U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Journal Southern forests Remove constraint Journal: Southern forests Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

375  Search Results

« Previous | 1 - 50 of 375 |
Number of results to display per page

Search Results

1. Air layering and its potential in propagating Uapaca kirkiana: a fruit tree from the miombo woodland, Tanzania

Author:
PP Mwang'ingo; LL Lulandala
Source:
Southern forests 2011 v.73 no.2 pp. 67-71
ISSN:
2070-2639
Subject:
Uapaca kirkiana; air layering; biomass; cost effectiveness; deforestation; forests; fruit trees; indole butyric acid; nutritional status; rearing; rooting; roots; shoots; Tanzania
Abstract:
... The potential to propagate Uapaca kirkiana through air layering was investigated at Igumbilo forest, Tanzania. The objective was to determine the effect of time of setting air layers and use of indole-3-butyric acid (IBA) to promote rooting. Air layers were initiated on young shoots, 1-to 2-years old, growing on mature trees. After root initiation, they were detached, potted and reared at the nurs ...
DOI:
10.2989/20702620.2011.610875

2. Biomass harvesting in Eucalyptus plantations in Western Australia

Author:
M R Ghaffariyan; M Brown; M Acuna; J Sessions; M Kuehmaier; J Wiedemann
Source:
Southern forests 2011 v.73 no.3-4 pp. 149-154
ISSN:
2070-2639
Subject:
Eucalyptus; biomass production; energy; fellers; forests; harvesting; harvesting equipment; plantations; regression analysis; trucks; Western Australia
Abstract:
... Australia is at an early stage of exploring the use of forest biomass to generate energy. This study evaluated the biomass yield and the productivity rates of equipment for harvesting biomass in a poor-quality eucalypt plantation. The operation consisted of a tracked feller-buncher, grapple skidder and mobile chipper. Time study methods were used to measure the harvesting operation. A multiple reg ...
DOI:
10.2989/20702620.2011.639491

3. Biomass production and carbon storage of Populus ×canadensis Guinier I-214 plantations grown at Pogradeci region in Albania

Author:
E Toromani; M Sanxhaku; M Sallaku; E Shaho
Source:
Southern forests 2011 v.73 no.2 pp. 91-99
ISSN:
2070-2639
Subject:
Populus; analysis of variance; biomass production; carbon; carbon sequestration; equations; linear models; plantations; planting; tree and stand measurements; trees; water content; Albania
Abstract:
... Fast-growing plantations of Populus ×canadensis Moench (syn. P. ×euramericana (Dode) Guinier ex Piccarolo) clone I-214 have good potential for biomass production. The objective of the study was estimation of biomass using allometric equations and estimation of carbon allocation according to tree components. The study was carried out in five poplar stands (total area 16.9 ha) in the Pogradeci regio ...
DOI:
10.2989/20702620.2011.610877

4. Cant sawing log positioning in a sawmill: searching for an optimal solution

Author:
CB Wessels; J de V du Plessis; NH Smit
Source:
Southern forests 2011 v.73 no.1 pp. 15-22
ISSN:
2070-2639
Subject:
algorithms; sawing; sawmills
Abstract:
... Automated three-dimensional log scanning and positioning systems in a sawmill have a limited time available to reach an optimal positioning solution before primary breakdown sawing starts. In this study a search algorithm (tentacle algorithm) was developed for this task and was empirically evaluated in terms of its ability to find an optimal or close-to-optimal positioning solution in a limited nu ...
DOI:
10.2989/20702620.2011.576486

5. Critical water stress levels in Pinus patula seedlings and their relation to measures of seedling morphology

Author:
CA Rolando; NW Pammenter; KM Little
Source:
Southern forests 2011 v.73 no.1 pp. 41-49
ISSN:
2070-2639
Subject:
Pinus patula; environmental factors; mortality; plant available water; planting; root growth; roots; seedlings; shoots; soil air; stomatal conductance; stomatal movement; temperature; water potential; water stress
Abstract:
... A pot trial was implemented to determine the effect of soil water stress following transplanting on shoot water potential and stomatal conductance of Pinus patula seedlings. The relationship of seedling morphology to measures of water stress was also investigated. The trial consisted of two watering treatments: a control (no water stress) and a severe water stress (no further water after planting) ...
DOI:
10.2989/20702620.2011.576481

6. Excavator-based processor operator productivity and cost analysis in Zululand, South Africa

Author:
G Hogg; R Pulkki; P Ackerman
Source:
Southern forests 2011 v.73 no.2 pp. 109-115
ISSN:
2070-2639
Subject:
Eucalyptus grandis; case studies; coastal plains; cost analysis; equipment; harvesting; mechanization; pulpwood; temporal variation; trees; South Africa
Abstract:
... Operator impact on productivity and cost using similar processor machines was addressed in this case study. The study had two objectives: (1) determine the extent of operator productivity variation between six processor operators in a harvesting operation; and (2) determine potential cost implications associated with operator productivity variation. The study was carried out on the Zululand coasta ...
DOI:
10.2989/20702620.2011.610874

7. Final results from a trial to test the effect of plot size on Eucalyptus hybrid clonal ranking in coastal Zululand, South Africa

