreased with increase of soil strength.
There was no significant osmotic regulation at water potentials in the rooting media of ≥
- 0.2 MPa. Osmotic regulation commenced at < - 0.20 MPa and this partially compensated for the turgor loss from water stress. The wall yielding coefficient decreased with loss of turgor. The reduction in the root elongation rate with decreased water potential was an integrated effect of both decreased turgor pressure and reduced wall yielding coefficient. Roots osmotically regulated against increasing soil strength. No significant relationship between yield turgor pressure and both water potential and soil strength was observed.
When soil air-filled porosity was non-limiting, root elongation rate in soil (∆R) was determined by soil matric potential (Ψm) and soil strength (Q) and was best described by a non-linear model: ∆R = α e-βQ + γѰm. The effect of water potential in decreasing root growth was most pronounced at low soil strength. Roots of radiata pine are able to penetrate higher soil strength at higher soil matric potential, and root growth of radiate pine seedlings ceased at higher soil matric potential in compacted soil than in loose soil.
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Pagliarini, Maximiliano Kawahata. "Genotype by environment interaction in slash pine and methodologies comparison for radiata pine wood properties /." Ilha Solteira, 2016. http://hdl.handle.net/11449/141895.
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Orientador: Ananda Virginia de AguiarAbstract: Exotic forest species have been introduced in Brazil in order to promote improvements in socioeconomic development and help to reduce the pressure caused to native forests. With growing demand for these species, research on genetic improvement has increased to find new, more productive germplasm and preferably in less time. Two species were used in the study: slash pine (Pinus elliottii Engelm. var. elliottii) and radiata pine (Pinus radiata D. Don). The first part of the study had the purpose to identify the stability, adaptability, productivity and genetic parameters, in addition to selection gain and genetic divergence in slash pine open pollinated second generation progenies considering phenotypic trait. Two tests were established, one in Ponta Grossa-PR with 24 progenies and one in Ribeirão Branco-SP with 44 progenies, both in Brazil, to identify the most productive genotypes for commercial planting areas in both sites. There was significant variation (p<0.01) among progenies for growth and form traits. The high coefficients of genetic variation for wood volume (14.31% to 16.24% - Ribeirão Branco-SP and 31.78% to 33.77% - Ponta Grossa-PR) and heritability (0.10 to 0.15 – Ribeirão Branco-SP and 0.36 to 0.48 – Ponta Grossa-PR) have shown low environmental influence on phenotypic variation, which is important for the prediction of genetic gain by selecting and confirming genetic potential in both places, especially Ponta Grossa. The effect of genotype x environment interact... (Complete abstract click electronic access below)
Resumo: Espécies exóticas de Pinus foram introduzidas no Brasil para promoverem o crescimento socioeconômico do país e ajudar na redução da pressão causada pelo uso de florestas nativas Com a crescente demanda por essas espécies, pesquisas em melhoramento genético tem aumentado na busca de novos germoplasma mais produtivos em menor tempo. Duas espécies foram utilizadas no presente trabalho: Pinus elliottii Engelm. var. elliottii e Pinus radiata D. Don. A primeira parte do trabalho teve a finalidade de identificar a estabilidade, a adaptabilidade, a produtividade e os parâmetros genéticos, além do ganho de seleção e diversidade genética em progênies de polinização aberta de segunda geração de P. elliottii var. elliottii considerando os caracteres fenotípicos. Foram estabelecidos dois testes, um em Ponta Grossa-PR com 24 progênies e outro em Ribeirão Branco-SP com 44 progênies visando identificar os genótipos mais produtivos para áreas de plantio comercial em ambos locais. Foi observada variação significativa (p<0,01) entre as progênies para os caracteres de crescimento e alguns caracteres de forma. Os altos coeficientes de variação genética para volume de madeira (14,31% a 16,24% - Ribeirão Branco e 31,78% a 33,77% - Ponta Grossa) e herdabilidade (0,10 a 0,15 – Ribeirão Branco e 0,36 a 0,48 – Ponta Grossa) mostraram baixa influência do ambiente na variação fenotípica, o que é importante para a predição do ganho genético mediante a seleção e confirmam potencial genético em ambos os loc... (Resumo completo, clicar acesso eletrônico abaixo)
Doutor
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Pagliarini, Maximiliano Kawahata [UNESP]. "Genotype by environment interaction in slash pine and methodologies comparison for radiata pine wood properties." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/141895.
