Short- and long-term effects of site preparation, fertilization and vegetation control on growth and stand development of planted loblolly pine

2003 ◽  
Vol 175 (1-3) ◽  
pp. 367-377 ◽  
Author(s):  
Urban Nilsson ◽  
H.Lee Allen
Keyword(s):  
Loblolly Pine ◽  
Site Preparation ◽  
Stand Development ◽  
Long Term Effects ◽  
Vegetation Control ◽  
Short And Long Term

Loblolly pine and mixed hardwood stand dynamics for 27 years following chemical, mechanical, and manual site preparation

1993 ◽  
Vol 23 (10) ◽  
pp. 2126-2132 ◽  
Author(s):  
Glenn R. Glover ◽  
Bruce R. Zutter
Keyword(s):  
Loblolly Pine ◽  
Stand Structure ◽  
Growth Yield ◽  
Basal Area ◽  
Site Preparation ◽  
Growth And Yield ◽  
Long Term Effects ◽  
Fayette County ◽  
Stand Basal Area

A site-preparation study installed in 1959 in Fayette County, Alabama, U.S.A., provides data to evaluate long-term effects of varying densities of hardwood on loblolly pine (Pinustaeda L.) plantation growth, yield, and stand structure. Six treatments (hand girdle; bulldoze scarification; herbicide applied to axe frill, chain frill, and with an injector; and an untreated check) were installed as a randomized complete block with five replications. Periodic measurements of pine and hardwood size and density show that higher hardwood densities existing early in the pine plantation had a substantial negative effect on loblolly pine survival and basal area yield, with the bulldoze and herbicide treatments having less hardwood and higher survival and stand basal area. Pine total height and diameter at breast height were reduced by increasing hardwood density early in the life of the plantation, but size of surviving trees differed little among treatments at later ages, except on plots where most pine trees were suppressed by hardwoods. Strong relationships between pine basal area per hectare at age 27 and both number of hardwood stems at age 3 and percentage of stand basal area in hardwood at age 6 were noted. These relationships indicate promise for predicting long-term growth and yield of loblolly pine plantations from early measures of hardwood interference.

Long-term effects of site preparation and postplanting vegetation control onPicea glaucasurvival, growth and predicted yield in boreal British Columbia

2009 ◽  
Vol 24 (2) ◽  
pp. 111-129 ◽  
Author(s):  
Jacob O. Boateng ◽  
Jean L. Heineman ◽  
Lorne Bedford ◽  
George J. Harper ◽  
Amanda F. Linnell Nemec
Keyword(s):  
British Columbia ◽  
Site Preparation ◽  
Long Term Effects ◽  
Vegetation Control

Saskatchewan Highways and Transportation Reduced Tire Pressure Initiative

1997 ◽  
Vol 1589 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Thomas L. Davies ◽  
Tami F. Wall ◽  
Allan Carpentier
Keyword(s):  
High Speed ◽  
Membrane Surface ◽  
Vehicle Stability ◽  
Road Maintenance ◽  
Long Term Effects ◽  
Tire Pressure ◽  
Reduced Pressure ◽  
Maintenance Costs ◽  
Short And Long Term

After examination of the research carried out by other agencies, Saskatchewan Highways and Transportation (SHT) embarked on an initiative to adapt low tire pressure technologies to the province's needs and environment. The focus of the initiative was to explore several technical questions from SHT's perspective: (a) Can low tire pressures be used to increase truck weights from secondary to primary without increasing road maintenance costs on thin membrane surface roads? (b) What are the short- and long-term effects of tire heating under high-speed/high-deflection constant reduced pressure (CRP) operations in a Saskatchewan environment? (c) What effects do lower tire pressures have on vehicle stability at highway speeds? To date, significant opportunities have been noted on local hauls (less than 30 min loaded at highway speeds) for CRP operation and long primary highway hauls that begin or end in relatively short secondary highway sections that limit vehicle weight allowed for the whole trip for central tire inflation technology. The background and environment for the initiative and the investigations and demonstrations envisioned and undertaken are briefly outlined.

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