Author:
T K Stanger; G M Galloway; E CL Retief
Source:
Southern forests 2011 v.73 no.3-4 pp. 131-135
ISSN:
2070-2639
Subject:
Eucalyptus grandis; clones; genotype; hybrids; prediction; subtropics; trees; uncertainty; South Africa
Abstract:
... Hybrid clones with Eucalyptus grandis as one parent and, generally, E. urophylla as the other parent, are deployed commercially as monoclonal blocks by Sappi in the subtropical region of coastal Zululand, South Africa. In monoclonal blocks genotypes are grown in self-competition. Performance under this scenario may not necessarily correlate well with performance where genotypes are competing for r ...
DOI:
10.2989/20702620.2011.639492

8. Growth and yield models for Eucalyptus grandis grown in Swaziland

Author:
M du Plessis; H Kotze
Source:
Southern forests 2011 v.73 no.2 pp. 81-89
ISSN:
2070-2639
Subject:
pulpwood; models; stand density; trees; planting; forest growth; Eucalyptus grandis; stand basal area; Eswatini
Abstract:
... The aim of this study was to develop a stand-level growth and yield model for short-rotation Eucalyptus grandis grown for pulp wood production at Piggs Peak in Swaziland. The data were derived from a Nelder 1a spacing trial established with E. grandis clonal cuttings in 1998 and terminated in 2005. Planting density ranged from almost free-growing trees established at 161 trees ha⁻¹ to extremely de ...
DOI:
10.2989/20702620.2011.610873

9. Improving harvester estimates of bark thickness for radiata pine (Pinus radiata D.Don)

Author:
M Strandgard; D Walsh
Source:
Southern forests 2011 v.73 no.2 pp. 101-108
ISSN:
2070-2639
Subject:
Pinus radiata; Pinus sylvestris; bark; data collection; harvesters; models; prediction; tree and stand measurements; trees
Abstract:
... Harvesters estimate bark thickness primarily from diameter over bark (DOB) and use it to estimate log volume and value. Harvester bark thickness estimation errors can reduce returns through poor bucking optimisation and out-of-specification logs. Radiata pine bark thickness data from harvested logs and permanent sample plots (PSP) were analysed to determine best-fit coefficients for current and po ...
DOI:
10.2989/20702620.2011.610876

10. Lasiodiplodia species associated with dying Euphorbia ingens in South Africa

Author:
J A van der Linde; D L Six; M J Wingfield; J Roux
Source:
Southern forests 2011 v.73 no.3-4 pp. 165-173
ISSN:
2070-2639
Subject:
Botryosphaeriaceae; DNA; Euphorbia; death; fungi; genes; internal transcribed spacers; pathogenicity; pathogens; trees; South Africa
Abstract:
... Various species of Euphorbia occur in South Africa, including herbaceous, succulent and woody types. The largest of the succulent Euphorbia spp. in South Africa is Euphorbia ingens. These trees have been dying at an alarming rate in the Limpopo province during the course of the last 15 years. Investigations into the possible causes of the death have included the possible role of fungal pathogens. ...
DOI:
10.2989/20702620.2011.639499

11. Low genetic diversity and high genetic differentiation among severely fragmented populations of the critically endangered tree Talbotiella gentii (Fabaceae)

Author:
D Dompreh; MD Swaine; A Price
Source:
Southern forests 2011 v.73 no.2 pp. 73-80
ISSN:
2070-2639
Subject:
DNA; Talbotiella; correspondence analysis; extinction; gene flow; genetic drift; genetic variation; inbreeding; indigenous species; provenance; random amplified polymorphic DNA technique; trees; Ghana
Abstract:
... The genetic diversity among 17 populations (including 10 newly discovered) of Talbotiella gentii (Fabaceae, Caesalpinioideae), a rare tree species endemic to Ghana, was assessed using random amplified polymorphic DNA (RAPD). A total of 80 polymorphic bands were generated from eight primers and analysed by cluster and correspondence analysis. This showed a clear distinction between populations, wit ...
DOI:
10.2989/20702620.2011.610778

12. Measurement of cellulose content, Kraft pulp yield and basic density in eucalypt woodmeal using multisite and multispecies near infra-red spectroscopic calibrations

Author:
G M Downes; R Meder; H Bond; N Ebdon; C Hicks; C Harwood
Source:
Southern forests 2011 v.73 no.3-4 pp. 181-186
ISSN:
2070-2639
Subject:
Eucalyptus; cellulose; data collection; kraft pulp; prediction; spectroscopy; variance; wood; wood chips; wood density
Abstract:
... Previous descriptions of multisite and multispecies near infra-red (NIR) spectroscopic calibrations for predicting cellulose content (CC) and Kraft pulp yield (KPY) in eucalypt woodmeal demonstrated that large, single calibrations provide precise predictions for a wide range of sites and species. These have since been used in a range of published studies. Their value lies in low-cost, fast analyti ...
DOI:
10.2989/20702620.2011.639489

13. Nutrient fluxes in rainfall, throughfall and stemflow in Eucalyptus stands on the Zululand coastal plain, South Africa

Author:
S B Dovey; B du Toit; W de Clercq
Source:
Southern forests 2011 v.73 no.3-4 pp. 193-206
ISSN:
2070-2639
Subject:
Eucalyptus; calcium; canopy; cation exchange; coastal plains; drainage; dry deposition; forest plantations; harvesting; magnesium; nitrogen; nitrogen content; nutrients; potassium; rain; stemflow; throughfall; trees; South Africa
Abstract:
... Atmospheric deposition was assessed at two sites over a four-year period in post-canopy-closure (mature) Eucalyptus stands in the northern Dukuduku and southern KwaMbonambi commercial plantation forestry areas of Zululand, South Africa. The aim of this study was to determine the magnitude and relevance of nutrient addition with rainfall, throughfall and stemflow to commercial forestry in this regi ...
DOI:
10.2989/20702620.2011.639506