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Espécies exóticas de Pinus foram introduzidas no Brasil para promoverem o crescimento socioeconômico do país e ajudar na redução da pressão causada pelo uso de florestas nativas Com a crescente demanda por essas espécies, pesquisas em melhoramento genético tem aumentado na busca de novos germoplasma mais produtivos em menor tempo. Duas espécies foram utilizadas no presente trabalho: Pinus elliottii Engelm. var. elliottii e Pinus radiata D. Don. A primeira parte do trabalho teve a finalidade de identificar a estabilidade, a adaptabilidade, a produtividade e os parâmetros genéticos, além do ganho de seleção e diversidade genética em progênies de polinização aberta de segunda geração de P. elliottii var. elliottii considerando os caracteres fenotípicos. Foram estabelecidos dois testes, um em Ponta Grossa-PR com 24 progênies e outro em Ribeirão Branco-SP com 44 progênies visando identificar os genótipos mais produtivos para áreas de plantio comercial em ambos locais. Foi observada variação significativa (p<0,01) entre as progênies para os caracteres de crescimento e alguns caracteres de forma. Os altos coeficientes de variação genética para volume de madeira (14,31% a 16,24% - Ribeirão Branco e 31,78% a 33,77% - Ponta Grossa) e herdabilidade (0,10 a 0,15 – Ribeirão Branco e 0,36 a 0,48 – Ponta Grossa) mostraram baixa influência do ambiente na variação fenotípica, o que é importante para a predição do ganho genético mediante a seleção e confirmam potencial genético em ambos os locais, especialmente Ponta Grossa. O efeito da interação genótipo x ambiente é simples. As progênies plantadas em um local poderão também ser plantadas no outro. Dentre essas as C-197, C-189-1, C-084-2 e C-032-2 são indicadas para plantações tanto na região estudada do estado de São Paulo quanto do Paraná. Apesar de um número maior de progênies em Ribeirão Branco, constatou-se o mesmo número de agrupamentos de progênies pelo método UPGMA e de otimização de Tocher em ambos os testes. Existe diversidade genética entre as progênies de P. elliottii. Para programas de melhoramento, recomenda-se o cruzamento entre progênies de grupos divergentes para aumentar a variação genética, e consequentemente, o ganho genético nas gerações subsequentes, sem esquecer de se levar em consideração a performance do caráter de interesse. O objetivo do trabalho em P. radiata foi relacionar os resultados de características da madeira obtidas a partir de dois métodos Pilodyn e SilviScan visando validar uma metodologia eficiente para fenotipagem de um maior número de amostras. Um teste com 30 progênies de P. radiata foi estabelecido em Flynn na Austrália. As características avaliadas foram densidade da madeira, o ângulo microfibrilar e o módulo de elasticidade. A correlação genética e fenotípica entre os caracteres da madeira obtidas a partir dos dois métodos e a herdabilidade individual no sentido restrito foram estimadas. Os dados de Pilodyn apresentaram alta herdabilidade e alta correlação genética e fenotípica entre densidade de madeira e moderada com ângulo microfibrilar e módulo de elasticidade. Os resultados confirmam que o Pylodyn é um efetivo método indireto e rápido para avaliação de parâmetros genéticos para caracteres de qualidade madeira em P. radiata.
