An approach for using general soil physical condition–root growth relationships to predict seedling growth response to site preparation tillage in loblolly pine plantations

2006 ◽  
Vol 227 (1-2) ◽  
pp. 169-177 ◽  
Author(s):  
L.A. Morris ◽  
K.H. Ludovici ◽  
S.J. Torreano ◽  
E.A. Carter ◽  
M.C. Lincoln ◽  
...  
Keyword(s):  
Root Growth ◽  
Seedling Growth ◽  
Loblolly Pine ◽  
Physical Condition ◽  
Growth Response ◽  
Site Preparation ◽  
Pine Plantations

Effects of site preparation on timber and non-timber values of loblolly pine plantations

1998 ◽  
Vol 107 (1-3) ◽  
pp. 47-53 ◽  
Author(s):  
Jianbang Gan ◽  
Stephen H. Kolison ◽  
James H. Miller ◽  
Tasha M. Hargrove
Keyword(s):  
Loblolly Pine ◽  
Site Preparation ◽  
Pine Plantations

scholarly journals Response of Loblolly Pine Plantations to Late-Rotation Fertilization and Herbicide Applications in North Louisiana

2000 ◽  
Vol 24 (3) ◽  
pp. 166-175 ◽  
Author(s):  
Roger A. Williams ◽  
Kenneth W. Farrish
Keyword(s):  
Old Age ◽  
Loblolly Pine ◽  
Growth Response ◽  
Block Design ◽  
Volume Growth ◽  
Pine Plantations ◽  
Discount Rates ◽  
Rates Of Return ◽  
Age Class ◽  
North Louisiana

Abstract Late-rotation fertilization was studied over a 6 yr period in loblolly pine (Pinus taeda L.) plantations in north Louisiana. Fertilizer (150 lb/ac of nitrogen and 50 lb/ac of phosphorus) and herbicide (hexazinone, 2.5 lb ai/ac) were applied to five loblolly pine plantations in the 25-yr-old age class (25-26 yr), and five plantations in the 30-yr-old age class (30-32 yr). The study was established as a randomized block design with three blocks in each plantation. Three treatments studied were fertilizer (F), fertilizer+herbicide (FH), and herbicide (H), which were compared to a control. Diameter and volume growth responded significantly to treatments F and FH in both age classes. A greater per-tree response occurred in the 25-yr-old age class as a result of the additive effect of recent thinnings. The use of herbicide in treatments FH and H did not cause a significant increase in growth response. The growth response in treatment FH was not significantly different from the response in treatment F, nor was the growth response in treatment H significantly different from the control. In the 25-yr-old age class the response to fertilization (treatments F and FH) was allocated primarily to the larger trees. Treatments F and FH increased total volume growth (lb) by 48 and 55 ft3/ac/yr, respectively, over control plots while treatment H increased growth by 15 ft3/ac/yr. In the 30-yr-old age class, the response was distributed more evenly among all diameter classes. Treatments F and FH increased total volume growth on average of 58 and 60 ft³/ac/yr, respectively, over control plots while treatment H increased growth by 17 ft3/ac/yr. An economic analysis was performed using discount rates of 8% and 12%, and current prices and costs at the time of the study. Rates of return ranged from 29.6 to 38.8% under various economic scenarios (discount rates, prices and costs) in the 25-yr-old age class. The net present value equivalent to an annual income (EAI) gain for each of the 6 yr of the study ranged from $34.07-$60.54/ac/yr. These same economic scenarios produced rates of return of 23.3 to 31.9% in the 30-yr-old age class, with an EAI range of $18.98-$40.03/ac/yr. South. J. Appl. For. 24(3):166-175.

Soil change and loblolly pine (Pinus taeda) seedling growth following site preparation tillage in the Upper Coastal Plain of the southeastern United States

2007 ◽  
Vol 242 (2-3) ◽  
pp. 558-568 ◽  
Author(s):  
M. Chad Lincoln ◽  
Rodney E. Will ◽  
Lawrence A. Morris ◽  
Emily A. Carter ◽  
Daniel Markewitz ◽  
...  
Keyword(s):  
United States ◽  
Pinus Taeda ◽  
Seedling Growth ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Southeastern United States ◽  
Site Preparation

Conversion of dense lodgepole pine stands in west-central British Columbia into young lodgepole pine plantations using prescribed fire. 2. Effects of burning treatments on tree seedling establishment