14. Pruning quality affects infection of Acacia mangium and A. crassicarpa by Ceratocystis acaciivora and Lasiodiplodia theobromae

Author:
M Tarigan; M J Wingfield; M van Wyk; B Tjahjono; J Roux
Source:
Southern forests 2011 v.73 no.3-4 pp. 187-191
ISSN:
2070-2639
Subject:
Acacia mangium; Ceratocystis; bark; biological resistance; fungi; pathogens; plantations; pruning; stems; trees; Indonesia
Abstract:
... Pruning (singling) is a common silvicultural practice in commercial Acacia plantations because these trees tend to have multiple stems. The wounds resulting from pruning are susceptible to infection by pathogens. Ceratocystis acaciivora and Lasiodiplodia theobromae have been shown recently to be important pathogens of A. mangium in Indonesia, where they are commonly associated with wounds on trees ...
DOI:
10.2989/20702620.2011.639498

15. Variation in seed rain from Widdringtonia whytei growing in different conditions on Mulanje Mountain in Malawi

Author:
T F Chanyenga; C J Geldenhuys; J Harvey
Source:
Southern forests 2011 v.73 no.3-4 pp. 123-129
ISSN:
2070-2639
Subject:
forest litter; forests; habitat fragmentation; habitats; landscapes; seed dispersal; seed trees; seeds; Malawi
Abstract:
... Mulanje Mountain is one of the examples of tropical montane landscapes with plant populations varying in size from small fragments of less than 1 ha to riverine strips and stands of more than 100 ha. Seed availability is a potential limiting factor in vegetation recovery in such landscapes. Field observation on seed rain and seed limitation was conducted in 2008 and 2009 in three sizes of forest f ...
DOI:
10.2989/20702620.2011.639484

16. Vermicompost leachate improves seedling emergence and vigour of aged seeds of commercially grown Eucalyptus species

Author:
LS Kandari; MG Kulkarni; J van Staden
Source:
Southern forests 2011 v.73 no.2 pp. 117-122
ISSN:
2070-2639
Subject:
Eucalyptus; earthworms; fertilizers; growth performance; microorganisms; nutrients; organic matter; plant growth substances; seedling emergence; seedlings; seeds; sowing; vigor
Abstract:
... Vermicompost leachate (VCL) is a liquid generated by earthworms and microorganisms during the conversion of organic matter into vermicompost. Vermicompost leachate is rich in nutrients and believed to contain both known and unknown plant growth substances, which are beneficial to plants. Four-year-old seeds (artificially aged) of Eucalyptus dunnii, E. nitens and E. smithii were subjected to VCL at ...
DOI:
10.2989/20702620.2011.610923

17. A comparison of collinearity mitigation techniques used in predicting BLUP breeding values and genetic gains over generations

Author:
K A Eatwell; S D Verryn; C Z Roux; P JM Geerthsen
Source:
Southern forests 2011 v.73 no.3-4 pp. 155-163
ISSN:
2070-2639
Subject:
Eucalyptus grandis; Pinus patula; breeding value; genetic improvement; parents; prediction; progeny; tree breeding
Abstract:
... Collinearity potentially has a negative impact on the prediction of genetic gains in tree breeding programs. This study investigated the reliability and impact of best linear unbiased prediction (BLUP) using various collinearity mitigation techniques and of two computational numerical precisions on the genetic gains in breeding populations. Multiple-trait, multiple-trial BLUP selection scenarios w ...
DOI:
10.2989/20702620.2011.639490

18. The effect of anthropogenic disturbances on population structure and regeneration of Scorodophloeus fischeri and Manilkara sulcata in coastal forests of Tanzania

Author:
C Mligo; HVM Lyaruu; HJ Ndangalasi
Source:
Southern forests 2011 v.73 no.1 pp. 33-40
ISSN:
2070-2639
Subject:
Manilkara; Scorodophloeus; anthropogenic activities; coastal forests; hardwood; humans; indigenous species; natural regeneration; plant communities; population structure; seedlings; threatened species; tree and stand measurements; trees; Tanzania
Abstract:
... Scorodophloeus fischeri (Fabaceae, subfamily Caesalpinoideae) and Manilkara sulcata (Sapotaceae) are examples of tropical African hardwood species and are endemic to East African coastal forests. These plant species are threatened by human activities beyond natural recovery in some forests. This study aimed to assess the effects of anthropogenic disturbance on the natural regeneration potential of ...
DOI:
10.2989/20702620.2011.574830

19. The flexural properties of young Pinus elliottii x Pinus caribaea var. hondurensis timber from the Southern Cape and their prediction from acoustic measurements

Author:
C B Wessels; G P Dowse; H C Smit
Source:
Southern forests 2011 v.73 no.3-4 pp. 137-147
ISSN:
2070-2639
Subject:
Pinus caribaea var. hondurensis; Pinus elliottii; acoustics; bending strength; lumber; prediction; trees; South Africa
Abstract:
... The objectives of this study were to determine the bending strength and stiffness properties of young Pinus elliottii x P. caribaea var. hondurensis timber from the Southern Cape, South Africa, and to evaluate the predictability of these properties from acoustic measurements on standing trees, logs and their sawn boards. The timber has good bending strength (MOR) properties but the mean stiffness ...
DOI:
10.2989/20702620.2011.640427