Exotic forest species have been introduced in Brazil in order to promote improvements in socioeconomic development and help to reduce the pressure caused to native forests. With growing demand for these species, research on genetic improvement has increased to find new, more productive germplasm and preferably in less time. Two species were used in the study: slash pine (Pinus elliottii Engelm. var. elliottii) and radiata pine (Pinus radiata D. Don). The first part of the study had the purpose to identify the stability, adaptability, productivity and genetic parameters, in addition to selection gain and genetic divergence in slash pine open pollinated second generation progenies considering phenotypic trait. Two tests were established, one in Ponta Grossa-PR with 24 progenies and one in Ribeirão Branco-SP with 44 progenies, both in Brazil, to identify the most productive genotypes for commercial planting areas in both sites. There was significant variation (p<0.01) among progenies for growth and form traits. The high coefficients of genetic variation for wood volume (14.31% to 16.24% - Ribeirão Branco-SP and 31.78% to 33.77% - Ponta Grossa-PR) and heritability (0.10 to 0.15 – Ribeirão Branco-SP and 0.36 to 0.48 – Ponta Grossa-PR) have shown low environmental influence on phenotypic variation, which is important for the prediction of genetic gain by selecting and confirming genetic potential in both places, especially Ponta Grossa. The effect of genotype x environment interaction is simple. Progenies planted in one site can also be planted in the other. Among these C-197, C-189-1, C-084-2 and C-032-2 progenies are suitable for plantations in both studied region of São Paulo and Paraná. Although larger number of progenies in Ribeirão Branco, it was found the same number of clusters through UPGMA and Tocher methods in both tests. There is genetic diversity among slash pine progenies. For breeding programs, it is recommended to cross progenies between different groups to increase genetic variation, and consequently the genetic gain in subsequent generations, not forgetting to take into account the performance of interest trait. The objective of the study in Radiata pine was relate wood quality traits obtained from two methods Pilodyn and SilviScan to validate an efficient phenotyping methodology for a greater number of samples. A test with 30 progenies of Radiata pine was established in Flynn Australia. The evaluated traits were wood density, microfibril ange and modulus of elasticity. Genetic and phenotypic correlation between traits of wood quality obtained from two methods and narrow-sense individual heritability were estimated. The Pilodyn data showed high heritability and high genetic and phenotypic correlation between wood density and moderate with microfibril angle and modulus of elasticity. The results confirm that the Pylodyn is an effective indirect and rapid method for evaluation of genetic parameters for wood quality traits in Radiata pine.
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Herritsch, Alfred. "Investigations on Wood Stability and Related Properties of Radiata Pine." Thesis, University of Canterbury. Chemical and Process Engineering, 2007. http://hdl.handle.net/10092/1203.
Full textAbstract:
Previous studies on wood instability have identified some wood basic properties which influence the timber distortion and shape changes while the wood is losing or gaining moisture. These properties include wood anisotropic shrinkage, equilibrium moisture content (EMC) in both desorption and adsorption, fibre saturation point (FSP) and water diffusion coefficient. This study investigated the stability related wood properties and their variations within the stems of the New Zealand grown radiata pine trees. The basic density, EMC and shrinkage for the earlywood and the latewood were also experimentally determined. In taking into account these properties and their variations, an analytical model was developed to simulate the wood distortion. The equilibrium moisture content was determined at 30°C and humidity range from 27% to 90%. It was found that the EMC difference between the earlywood and the latewood was negligible. The experimental results also show that the EMC decreases from pith towards the bark over the disc cross section and the trend is most obvious at high humidities (70-90%). Along the tree height, the EMC decreases from ground towards the top of the stem. The tangential shrinkage results were highly variable but, in general, the latewood has higher values than the earlywood. The opposite trend was found for the longitudinal shrinkage, higher values for the earlywood than the latewood. In the tree height direction, the tangential shrinkage was found to decrease with the tree height. This follows the same trend as the microfibril angle which in general also decreases with the tree height. The fibre saturation point (FSP) was determined from the tangential shrinkage values at different equilibrium moisture contents. These were taken as the intersection point of the tangential shrinkage line with the moisture content axis. The experimental results