1995 ◽  
Vol 25 (2) ◽  
pp. 175-183 ◽  
Author(s):  
B. Blackwell ◽  
M.C. Feller ◽  
R. Trowbridge
Keyword(s):  
Seedling Growth ◽  
Lodgepole Pine ◽  
Fire Severity ◽  
Site Preparation ◽  
Pine Plantations ◽  
Height Increment ◽  
Foliar Chemistry ◽  
Total Height ◽  
Burned Areas ◽  
Foliar Nutrient

The ecological effects of different treatments used to convert dense logdepole pine (Pinusconforta Dougl.) stands into young lodgepole pine plantations are being determined. The treatments used were bulldozing the trees and either broadcast burning the slash or bulldozing the slash into windrows, which were then burned. Burns were conducted under different fuel moisture conditions and state of fuel curing to achieve four classes of fire severity. Lodgepole pine seedling survival was affected by both site preparation and fire severity. Five years after outplanting, survival was significantly (p < 0.05) greater for areas between windrows (81%) than for areas beneath windrows (65%) or for broadcast-burned areas (67%). Survival was greatest after 5 years for low-severity burns in fresh slash (80%) compared with low-severity burns in cured slash and higher severity burns (67–69%). Seedling total height and height increment 5 years after outplanting were significantly greater (p < 0.05) in areas beneath windrows than in areas between windrows or in broadcast-burned areas. However, stem diameter was similar among all site preparation treatments. Fire severity had no effect on lodgepole pine total height, height increment, and basal diameter growth in any year after outplanting. Lodgepole pine seedling foliar nutrient levels were generally consistent with trends in seedling growth in that foliar concentrations generally tended to be higher when growth was higher (in the case of site preparation); however, no significant differences in growth were found (in the case of fire severity). This suggested that foliar nutrient levels could at least partly explain seedling growth results. Surface mineral soil (0–15 cm) chemistry exhibited similar trends to seedling foliar chemistry when site preparation treatments were compared, but not when fire severity classes were compared. This was attributed to foliar chemistry being controlled by factors other than soil chemistry alone.

scholarly journals Long-Term Effects of Drainage, Bedding, and Fertilization on Growth of Loblolly Pine (Pinus taeda L.) in the Coastal Plain of Virginia

2005 ◽  
Vol 29 (4) ◽  
pp. 205-214 ◽  
Author(s):  
Thomas R. Fox ◽  
Kevin H. Kyle ◽  
Lisa J. Andrews ◽  
W. Michael Aust ◽  
James A. Burger ◽  
...  
Keyword(s):  
Loblolly Pine ◽  
Coastal Plain ◽  
Growth Response ◽  
Block Design ◽  
Basal Area ◽  
Stand Density ◽  
Site Preparation ◽  
The Other ◽  
Long Term Effects ◽  
Lime Treatment

Abstract A site preparation study was established in 1968 at three locations in the Coastal Plain of Virginia. Three treatments were installed in a randomized complete block design: (1) chop, (2) bed, and (3) ditch. In 1978, four fertilizer treatments were superimposed on the site preparation study: (1) check, (2) phosphorus (P) only, (3) P + nitrogen (N), and (4) P + N + lime, converting it into a split-plot design. At age 33 years, height of the dominant loblolly pine in the ditch treatment was significantly greater than in the other site preparation treatments. However, there were no differences in stand density, diameter at breast height (dbh), basal area, or volume because of site preparation. This contrasts with the data collected at age 21 years, when total volume in both the bed treatment and the ditch treatment was greater than in the chop treatment. Changes in water table depths through time were the probable cause for decreased response to bedding and ditching. There was a large response to fertilization through age 33 years in this study. The P + N + lime treatment had significantly greater dbh, basal area, and volume than the other fertilizer treatments, which significantly increased pine stumpage value. The size of the growth response was greater at age 33 years than it was at age 21 years. Soil and foliage analysis suggests that the sustained growth response at this site was due to the added Ca. South. J. Appl. For. 29(4):205–214.

Site preparation influences on below ground competing vegetation and loblolly pine seedling growth

New Forests ◽  
1988 ◽  
Vol 2 (2) ◽  
pp. 131-138 ◽  
Author(s):  
B. G. Lockaby ◽  
J. M. Slay ◽  
J. C. Adams ◽  
C. G. Vidrine
Keyword(s):  
Seedling Growth ◽  
Loblolly Pine ◽  
Site Preparation ◽  
Competing Vegetation ◽  
Below Ground
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