20. The pitch canker fungus, Fusarium circinatum: implications for South African forestry

Author:
RG Mitchell; ET Steenkamp; TA Coutinho; MJ Wingfield
Source:
Southern forests 2011 v.73 no.1 pp. 1-13
ISSN:
2070-2639
Subject:
Fusarium circinatum; Pinus patula; disease outbreaks; forestry; fungi; mortality; pathogens; plantations; planting; seedlings; softwood; South Africa
Abstract:
... Fusarium circinatum, the causal agent of pitch canker of mature pines and root/collar rot of pine seedlings/cuttings, has resulted in large-scale losses to pine forestry in various parts of the world. The disease caused by this fungus is now regarded as one of the most important threats to pine plantations by a pathogen. Fusarium circinatum was first discovered in South Africa in 1990 where it inf ...
DOI:
10.2989/20702620.2011.574828

21. The potential of remote sensing technology for the detection and mapping of Thaumastocoris peregrinus in plantation forests

Author:
Z Oumar; O Mutanga
Source:
Southern forests 2011 v.73 no.1 pp. 23-31
ISSN:
2070-2639
Subject:
Eucalyptus; canopy; color; death; forest damage; forest plantations; forest yields; forests; insects; leaves; monitoring; remote sensing; scanners; trees
Abstract:
... Thaumastocoris peregrinus is a sap-sucking insect that feeds on eucalyptus leaves. It poses a major threat to the forest sector by reducing the photosynthetic ability of the tree, resulting in stunted growth and even death of severely infested trees. The foliage of the tree infested with T. peregrinus is usually seen to turn a reddish brown colour starting at the northern side of the canopy but pr ...
DOI:
10.2989/20702620.2011.574814

22. A single dominant Ganoderma species is responsible for root rot of Acacia mangium and Eucalyptus in Sumatra

Author:
M PA Coetzee; B D Wingfield; G D Golani; B Tjahjono; A Gafur; M J Wingfield
Source:
Southern forests 2011 v.73 no.3-4 pp. 175-180
ISSN:
2070-2639
Subject:
Acacia mangium; Eucalyptus; Ganoderma; fruiting; fruiting bodies; pathogens; phylogeny; plantations; root rot; roots; trees; Indonesia
Abstract:
... Ganoderma root rot is the most serious disease affecting commercially planted Acacia mangium in plantations in Indonesia. Numerous Ganoderma spp. have been recorded from diseased trees of this species and to a lesser extent Eucalyptus, causing confusion regarding the primary cause of the disease. In this study, a large collection of Ganoderma isolates were obtained from the roots of A. mangium sho ...
DOI:
10.2989/20702620.2011.639488

23. A stratification of the South African forestry landscape based on climatic parameters

Author:
JH Louw; I Germishuizen; CW Smith
Source:
Southern forests 2011 v.73 no.1 pp. 51-62
ISSN:
2070-2639
Subject:
analysis of variance; case studies; climatic factors; databases; decision making; forestry; forests; landscape ecology; landscapes; models; plant physiology; plantations; prediction; risk management; soil surveys; temperature; South Africa
Abstract:
... The benefits of high-resolution forest site classification systems have been widely acknowledged in South Africa as a prerequisite for decision-making in forestry management. Although substantial research and development work have been done on categorising and mapping the soil and geological environment, surprisingly little has been done to improve our understanding of the role of climate in plant ...
DOI:
10.2989/20702620.2011.574825

24. Can early thinning and pruning lessen the impact of pine plantations on beetle and ant diversity in the Patagonian steppe?

Author:
JC Corley; JM Villacide; M Vesterinen
Source:
Southern forests 2012 v.74 no.3 pp. 195-202
ISSN:
2070-2639
Subject:
Coleoptera; Pinus; arid zones; canopy; grazing; habitats; insects; pitfall traps; plantations; pruning; sheep; species diversity; steppes; vegetation cover; Argentina
Abstract:
... Pine plantations are thought to negatively impact species diversity and to irreversibly modify arid zones. However, some studies have suggested that through the application of appropriate management practices, the negative impacts of plantations may be reduced. Our aim was to study the effects of early pruning and thinning on the ground-dwelling insects found in pine tree plantations in Patagonia. ...
DOI:
10.2989/20702620.2012.722837

25. Coarse root–shoot allometry of Pinus radiata modified by site conditions in the Western Cape province of South Africa

Author:
H Pretzsch; P Biber; E Uhl; P Hense
Source:
Southern forests 2012 v.74 no.4 pp. 237-246
ISSN:
2070-2639
Subject:
Pinus pinaster; Pinus radiata; adults; allometry; carbon sequestration; dendrochronology; ecosystems; fine roots; forests; growth rings; models; mortality; root growth; shoots; water stress; South Africa
Abstract:
... The relationship between root and shoot growth and how it is modified by chronic or episodic drought stress is so far not well understood. Allometric partitioning theory (APT) supposes a constant root–shoot allometry. Optimal partitioning theory (OPT) assumes that plants’ root growth is enhanced under water limitation. However, recent studies show that fine and coarse roots react differently. This ...
DOI:
10.2989/20702620.2012.741794

26. Comparing normal, lognormal and Weibull distributions for fitting diameter data from Akashmoni plantations in the north-eastern region of Bangladesh