have revealed a trend that the FSP decreases from the pith towards the bark and also decreases with the tree height. Similar behaviour was found for the tangential and longitudinal swelling during the adsorption. The moisture transport within radiata pine was investigated based on the diffusion theory under transient and isothermal condition of 30°C. The moisture dependant diffusion coefficient was derived from the experimental data using the inverse analysis method. The surface emission coefficient was determined by taking into account the variable surface moisture content, wood density and the ambient conditions. In the experiments, 138 samples in total (46 samples for each XIV of the longitudinal, tangential and radial directions) were used and their diffusion coefficients were determined for both the adsorption and the desorption with moisture content ranging from 6% to 22%. The derived diffusion coefficients are comparable with the reported data in the literature. Further investigation of the wood type influence on the diffusion coefficient revealed that compression wood has the lowest diffusion coefficients in the three directions (longitudinal, tangential and radial) both in the desorption and in the adsorption. In addition, the moisture content has the least influence on the diffusion coefficient in the compression wood. Investigation on the effects of the wood density has shown that in general, the diffusion coefficient decreases with increasing wood density although the correlations are only significant for the longitudinal direction in desorption. An analytical model for the simulation of the wood twist was developed which is based on the geometry and geometrical changes of the grains aligning non parallel to the pith. A board consists of numerous such grains which change the length and shape with moisture content change. The model predictions confirm that the grain angle, the tangential and longitudinal shrinkage and the conical angle all affect the development of the board twist. However, the discrepancies between the model prediction and the experimental data are significant, partly due to the experimental uncertainties and partly due to the model errors. In this study, sound velocity in the longitudinal direction was measured for the test samples used in the shrinkage experiments. The results revealed that the correlations between the sound velocity and the volumetric shrinkage at oven dry are significant. Based on this finding, the relationship between the tangential shrinkage and the radial shrinkage, the tangential shrinkage can be predicted from the sound velocity measurements. As the tangential shrinkage has significant influence on the wood distortion, this method can be used to segregate logs which may be prone to wood distortion.
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Xu, Ping. "The mechanical properties and stability of radiata pine structural timber." Thesis, University of Canterbury. Forestry, 2000. http://hdl.handle.net/10092/7497.
Full textAbstract:
Investigating stiffness, strength and stability in radiata pine structural timber is significant to the civil engineering, forestry industry and genetic selection in New Zealand due to the following reasons:
1. Radiata pine provides about 90% structural timber for industry and is one of the major incomes of the forestry industry in New Zealand.
2. Stiffness, strength and stability are major quality criteria of structural timber.
3. Radiata pine stem has large proportion of corewood that tends to be low in stiffness, strength and stability.
This study first presents the maps of average stiffness, average strength and average warp in radiata pine structural timber, obtained from sixty-two 27-year old, unpruned radiata pine trees. From these maps, one can conclude that the butt logs are problem logs, because the butt logs displayed the lowest stiffness, as well as the maximum bow and spring within the stems. The stiffness and strength distributions were compared with the typical distribution of wood density, which reveals that the wood density alone does not reflect the mechanical properties of radiata pine structural timber, because: 1) the denser butt logs exhibited the lowest stiffness among all log types; 2) the butt logs were not the strongest logs compared with other log types.
Knots are found to be the most important factor weakening the mechanical properties and causing extra distortion in structural timber. 99% of the boards broke at a knot that is associated also with lower local stiffness. 70% of maximum bows and 40% of maximum springs occurred off the expected mid-span, which may be attributed to the deflections introduced by larger margin and edge knots.
In order to estimate the failure strength non-destructively, this study examined the failure features of the weakest point in detail, including the local stiffness at the failure zone, the failure pattern of knots and the failure frequency in relation to growth and features of knots. The results of this study reveal that non-destructive estimation of strength at the likely weakest point in structural timber is possible.
