Effects of mass inoculation on induced oleoresin response in intensively managed loblolly pine

Abstract With mean annual increments up to 5.4 cords/ac/yr, six loblolly pine (Pinus taeda L.) research sites in Georgia produced yields on par with other results from intensively managed loblolly plantations around the world. Cultural treatments in the Georgia study include complete control of vegetation other than the planted pines with multiple applications of herbicide, annual fertilization, the combination of complete vegetation control and annual fertilization, and an intensive mechanical site preparation treatment. Complete vegetation control resulted in higher yield production at ages 10 to 12 yr than the intensive mechanical treatment at all locations. This regime also resulted in higher yield production than the annual fertilization treatment at four of six locations. Volume mean annual increment for 10- to 12-yr-old plantations with the combination treatment of complete vegetation control and annual fertilization ranged from 325 to 490 ft3/ac, growth rates comparable to those obtained at other high biomass production areas throughout the world. Our economic evaluation based on these results shows that 8 to 12% real rates of return are feasible from investments in intensive loblolly pine plantations in the southeastern United States. South. J. Appl. For. 25(2):69–74.

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Control of Low-Level Nantucket Pine Tip Moth Populations: A Cost-Benefit Analysis

Southern Journal of Applied Forestry ◽

10.1093/sjaf/30.4.182 ◽

2006 ◽

Vol 30 (4) ◽

pp. 182-187 ◽

Cited By ~ 2

Author(s):

Christopher Asaro ◽

Douglas R. Carter ◽

C. Wayne Berisford

Keyword(s):

Loblolly Pine ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Damage Threshold ◽

Primary Objective ◽

Volume Index ◽

Economic Damage ◽

Economic Injury Level ◽

Nantucket Pine Tip Moth ◽

Intensively Managed

Abstract The Nantucket pine tip moth, Rhyacionia frustrana, an important pest of intensively managed loblolly pine, can cause significant long-term volume loss in plantations. The primary objective of this study was to establish an economic damage threshold beyond which chemical control of this pest becomes cost-effective. Tip moth damage estimates were obtained from 200 trees for each generation over a 3-year period after planting on two sites in the Georgia Piedmont. A volume index (D2H) was obtained for each of these trees at the end of the study. Significant reductions in volume were observed among trees with relatively low damage levels (10–30% of shoots infested on average over a 3-year period) compared with those trees sprayed with insecticide throughout the study. Growth projection models were used to extrapolate 3-year volume differences among treatments to a full rotation. These and other parameters were used to calculate land expectation values and, subsequently, willingness to pay values for tip moth control at the beginning of the rotation using various discount rates. The results of this analysis suggest that an economic injury level for R. frustrana may be reached when damage levels, on average, exceed 30% infested shoots. South. J. Appl. For. 30(4):182–187.

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Whole-Tree Bark and Wood Properties of Loblolly Pine from Intensively Managed Plantations

Forest Science ◽

10.5849/forsci.12-030 ◽

2015 ◽

Vol 61 (1) ◽

pp. 55-66 ◽

Cited By ~ 9

Author(s):

Finto Antony ◽

Laurence R. Schimleck ◽

Richard F. Daniels ◽

Alexander Clark ◽

Bruce E. Borders ◽

...

Keyword(s):

Loblolly Pine ◽

Wood Properties ◽

Tree Bark ◽

Intensively Managed ◽

Whole Tree

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The Effect of Physiographic Region and Geographic Locale on Predicting the Dominant Height and Basal Area of Loblolly Pine Plantations

Southern Journal of Applied Forestry ◽

10.1093/sjaf/30.3.147 ◽

2006 ◽

Vol 30 (3) ◽

pp. 147-153 ◽

Cited By ~ 8

Author(s):

Ralph L. Amateis ◽

Stephen P. Prisley ◽

Harold E. Burkhart ◽

Jiping Liu

Keyword(s):