Author:
I Kayes; JC Deb; P Comeau; S Das
Source:
Southern forests 2012 v.74 no.3 pp. 175-181
ISSN:
2070-2639
Subject:
Acacia auriculiformis; plantations; probability; stand structure; tree and stand measurements; Bangladesh
Abstract:
... Statistical probability density functions are widely used to model tree diameter distributions and to describe stand structure. The objective of this study was to compare the performance of normal, logarithmic-normal and three-parameter Weibull distributions for fitting diameter data from Akashmoni (Acacia auriculiformis A. Cunn. ex Benth.) plantations grown in the north-eastern region of Banglade ...
DOI:
10.2989/20702620.2012.717409

27. Comparisons between laboratory and field results of frost tolerance of pines from the southern USA and Mesoamerica planted as exotics

Author:
GR Hodge; WS Dvorak; ME Tighe
Source:
Southern forests 2012 v.74 no.1 pp. 7-17
ISSN:
2070-2639
Subject:
Pinus caribaea var. hondurensis; autumn; climatic factors; electrolytes; freezing; frost resistance; genetic variation; growth chambers; hybrids; introduced species; latitude; photoperiod; planting; progeny; seedlings; temperature; trees; Brazil; Central America; Mexico; South Africa; United States
Abstract:
... An artificial freezing study was conducted with 14 pine species and varieties from Mexico and Central America, and the southern and western USA. The pines chosen represented major commercial plantation species in the Southern Hemisphere such as Pinus caribaea var. hondurensis, P. taeda (multiple sources), P. patula and P. radiata, as well as promising species such as P. greggii, P. maximinoi and P ...
DOI:
10.2989/20702620.2012.683637

28. Determining the effect of tree size, bark-wood bond strength and tree form on the productivity of an excavator-based harvester in Acacia mearnsii in the KwaZulu-Natal forestry region of South Africa

Author:
M Ramantswana; A McEwan; J Pauw
Source:
Southern forests 2012 v.74 no.3 pp. 151-157
ISSN:
2070-2639
Subject:
Acacia mearnsii; harvesting; tree and stand measurements; trees; South Africa
Abstract:
... The aim of this study was to determine the effect of tree size, bark-wood bond strength and tree form on the productivity of cut-to-length harvesting of Acacia mearnsii, using an excavator-based harvester with a SP Maskiner harvester head in the KwaZulu-Natal forestry region of South Africa. Tree diameter and height measurements were used to determine individual tree volumes, after which the trees ...
DOI:
10.2989/20702620.2012.722823

29. Development of site index curves for Pinus kesiya in the Philippines

Author:
RIC Lumbres; YJ Lee; YO Seo; FG Calora
Source:
Southern forests 2012 v.74 no.2 pp. 115-120
ISSN:
2070-2639
Subject:
Pinus kesiya; forests; growth models; managers; prediction; site index; Philippines
Abstract:
... This study was conducted to develop a height–age growth model and site index curves for site quality evaluation of old secondary-growth stands of Pinus kesiya in the northern Philippines. The Chapman-Richards growth function was used in the guide curve method to generate anamorphic site index curves for this species. In order to evaluate the developed model, coefficient of determination (R²), root ...
DOI:
10.2989/20702620.2012.701441

30. Establishment of a Nothofagus alessandrii plantation using different levels of shade and weed control methods in Talca province, central Chile

Author:
R Santelices; F Drake; RM Navarro-Cerrillo
Source:
Southern forests 2012 v.74 no.1 pp. 71-76
ISSN:
2070-2639
Subject:
Nothofagus; biomass; control methods; leaf area; leaves; mulching; netting; plantations; planting; plastics; seedlings; shade; weed control; Chile
Abstract:
... There is a lack of information regarding the establishment of Nothofagus alessandrii plantations, including any impacts that shading and weed control may have on early survival and growth. A trial was therefore initiated where four shade levels (0% and Rachel® plastic net of 50%, 65%, and 80%) and two weed control methods (chemical and mulching) were tested. Three years after establishment, signif ...
DOI:
10.2989/20702620.2012.686215

31. Evaluation of flooding tolerance in cuttings of Populus clones used for forestation at the Paraná River Delta, Argentina

Author:
VMC Luquez; FG Achinelli; S Cortizo
Source:
Southern forests 2012 v.74 no.1 pp. 61-70
ISSN:
2070-2639
Subject:
river deltas; stomatal conductance; greenhouses; parents; breeding; cluster analysis; electron transfer; adventitious roots; clones; leaf area; photosynthesis; soil; growth retardation; catfish; planting; Populus; flooding tolerance; leaves; container-grown plants; Argentina
Abstract:
... We analysed the responses to flooding of 14 poplar clones used for forestation at the Paraná River Delta, Argentina. Some are commercial clones planted in the area, and others belong to a poplar breeding program from the National Institute of Agricultural Technology (INTA) in Argentina. Potted plants of 60 cm high growing in a greenhouse were watered (control) or submerged in water 10 cm above soi ...
DOI:
10.2989/20702620.2012.686214