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Sharma, Rajesh kumar. "Comparison of development of radiata pine (Pinus radiata D. Don) clones in monoclonal and clonal mixture plots." Thesis, University of Canterbury. School of Forestry, 2008. http://hdl.handle.net/10092/1577.
Full textAbstract:
The development of radiata pine (Pinus radiata D. Don.) clones was compared in
monoclonal and clonal mixture plots planted in an experiment established at Dalethorpe,
Canterbury, New Zealand with ten radiata pine clones in September 1993. Clones were
deployed in a randomised complete block plot design with three replications. Each
replication contained ten treatments of monoclonal plots and one in which all the clones
were intimately mixed in equal proportions.
Clones significantly differed in initial morphologies, survival and stem slenderness.
Sturdiness and initial heights were found to be the best predictors of initial survivals. The
study revealed that mode of deployment did not affect overall productivity, but individual
clones exhibited significantly different productivities between modes of deployment. All
clones contributed similarly to overall productivity in the monoclonal mode of deployment,
whereas the contribution of clones in the clonal mixture mode of deployment was
disproportionate. A minority of the clones contributed a majority of overall productivity in
the clonal mixture mode of deployment.
The inclusion of competition index as an independent variable in a distance-dependent
individual tree diameter increment model explained a significant amount of variability in
diameter growth. The use of an inverse-squared distance to neighbouring plants in the
competition index provided a slightly superior fit to the data compared to one that
employed a simple inverse of distance. Addition of genotype information in the
competition index further improved the fit of the model. Clones experienced different
levels of competition in monoclonal and clonal mixture modes of deployment. Competition
in monoclonal plots remained uniform over time, whereas some clones experienced greater
competition in clonal mixture plots which led to greater variability in their tree sizes. This
study indicated that single tree plot progeny test selections and early selections may miss
out some good genotypes that can grow rapidly if deployed monoclonally.
Stand level modelling revealed that clones differed significantly in modeled yield patterns
and model asymptotes. Clones formed two distinct groups having significantly different
yield models. The study also demonstrated that models developed from an initial few
years’ data were biased indicators of their relative future performances.
Evaluation of effectiveness of the 3-PG hybrid model using parameter values obtained
from destructive sampling and species-specific values from different studies revealed that
it is possible to calibrate this model for simulating the productivity of clones, and
predictions from this model might inform clonal selections at different sites under differing
climatic conditions. Destructive sampling at age 5 years revealed that clones significantly
differed in foliage and stem biomass. The differences in productivities of clones were
mainly due to differences in biomass partitioning and specific leaf areas.
Clones significantly differed in dynamic wood stiffness, stem-slenderness, branch
diameter, branch index and branch angle at an initial stocking of 1250 stems/ha. Mode of
deployment affected stem slenderness, which is sometimes related to stiffness. Although
dynamic stiffness was correlated with stem slenderness and stem slenderness exhibited a
significant influence on stiffness, clones did not exhibit statistically significant differences
in dynamic stiffness. Increasing initial stocking from 833 stems/ha to 2500 stems/ha
resulted in a 56 % decrease in branch diameter and a 17 % increase in branch angle.
Trees in the monoclonal mode of deployment exhibited greater uniformity with respect to
tree size, stem-slenderness, and competition experienced by clones compared to those in
the clonal mixture mode of deployment. Susceptibility of one clone to Woolly aphid
suggested that greater risks were associated with large scale deployment of susceptible
clones in a monoclonal mode of deployment.
This study also indicated that if the plants were to be deployed in a monoclonal mode then
block plot selections would have greater potential to enhance productivity.
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Wang, Eric Yunxin. "Properties and Distortion of Douglas-fir with Comparison to Radiata Pine." Thesis, University of Canterbury. Chemical and Process Engineering, 2009. http://hdl.handle.net/10092/3556.