Loblolly Pine ◽

Geographic Location ◽

Basal Area ◽

Atlantic Coastal Plain ◽

Regression Equations ◽

Dominant Height ◽

Northern Latitudes ◽

Intensively Managed ◽

Highly Correlated ◽

Atlantic Coastal

Abstract Analysis of loblolly pine plantation permanent plot data established across the southeastern United States indicates that differences in dominant height and stand basal area may be related to geographic locale as well as physiographic region. In general, holding other factors constant,plantations at southern latitudes and eastern longitudes have less basal area than plantations at northern latitudes and western longitudes. Plantations at southern latitudes and eastern longitudes in the Atlantic Coastal Plain are generally taller than elsewhere in the Atlantic Coastal Plain.These trends were consistent for a younger population of intensively managed plantations, as well as for an older population of nonintensively managed plantations. Regression equations were developed to test the significance of geographic location on the prediction of basal area and dominantheight. Even in the presence of stand variables that are highly correlated with basal area and dominant height, latitude and longitude were highly significant predictors. Including them as predictor variables increased considerably the precision of the regression equations. South. J. Appl.For. 30(3):142–146.

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Factors influencing production efficiency of intensively managed loblolly pine plantations in a 1- to 4-year-old chronosequence

Forest Ecology and Management ◽

10.1016/j.foreco.2005.08.016 ◽

2005 ◽

Vol 218 (1-3) ◽

pp. 245-258 ◽

Cited By ~ 14

Author(s):

H.G. Adegbidi ◽

E.J. Jokela ◽

N.B. Comerford

Keyword(s):

Loblolly Pine ◽

Production Efficiency ◽

Pine Plantations ◽

Factors Influencing ◽

Intensively Managed

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Hydrologic calibration of paired watersheds using a MOSUM approach

Hydrology and Earth System Sciences Discussions ◽

10.5194/hessd-12-245-2015 ◽

2015 ◽

Vol 12 (1) ◽

pp. 245-279 ◽

Cited By ~ 4

Author(s):

H. Ssegane ◽

D. M. Amatya ◽

A. Muwamba ◽

G. M. Chescheir ◽

T. Appelboom ◽

...

Keyword(s):

Water Table ◽

Loblolly Pine ◽

Panicum Virgatum ◽

Management Practices ◽

Control Treatment ◽

Calibration Period ◽

Paired Watersheds ◽

Intensively Managed ◽

Land Use And Management ◽

Paired Watershed

Abstract. Paired watershed studies have historically been used to quantify hydrologic effects of land use and management practices by concurrently monitoring two neighboring watersheds (a control and a treatment) during the calibration (pre-treatment) and post-treatment periods. This study characterizes seasonal water table and flow response to rainfall during the calibration period and tests a change detection technique of moving sums of recursive residuals (MOSUM) to select calibration periods for each control-treatment watershed pair when the regression coefficients for daily water table elevation (WTE) were most stable to reduce regression model uncertainty. The control and treatment watersheds included 1–3 year intensively managed loblolly pine (Pinus taeda L.) with natural understory, same age loblolly pine intercropped with switchgrass (Panicum virgatum), 14–15 year thinned loblolly pine with natural understory (control), and switchgrass only. Although monitoring during the calibration period spanned 2009 to 2012, silvicultural operational practices that occurred during this period such as harvesting of existing stand and site preparation for pine and switchgrass establishment may have acted as external factors, potentially shifting hydrologic calibration relationships between control and treatment watersheds. Results indicated that MOSUM was able to detect significant changes in regression parameters for WTE due to silvicultural operations. This approach also minimized uncertainty of calibration relationships which could otherwise mask marginal treatment effects. All calibration relationships developed using this MOSUM method were quantifiable, strong, and consistent with Nash–Sutcliffe Efficiency (NSE) greater than 0.97 for WTE and NSE greater than 0.92 for daily flow, indicating its applicability for choosing calibration periods of paired watershed studies.

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Predicting Stand Attributes of Loblolly Pine in West Gulf Coastal Plain Using Gradient Boosting and Random Forests

Canadian Journal of Forest Research ◽

10.1139/cjfr-2020-0330 ◽

2020 ◽

Author(s):

Xiongwei Lou ◽

Yuhui Weng ◽

Luming Fang ◽

HL Gao ◽

Jason Grogan ◽

...