32. Fibre volume losses of eight softwood clearfell harvesting systems in South Africa

Author:
P Ackerman; R Pulkki
Source:
Southern forests 2012 v.74 no.2 pp. 133-149
ISSN:
2070-2639
Subject:
felling; harvesting; income; issues and policy; lumber; opportunity costs; softwood; stumps; trees; wood utilization; South Africa
Abstract:
... A study of both fibre volume loss and related opportunity cost was performed across the South African softwood sawtimber industry to gain information on the actual utilisation of useful fibre and potential loss or gain of opportunity in terms of potential revenue from both field practices and policy. The study quantified volume losses from high stumps, felling and crosscut saw kerf, log allowances ...
DOI:
10.2989/20702620.2012.701412

33. Future outlook for Pinus patula in South Africa in the presence of the pitch canker fungus (Fusarium circinatum)

Author:
RG Mitchell; TA Coutinho; E Steenkamp; M Herbert; MJ Wingfield
Source:
Southern forests 2012 v.74 no.4 pp. 203-210
ISSN:
2070-2639
Subject:
hybrids; nursery crops; Fusarium circinatum; Pinus patula; disease control; clones; crossing; softwood; trees; wood properties; planting; seed orchards; seedling production; temperature; cold tolerance; mortality; fungi; South Africa
Abstract:
... Approximately 50% of the area planted to softwood trees in South Africa has been established with Pinus patula, making it the most important pine species in the country. More effort has gone into developing this species for improved growth, tree form and wood properties than with any other species. This substantial investment has been threatened in the last 10 years by the pitch canker fungus, Fus ...
DOI:
10.2989/20702620.2012.741792

34. Genotypic variation in response to low boron in eucalypt clones

Author:
S Konsaeng; N Sritharathikhun; S Lordkaew; B Dell; B Rerkasem
Source:
Southern forests 2012 v.74 no.3 pp. 159-166
ISSN:
2070-2639
Subject:
Eucalyptus camaldulensis; adverse effects; boron; clones; genotype; nutrition; plant growth; plantations; planting; soil; tropics; wood; wood fibers
Abstract:
... Eucalypts are increasingly important in the tropics for meeting growing demand for timber, wood chips, paper pulp and biofuel. Many new plantations are planted on low boron (B) soils, with adverse effects on plant growth and productivity. Two experiments in sand culture with different levels of added B, from 0 to 10 μM B, examined the effect of B deficiency on growth, wood yield and morphology of ...
DOI:
10.2989/20702620.2012.717383

35. Growth potential and genetic parameters of four Mesoamerican pines planted in the Southern Hemisphere

Author:
GR Hodge; WS Dvorak
Source:
Southern forests 2012 v.74 no.1 pp. 27-49
ISSN:
2070-2639
Subject:
Pinus tecunumanii; genetic correlation; genetic improvement; genetic variation; growth traits; heritability; planting; progeny; provenance; tree and stand measurements; tree breeding; Brazil; Colombia; South Africa
Abstract:
... Summary results are reported from a total of 319 provenance/progeny tests of Pinus tecunumanii, P. maximinoi, P. patula and P. greggii that were established on sites in Brazil, Colombia and South Africa. Tests were measured for the growth traits height, diameter at breast height (DBH) and volume at ages 3, 5 and 8 years. At a particular age, correlations among height, DBH and volume were very high ...
DOI:
10.2989/20702620.2012.686192

36. Local community perception of joint forest management and its implications for forest condition: the case of Dambwa Forest Reserve in southern Zambia

Author:
M Phiri; PW Chirwa; S Watts; S Syampungani
Source:
Southern forests 2012 v.74 no.1 pp. 51-59
ISSN:
2070-2639
Subject:
Baikiaea plurijuga; Colophospermum mopane; Pterocarpus angolensis; burning; community service; forest management; forest reserves; forest trees; forests; harvesting; livelihood; natural regeneration; people; saplings; socioeconomic status; stems; Zambia
Abstract:
... This study conducted at Dambwa Forest Reserve in Livingstone, Zambia, evaluated the perception of local people about joint management of the forest reserve in the area and if there had been improvements to the livelihoods of the community and the ecological condition of the forest following joint forest management (JFM). Generally, more people (68%) participated in joint forestry management meetin ...
DOI:
10.2989/20702620.2012.686203

37. Low light availability affects leaf gas exchange, growth and survival of Euterpe edulis seedlings transplanted into the understory of an anthropic tropical rainforest

Author:
MLS dos Santos; S França; FP Gomes; JL do Nascimento; L dos Anjos Silva; MS Mielke
Source:
Southern forests 2012 v.74 no.3 pp. 167-174
ISSN:
2070-2639
Subject:
Euterpe edulis; agroforestry; biomass; canopy; carbon; gas exchange; leaf area; leaves; light intensity; microclimate; photosynthesis; planting; pruning; respiratory rate; seedlings; tree crown; trees; tropical rain forests; understory
Abstract:
... Euterpe edulis Mart. (Arecaceae) is a threatened palm tree of the Brazilian Atlantic Rainforest understory with fundamental importance for the restoration of degraded forest environments. We assessed the leaf gas exchange, growth and survival of E. edulis seedlings transplanted at three different forest sites (S1, S2 and S3) in the same area in which cocoa trees had been cultivated in a rustic agr ...
DOI:
10.2989/20702620.2012.722833

38. Machine productivity and residual harvesting residues associated with a cut-to-length harvest system in southern Tasmania

