scholarly journals EVALUATION OF ASSORTMENTS CONSIDERING DIFFERENT STUMP AND PRE-BUCKING DISC HEIGHTS IN MECHANIZED HARVESTING OPERATIONS OF A Pinus taeda L. FOREST

FLORESTA ◽  
2019 ◽  
Vol 50 (1) ◽  
pp. 1133
Author(s):  
Gustavo Silva Oliveira ◽  
Philipe Ricardo Casemiro Soares ◽  
Jean Alberto Sampietro ◽  
Maycon Thuan Saturnino da Silva ◽  
Marcos Filipe Nicoletti ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Value Added ◽  
The Other ◽  
Economic Return ◽  
Process Improvements ◽  
Clear Cutting ◽  
Taper Function ◽  
Pinus Taeda L ◽  
A Company ◽  
Made In

This study aimed to evaluate assortments by adopting distinct stump heights and pre-bucking disc heights in the mechanized harvesting operations of a Pinus taeda L. forest, which is owned by a company located in Campo Belo do Sul (SC). To that end, the simulation of six scenarios was carried out after the forest’s clear-cutting. The scenario 1 includes the company's specifications. Scenario 2 includes the real situation, that is, the measurements made in sample units installed on the field and scenario 3 includes stump heights of 10 cm and pre-bucking disc heights of 5 cm. In the other scenarios, stump and pre-bucking disc heights with values higher than the ones specified by the company were included. Then, using a taper function, we calculated the assortments in tons per hectare (t ha-1) and monetary value per hectare (R$ ha-1), considering the price of wood with bark (R$ t-1) for each assortment. Results show that Scenario 1 presented a larger amount of wood, however, Scenario 3 represented higher revenue due to the higher wood quantity of the value-added assortments. On the other hand, Scenario 6 presented the lowest amount of wood comparing to the others, and Scenario 2 presented the lowest economic return. All things considered, the company performs its activities below what is planned, but with production higher than the other evaluated scenarios. Regarding the economic return, the other scenarios are more feasible than Scenario 2, which shows that the company needs to seek process improvements with the implementation of another scenario that could bring better results.

On the Future of the Financial Redistribution across Member States in the EU

2006 ◽  
Vol 56 (1) ◽  
pp. 1-43
Author(s):  
Sándor Richter
Keyword(s):  
Value Added ◽  
The Other ◽  
Current Debate ◽  
Member States ◽  
New Member States ◽  
Financial Position ◽  
Cross Member ◽  
Expenditure Structure ◽  
The Eu ◽  
Made In

The order and modalities of cross-member state redistribution as well as the net financial position of the member states are one of the most widely discussed aspects of European integration. The paper addresses selected issues in the current debate on the EU budget for the period 2007 to 2013 and introduces four scenarios. The first is identical to the European Commission's proposal; the second is based on reducing the budget to 1% of the EU's GNI, as proposed by the six net-payer countries, while maintaining the expenditure structure of the Commission's proposal. The next two scenarios represent radical reforms: one of them also features a '1% EU GNI'; however, the expenditures for providing 'EU-wide value-added' are left unchanged and it is envisaged that the requisite cuts will be made in the expenditures earmarked for cohesion. The other reform scenario is different from the former one in that the cohesion-related expenditures are left unchanged and the expenditures for providing 'EU-wide value-added' are reduced. After the comparison of the various scenarios, the allocation of transfers to the new member states in terms of the conditions prevailing in the different scenarios is analysed.

The Influence of Woody and Herbaceous Competition on Early Growth of Naturally Regenerated Loblolly and Shortleaf Pines

1991 ◽  
Vol 15 (4) ◽  
pp. 179-185 ◽  
Author(s):  
M. D. Cain
Keyword(s):  
Pinus Taeda ◽  
Woody Plants ◽  
Early Growth ◽  
The Other ◽  
Herbaceous Plants ◽  
Herbaceous Vegetation ◽  
Competition Control ◽  
Total Control ◽  
Four Levels ◽  
Pinus Taeda L

Abstract Four levels of competition control were used to study the response of naturally regenerated loblolly and shortleaf pines (Pinus taeda L. and P. echinata Mill.) in southern Arkansas. Treatments included: (1) Check (no competition control), (2) woody competition control, (3) herbaceous competition control, and (4) total control of nonpine vegetation. Herbaceous plants were controlled for 4 consecutive years, and woody plants were controlled for 5 years. Control of herbaceous vegetation resulted in significant increases in pine height, groundline diameter (GLD), and volume per tree. Control of only woody competition did not improve pine growth compared to untreated checks. After 5 years, pines on total control plots had significantly larger GLDs and significantly more volume per tree compared to pines on any other treatment. Pine growth gains were achieved with herbaceous competition control and total control of nonpine vegetation although these two treatments averaged 4,000 more pines/ac, in trees taller than 5 ft, than the other two treatments. Results of this investigation represent a unique standard of pine growth to which operational treatments might be compared. South. J. Appl. For. 15(4):179-185.