Keyword(s):

Loblolly Pine ◽

Random Forests ◽

Coastal Plain ◽

Mean Squared Error ◽

Pine Plantations ◽

Machine Learning Techniques ◽

Coefficient Of Determination ◽

Gradient Boosting ◽

Gulf Coastal Plain ◽

Intensively Managed

Two machine-learning techniques, gradient boosting (GB) and random forests (RF), were used to predict stand mean height (HT), trees per hectare (Tree ha-1) and basal area per hectare (BA ha-1) based on datasets collected from extensively- and intensively-managed loblolly pine plantations in the West Gulf Coastal Plain region. Models were evaluated using coefficient of determination (R2), bias and root mean squared error (RMSE) by applying models to independent dataset and then compared to the model (Coble et al. 2017) currently being used in the region. For extensively-managed plantations, the GB models had less bias, larger R2 and smaller RMSE than RF and HT model was the best, followed by those of Tree ha-1 and BA ha-1. Even for BA ha-1, the GB model had R2 over 0.83. GB and RF models outperformed the Coble et al. (2017); differences were notable for HT and Tree ha-1, but significant for BA ha-1. For intensively-managed plantations, GB and RF were similarly great in predicting HT and Tree ha-1, but GB outperformed RF in predicting BA ha-1. We recommend the use of GB models to predict quantitative information required for managing loblolly pine plantations in the region.

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Production dynamics of intensively managed loblolly pine stands in the southern United States: a synthesis of seven long-term experiments

Forest Ecology and Management ◽

10.1016/j.foreco.2004.01.007 ◽

2004 ◽

Vol 192 (1) ◽

pp. 117-130 ◽

Cited By ~ 104

Author(s):

Eric J. Jokela ◽

Philip M. Dougherty ◽

Timothy A. Martin

Keyword(s):

United States ◽

Loblolly Pine ◽

Southern United States ◽

Long Term Experiments ◽

Pine Stands ◽

Intensively Managed ◽

Production Dynamics

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Effects of planting density on canopy dynamics and stem growth for intensively managed loblolly pine stands

Forest Ecology and Management ◽

10.1016/j.foreco.2004.10.002 ◽

2005 ◽

Vol 205 (1-3) ◽

pp. 29-41 ◽

Cited By ~ 39

Author(s):

Rodney E. Will ◽

Nikhil V. Narahari ◽

Barry D. Shiver ◽

Robert O. Teskey

Keyword(s):

Loblolly Pine ◽

Stem Growth ◽

Planting Density ◽

Pine Stands ◽

Intensively Managed

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A 50-Year Retrospective of the Forest Productivity Cooperative in the Southeastern United States: Regionwide Trials

Journal of Forestry ◽

10.1093/jofore/fvaa046 ◽

2020 ◽

Author(s):

David R Carter ◽

H Lee Allen ◽

Thomas R Fox ◽

Timothy J Albaugh ◽

Rafael A Rubilar ◽

...

Keyword(s):

United States ◽

Loblolly Pine ◽

Southeastern United States ◽

50Th Anniversary ◽

Forest Productivity ◽

Site Preparation ◽

Growth Responses ◽

Area Index ◽

Vegetation Control ◽

Intensively Managed

Abstract In 2019, the Forest Productivity Cooperative (FPC) celebrated its 50th anniversary. The mission of the FPC is and has been creating innovative solutions to enhance forest productivity and value through the sustainable management of site resources. This industry-government-university partnership has generated seminal research with sweeping implications for increasing productivity throughout the southeastern United States and Latin America. To commemorate this semicentennial, we highlighted some of the pivotal findings in the southeastern United States from the past 50 years derived from our large, regional experiments: regionwide trials. Study Implications: Fifty years of research have yielded substantial management implications for intensively managed loblolly pine in the southeastern United States. Some of our most impactful findings are the following: our generalized fertilization rate of 200 lb ac−1 elemental N and 25 lb ac−1 elemental P has been found to increase growth on most plantations in the region when applied at or before midrotation, whereas the addition of K and micronutrients was found to be important on the Pleistocene Terraces. Stands with a leaf area index (LAI) less than 3.5 will respond to fertilization, increasingly, so the lower the initial LAI. Our long-term site preparation studies demonstrated the importance of pairing optimal site preparation with fertilization and that subsoiling and tillage typically yielded lesser gains than fertilization and vegetation control at establishment. Fertilization tends to be more important to growth responses at midrotation than onetime vegetation control treatments, but an additive response when the two treatments are applied together is generally experienced. When fertilization is paired with thinning, the rate of postthinning diameter growth is accelerated.

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