Full textAbstract:
The objectives of this study were to investigate stability related basic wood properties and to determine stability performance of New Zealand grown Douglas-fir and those of radiata pine wood. In this study, nine 60-year old Douglas-fir trees and thirteen 26-year old radiata pine trees were selected from forests in Canterbury region. From these trees, 36 discs of 200 mm thick (13 for Douglas-fir and 23 for radiata pine) and 388 boards with dimensions of 100mm x 50mm x 4.8m (210 fro Douglas-fir and 178 fr radiata pine) were prepared.
From the prepared discs, 515 specimens (204 for Douglas-fi and 211 for radiata pine) were prepared for green moisture content (MC) and basic density measurements, The same total number of 515 specimens (205 for Douglas-fir and 210 for radiata pine) were also prepared for shrinkage measurements. From the green MC specimens, green weight, volume and oven-dry weight were measured while for the shrinkage specimens, dimensions and weights were measured at equilibrium for nine humidity conditions. These data were used to analyse basic wood properties and moisture uptake characteristics for both Douglas-fir and radiata pine. Variation of shrinkage within a tree and between trees was also studied for both species. After this, selected specimens (36 for Doulas-fir and 36 for radiata pine) were further tested in water immersion for water repellence examination.
The 388 full size boards (100mmx50mmx4.8m) were used for studies on distortion and acoustic properties at a sawmill (Southland Timber Ltd.). Dimensions, weights and acoustic velocity were measured from each board before and after drying. These data were used to analyse distortion and strength characteristics for both Douglas-fir and radiata pine. Comparison of the relative stability of full sized Douglas-fir and radiata pine structural timber was investigated in this study.
The results from small sample study confirmed that Douglas-fir is much stronger, has lower longitudinal shrinkage and lower gradient in corewood which can be used to explain the better dimensional stability of Douglas-fir than radiate pine although there is significant variability in the shrinkage for both Douglas-fir and radiate pine. In water immersion tests, Douglas-fir has better water repellency property than radiata pine over 2000 hours period during water immersion.
Under the same commercial practice in sawing and kiln drying, it is clearly shown that Douglas-fir timbers were straighter with lower levels of distortion than radiata pine at similar final moisture content. It is also interesting to note that the final moisture content in a range of 13-18% for Douglas-fir did not have significant impact on timber distortion but a negative trend was observed for radiata pine with MC in a range of 9 -14%. Tree heights showed clear influence on twist for radiata pine timbers, but it was not clearly observed from Douglas-fir timbers. Corewood proportion is found to have negative impact on the timber distortion for both Douglas-fir and radiata pine. Douglas-fir timbers showed much higher average acoustic MOE value than radiata pine timbers at similar final moisture content.
Because of the various proportion of corewood, the shrinkage varied greatly along the stem height and along the disc radius direction for the two species. This variation caused the difference of distortion between corewood, outerwood and transition wood, but the difference between butt log, middle log and top log is inconsistent. Therefore, it is recommended that the corewood proportion to be a criterion for the timber pre-sorting.
Variation of stability performance between trees was also found to be significant for the two species, and methods need to be developed for log sorting as well to reduce the timber distortion degradation. Non-destructive testing method such as acoustic tool may be offered to be a new approach for sorting logs, but it is also necessary to be aware of the significant difference between species.
The outcome from this project includes better understanding of Douglas-fir for structural applications. The conclusion can be drawn that Douglas-fir has superior quality for its strength, durability and moisture resistance. Douglas-fir is also claimed to have uniform properties and thus to be more stable compared to radiata pine. Douglas-fir timbers showed much higher acoustic MOE value than radiate pine timbers as similar final moisture content.
Books on the topic "Radiata pine"
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Institute, New Zealand Forest Research. Radiata pine agroforestry. Rotorua: the Institute, 1989.