Author:
MR Ghaffariyan; J Sessions; M Brown
Source:
Southern forests 2012 v.74 no.4 pp. 229-235
ISSN:
2070-2639
Subject:
Pinus radiata; biomass; energy use and consumption; equipment; harvesting; logging; models; planning; plantations; prediction; pulp; stemwood; Tasmania
Abstract:
... The cut-to-length method is a preferred method for harvest of pine plantations in Australia. The cut-to-length method studied in southern Tasmania consists of a feller-buncher, processor, forwarder, grapple loader and tractortrailers that were producing only pulp logs for the plantation owner Norske Skog. An elemental time study method was applied to evaluate the productivity of the machines withi ...
DOI:
10.2989/20702620.2012.741770

39. Participatory forestry in Bangladesh: has it helped to increase the livelihoods of Sal forests-dependent people?

Author:
KK Islam; N Sato
Source:
Southern forests 2012 v.74 no.2 pp. 89-101
ISSN:
2070-2639
Subject:
capital; forestry; forests; livelihood; people; poverty; social capital; Bangladesh
Abstract:
... The government of Bangladesh has placed the utmost priority on participatory forestry (PF) since the 1980s, and this approach was commenced in the degraded Sal forest areas through a donor-funded project in 1989. These forest reforms aim to eliminate the main causes of forest depletion as well as alleviate poverty through the participation of local people, who depend on the forests for their livel ...
DOI:
10.2989/20702620.2012.701434

40. Performance of two Pinus patula hybrids in southern Africa

Author:
A Kanzler; K Payn; A Nel
Source:
Southern forests 2012 v.74 no.1 pp. 19-25
ISSN:
2070-2639
Subject:
Pinus patula; Pinus tecunumanii; drought tolerance; fungi; hybrids; planting; Southern Africa
Abstract:
... Two Pinus patula hybrids, P. greggii × P. patula and P. patula × P. tecunumanii, were planted across a number of sites in southern Africa. The growth and survival for each species/taxon was assessed at either 5 or 8 years of age at each site and compared to the respective parental species. Pinus greggii, as a pure species, has greater drought tolerance and is better adapted to harsher sites than P ...
DOI:
10.2989/20702620.2012.683639

41. Potential of Phytophthora pinifolia to spread via sawn green lumber: a preliminary investigation

Author:
R Ahumada; A Rotella; B Slippers; MJ Wingfield
Source:
Southern forests 2012 v.74 no.4 pp. 211-216
ISSN:
2070-2639
Subject:
Phytophthora; Pinus radiata; inoculum; lumber; pathogens; plantations; polymerase chain reaction; selective media; shoots; trees; wood; Chile
Abstract:
... Phytophthora pinifolia causes the needle and shoot disease of Pinus radiata in Chile known as Daño Foliar del Pino. Although P. pinifolia is primarily a needle pathogen, there are concerns that it might be spread to new environments via the export of contaminated timber. In order to determine whether P. pinifolia can enter or persist in green sawn lumber, its presence in lumber produced from trees ...
DOI:
10.2989/20702620.2012.717381

42. Response of Ocotea bullata, Curtisia dentata and Rapanea melanophloeos to medicinal bark stripping in the southern Cape, South Africa: implications for sustainable use

Author:
WJ Vermeulen; CJ Geldenhuys; KJ Esler
Source:
Southern forests 2012 v.74 no.3 pp. 183-193
ISSN:
2070-2639
Subject:
Ocotea; Rapanea; bark; forests; fungi; harvesting; insects; periderm; regrowth; summer; traditional medicine; tree classes; trees; winter; South Africa
Abstract:
... Tree bark is commonly used for traditional medicine in southern Africa and further afield. Increasing demand and commercialisation have resulted in the overexploitation of many species, posing a major challenge to forest managers to develop mechanisms for sustainable resource use. An experimental bark harvesting research project was initiated in the southern Cape, South Africa, to inform best prac ...
DOI:
10.2989/20702620.2012.717384

43. Selection of Corymbia citriodora for pulp productivity

Author:
JT Brawner; R Meder; M Dieters; DJ Lee
Source:
Southern forests 2012 v.74 no.2 pp. 121-131
ISSN:
2070-2639
Subject:
Corymbia citriodora; Eucalyptus; breeding; genetic correlation; genetic improvement; genotype-environment interaction; prediction; progeny; provenance; pulp; pulpwood; subtropics; wood density; Queensland
Abstract:
... Evaluation of a series of spotted gum (Corymbia citirodora) progeny trials, established in the subtropical region of Queensland, Australia, was undertaken to provide information for the development of advanced-generation breeding populations suitable for pulp production. Measurements of growth at two ages were combined with assessments of wood density and pulp yield from a selected sample of prove ...
DOI:
10.2989/20702620.2012.701418

44. Site quality assessment of a Pinus radiata plantation in Victoria, Australia, using LiDAR technology

Author:
Y Chen; X Zhu
Source:
Southern forests 2012 v.74 no.4 pp. 217-227
ISSN:
2070-2639
Subject:
Pinus radiata; canopy; equations; forests; lidar; models; plantations; site index; tree crown; trees; watersheds; Victoria (Australia)
Abstract:
... The aim of site quality assessment of Pinus radiata plantations is to determine the quality and productivity of the growing stock at different sites. It provides a useful indication of the site productivity to assist in the allocation of optimum thinning and fertiliser regimes and the scheduling of silvicultural operations. The predominant stand height (PDH) at a specific reference age, also known ...
DOI:
10.2989/20702620.2012.741767

45. Stem biomass and volume models of selected tropical tree species in West Africa

Author:
GHS Guendehou; A Lehtonen; M Moudachirou; R Mäkipää; B Sinsin
Source:
Southern forests 2012 v.74 no.2 pp. 77-88
ISSN:
2070-2639
Subject:
Afzelia africana; Anogeissus; Ceiba pentandra; Dialium; Diospyros; Tectona grandis; Verbenaceae; ash content; biomass production; carbon; carbon sequestration; carbon sinks; climate change; equations; forest resources; models; nitrogen; nondestructive methods; organic matter; plantations; prediction; rain forests; trees; tropical forests; wood density; Western Africa
Abstract:
... Estimating tree volume and biomass constitutes an essential part of the forest resources assessment and the evaluation of the climate change mitigation potential of forests through biomass accumulation and carbon sequestration. This research article provides stem volume and biomass equations applicable to five tree species, namely Afzelia africana Sm. (Caesalpiniaceae), Anogeissus leiocarpa (DC.) ...
DOI:
10.2989/20702620.2012.701432

46. Tolerance of Pinus patula full-sib families to Fusarium circinatum in a greenhouse study

Author:
RG Mitchell; MJ Wingfield; ET Steenkamp; TA Coutinho
Source:
Southern forests 2012 v.74 no.4 pp. 247-252
ISSN:
2070-2639
Subject:
Fusarium circinatum; Pinus patula; clones; fungi; greenhouses; mortality; open pollination; parents; pathogens; pollen; progeny; seedlings; trees; South Africa
Abstract:
... The pitch canker fungus, Fusarium circinatum, has caused large-scale mortality of young Pinus patula Schiede and Deppe ex Schltdl. and Cham. seedlings in nurseries in South Africa since 1990. Diseased seedlings have been inadvertently carried to the field, which in turn have died and has reduced stocking below an acceptable level. Tree breeders have suggested that the only long-term solution to li ...
DOI:
10.2989/20702620.2012.741788

47. An allometric equation for estimating stem biomass of Acacia auriculiformis in the north-eastern region of Bangladesh

Author:
Jiban Chandra Deb; Md. Abdul Halim; Enam Ahmed
Source:
Southern forests 2012 v.74 no.2 pp. 103-113
ISSN:
2070-2639
Subject:
Acacia auriculiformis; autocorrelation; biomass; carbon sinks; data collection; equations; forests; linear models; t-test; trees; Bangladesh
Abstract:
... Tree biomass plays an important role in sustainable management and in estimating forest carbon stocks. The objective of this study was to select the best model for measuring stem biomass of Acacia auriculiformis in the study area. Data from five hillocks and 120 individual trees from each hillock were used in this study. Twelve different forms of linear, power and exponential equations were compar ...
DOI:
10.2989/20702620.2012.701429

48. The strategic importance of applied tree conservation programs to the forest industry in South Africa

Author:
WS Dvorak
Source:
Southern forests 2012 v.74 no.1 pp. 1-6
ISSN:
2070-2639
Subject:
Eucalyptus; Fusarium circinatum; Pinus; alleles; climate change; conservation programs; forest industries; forest plantations; fungi; hybrids; insects; open pollination; parks; pest resistance; population size; seedlings; tree breeding; trees; Central America; Mexico; South Africa; South East Asia
Abstract:
... Because of anticipated adverse climatic change and resulting increases in disease and insect attacks in forest plantations in the future, forest industries must maintain broad genetic bases for adaptability and pest resistance. Since the early 1980s, the South African forest industry has obtained genetic material of 25 pine and eucalypt species that represent more than 4 200 trees from 260 natural ...
DOI:
10.2989/20702620.2012.683635

49. Confirmation of cytotype stability in autotetraploid black wattle (Acacia mearnsii) trees using flow cytometry and size differences of the reproductive gametes

Author:
Sascha L Beck-Pay
Source:
Southern forests 2013 v.75 no.1 pp. 1-6
ISSN:
2070-2639
Subject:
Acacia mearnsii; bark; colchicine; crossing; diploidy; field experimentation; flow cytometry; forest industries; germ cells; leaves; ovules; progeny; seed set; seeds; soaking; tetraploidy; trees; triploidy; South Africa
Abstract:
... Acacia mearnsii (black wattle) is grown commercially in South Africa for its timber and bark. However, the invasive nature of the species has resulted in it being considered an alien invader and for this reason research has been aimed at producing a sterile triploid variety that would be highly desirable for the South African commercial forestry industry. Tetraploids were successfully induced by s ...
DOI:
10.2989/20702620.2013.743763

50. Developing allometric equations for estimating leaf area and leaf biomass of Artocarpus chaplasha in Raghunandan Hill Reserve, Bangladesh

Author:
Swapan Kumar Sarker; Niamjit Das; Md Qumruzzaman Chowdhury; Md Mohasinul Haque
Source:
Southern forests 2013 v.75 no.1 pp. 51-57
ISSN:
2070-2639
Subject:
Artocarpus; biomass; carbon; data collection; equations; growth models; leaf area; leaves; linear models; prediction; t-test; tree and stand measurements; tree growth; trees; Bangladesh
Abstract:
... Estimation of leaf area (LA) and leaf biomass (LB) is important to understand plant physiological and carbon assimilation processes, and tree growth models. The aim of this study was to develop and compare allometric equations for predicting LA and LB of Artocarpus chaplasha Roxb. taking diameter at breast height (DBH) and tree height as predictors. Data of tree parameters were collected randomly ...
DOI:
10.2989/20702620.2013.773601