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Maclaren, J. P. Radiata pine growers' manual. Rotorua: New Zealand Forest Research Institute, 1993.
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Maclaren, J. P. Radiata pine growers' manual. Rotorua: New Zealand Forest Research Institute, 1993.
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Lewis, N. B. Management of radiata pine. Melbourne: Inkata Press, 1993.
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Burdon, Rowland, William Libby, and Alan Brown. Domestication of Radiata Pine. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65018-0.
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Emmingham, William H. Using knobcone x Monterey hybrid pine (KMX) in western Oregon. Corvallis, Or: Oregon State University Extension Service, 1989.
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Haslett, A. N. Drying radiata pine in New Zealand: Research and commercial aspects. Rotorua, N.Z: New Zealand Forest Research Institute, 1998.
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Cown, D. J. New Zealand pine and Douglas-fir: Suitability for processing. 2nd ed. Rotorua, N.Z: New Zealand Forest Research Institute, 1999.
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Cown, D. J. New Zealand pine and Douglas-fir: Suitability for processing. 2nd ed. Rotorua, N.Z: Forest Research, 1999.
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Workshop on Growing Radiata Pine from Cuttings (1986 Rotorua, N.Z.). Workshop on Growing Radiata Pine from Cuttings: Rotorua, 5-7 May 1986. Rotorua, N.Z: Ministry of Forestry, Forest Research Institute, 1988.
Find full textBook chapters on the topic "Radiata pine"
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Grant, Jan, Tracy Dale, and Pauline Cooper. "Pine (Pinus radiata)." In Agrobacterium Protocols Volume 2, 135–41. Totowa, NJ: Humana Press, 2006. http://dx.doi.org/10.1385/1-59745-131-2:135.
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Burdon, Rowland, William Libby, and Alan Brown. "Introduction." In Domestication of Radiata Pine, 1–13. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65018-0_1.
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Burdon, Rowland, William Libby, and Alan Brown. "Early History: 7,000,000 Years Ago to 1901 C.E." In Domestication of Radiata Pine, 15–69. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65018-0_2.
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Nairn, Beverley J. "Commercial micropropagation of radiata pine." In Micropropagation of Woody Plants, 383–94. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8116-5_23.
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Toro, Jorge, and Stanley P. Gessel. "Radiata pine plantations in Chile." In Planted Forests: Contributions to the Quest for Sustainable Societies, 393–404. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-2689-4_25.
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Greer, Dennis H., Mike I. Menzies, and Ian J. Warrington. "Cold Hardiness of Radiata Pine (Pinus radiata D. Don)." In Tree Physiology, 555–73. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9650-3_20.
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Hargreaves, C., and M. Menzies. "Organogenesis and Cryopreservation of Juvenile Radiata Pine." In Protocols for Micropropagation of Woody Trees and Fruits, 51–65. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6352-7_6.
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Gleed, J. A. "Development of Plantlings and Stecklings of Radiata Pine." In Clonal Forestry II, 149–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-84813-1_8.
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Lambert, Marcia J., John Turner, and Jim Knott. "Boron nutrition of radiata pine plantations in Australia." In Boron in Soils and Plants, 83–88. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5564-9_16.
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Sutton, William R. J. "The need for planted forests and the example of radiata pine." In Planted Forests: Contributions to the Quest for Sustainable Societies, 95–109. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-2689-4_8.
Full textConference papers on the topic "Radiata pine"
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Del Perugia, Barbara, Sean Krisanski, Mohammad Sadegh Taskhiri, and Paul Turner. "Below-canopy UAS photogrammetry for stem measurement in radiata pine plantation." In Remote Sensing for Agriculture, Ecosystems, and Hydrology, edited by Christopher M. Neale and Antonino Maltese. SPIE, 2018. http://dx.doi.org/10.1117/12.2325480.
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Bozo, Daniel, Rafael Rubilar, Yosselin Espinoza, Otavio Campoe, Rachel Cook, David Carter, and Timothy Albaugh. "Mid-Rotation Response of Soil Preparation Intensity and Timing of Weed Control on Radiata Pine." In IECF 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/iecf2022-13094.
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Poisson, Miguel Angel. "Damage of bark beetles on the establishment of radiata pine can be reduced through ethological control." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.115133.
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Fale, John E., Nelson J. Gernert, and John D. Cornwell. "Flexible Heat Pipe Radiator." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1998. http://dx.doi.org/10.4271/981682.
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Sarraf, David B., and Nelson J. Gernert. "Loop heat pipe radiator." In Space technology and applications international forum: 1st conference on commercial development of space; 1st conference on next generation launch systems; 2nd spacecraft thermal control symposium; 13th symposium on space nuclear power and propulsion. AIP, 1996. http://dx.doi.org/10.1063/1.50007.
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Gernert, Nelson J., David B. Sarraf, Richard J. Guenther, and Kathryn Miller Hurlbert/. "Composite material heat pipe radiator." In Space technology and applications international forum: 1st conference on commercial development of space; 1st conference on next generation launch systems; 2nd spacecraft thermal control symposium; 13th symposium on space nuclear power and propulsion. AIP, 1996. http://dx.doi.org/10.1063/1.50080.
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Funghi, Federico, and Paolo di Sisto. "Probabilistic Design of Radial Pins Constraint System in a Gas Turbine Annular Combustion Chamber." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75763.
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One of the possible constraint configuration of an annular combustion chamber in a gas turbine is by means of radial pins. Radial pins usually connect the outer turbine casing to the combustor dome and fix combustor axial and circumferential displacements while allowing combustor free radial deformation, under thermal loads. In the typical mounting scheme, radial pins are screwed on the outer casing and then inserted into dedicated housing holes on the dome. Because of this arrangement the force (introduced by mechanical, thermal and dynamic loads) reacted by each pin is inherently not deterministic since it depends on the actual gap between the pin itself and the housing bush on the dome, which, in turn, is not explicitly known, being a function of the overall tolerance stack up. The scope of this study was to develop a method to design the radial pins of NovaLT™16 (*) combustion chamber, applicable since the conceptual phase, using a probabilistic approach [7]. Actual pin-bush gap distribution is calculated from stack up analysis and then used as input for a numerical simulation which computes the distribution of the reaction force on each pin, as a function of number of pins, stiffness of the pin, gap between pin and bush. Two different arrangements have been considered: the classic scheme and the floating pin configuration. The new probabilistic design approach allowed to have a robust understanding of the force distribution within the whole set of pins, to compute the optimal combination of pin number, pin stiffness, and gap and ultimately to select the floating pin configuration as the one to be implemented in NovaLT16 combustor. Test results revealed pin contact distribution was in line with predictions.
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Gernert, Nelson J., and John E. Fale. "Unfurlable Space Based Heat Pipe Radiator." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1996. http://dx.doi.org/10.4271/961456.
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Anderson, William G. "High Temperature Titanium-Water Heat Pipe Radiator." In SPACE TECH.& APPLIC.INT.FORUM-STAIF 2006: 10th Conf Thermophys Applic Microgravity; 23rd Symp Space Nucl Pwr & Propulsion; 4th Conf Human/Robotic Tech & Nat'l Vision for Space Explor.; 4th Symp Space Coloniz.; 3rd Symp on New Frontiers & Future Concepts. AIP, 2006. http://dx.doi.org/10.1063/1.2169184.
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Anderson, William, David Sarraf, Scott Garner, and Jim Barth. "High Temperature Water-Titanium Heat Pipe Radiator." In 4th International Energy Conversion Engineering Conference and Exhibit (IECEC). Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-4146.
Full textReports on the topic "Radiata pine"
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Laws, Nathan. A Parabolic Equation Analysis of the Underwater Noise Radiated by Impact Pile Driving. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1083.
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