Tolerance of Loblolly Pines to Fusiform Rust

1995 ◽  
Vol 19 (2) ◽  
pp. 60-64 ◽  
Author(s):  
Charles H. Walkinshaw ◽  
James P. Barnett
Keyword(s):  
Pinus Taeda ◽  
Rust Fungus ◽  
The Other ◽  
Diameter Growth ◽  
Mature Trees ◽  
Fusiform Rust ◽  
Infected Tree ◽  
Loblolly Pines ◽  
Pinus Taeda L ◽  
Natchez Trace Parkway

Abstract Loblolly pines (Pinus taeda L.) that were 8 to 17 yr old tolerated one to three fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shiraif sp. fusiforme) galls in their stems. Families with four or more galls in their stems lost 25% or more of the trees by age 17. In living trees with less than four stem galls, diameter growth was comparable to that of trees with no galls. Tolerance was indicated by the ability of loblolly pines to maintain the rust fungus in stems that had dbh's similarto asymptomatic trees on the same site. In plantations, the number of galls in the stem was generally one to two per infected tree. This was also true for mature trees (12 to 38 in. dbh) along the Natchez Trace Parkway. These trees have been infected with fusiform rust for nearly 100 yr. On the other hand, the presence of four or more stem galls seems to be a reliable indicator of mortality rather than tolerance. South. J. Applied For. 19 (2): 60-64.

scholarly journals Evaluasi Proses Produksi Country kettle Pada PT PLB Dengan Pendekatan Lean Maufacturing

2021 ◽  
Vol 5 (1) ◽  
pp. 68
Author(s):  
Lina Aulia
Keyword(s):  
Lean Manufacturing ◽  
Value Added ◽  
Value Stream Mapping ◽  
Standard Material ◽  
Value Stream ◽  
Root Cause ◽  
Spinning Process ◽  
Unskilled Workers ◽  
A Company ◽  
Made In

PT PLB (pseudonym) is a company that produces household appliances and kitchen utensils. The country kettle is one type of product made by PT PLB. The productivity of the country kettle production line decreased by 56%. This was due to defective products. The largest percentage of defects in-country kettle products occurred in the spinning process of 40.18%. This study aimed to identify the causes of defects in-country kettle products and how to overcome them by designing improvement proposals. Lean manufacturing principles were used to evaluate the problems that occur. There were three types of lean manufacturing tools used in this study: Value Stream Mapping (VSM) and 5Ways. VSM was used to describe and identify value-added activities, non-value-added activities but necessary, and non-value-added activities so that the production process becomes lean. The root cause analysis was performed using the 5 Whys method. Unskilled workers and non-standard material types between suppliers are the highest contributors to defects in the spinning process. Based on this, this research was focused on improvements made in the spinning process. Proposals for improvements to the causes of the problems found are standardization of work procedures, standardization of supplier specifications, and arrangement of semi-finished goods and/or supplies. Based on the company's results, the proposed standardization of work procedures and arrangement of semi-finished goods and/or supplies may be implemented in the company. Meanwhile, the proposal for selecting suppliers is not feasible due to company limitations

Performance of Unthinned Loblolly and Slash Pine Plantations on Three Sites in South Carolina

1977 ◽  
Vol 1 (4) ◽  
pp. 8-10
Author(s):  
D. H. Van Lear ◽  
N. B. Goebel ◽  
J. G. Williams
Keyword(s):  
South Carolina ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Slash Pine ◽  
The Other ◽  
Fusiform Rust ◽  
Growth And Survival ◽  
Growing Seasons ◽  
Pinus Taeda L ◽  
Region Growth

Abstract The performance of adjacent unthinned plantations of loblolly (Pinus taeda L.) and slash pine (P. elliottii Engelm.) on three sites in South Carolina was evaluated after 16 growing seasons. Sites ranged from a noneroded Piedmont soil to an excessively drained sandy soil of the Sandhills physiographic region. Growth and survival varied widely among sites, with greatest productivity occurring in the Piedmont and the lowest in the Congaree Sandhills. Despite the droughty nature of the latter site, survival after 16 growing seasons was over 80 percent for both species. On a volume basis, loblolly pine outperformed slash pine at the upper Pidemont and Aiken Plateau sites, while slash pine was superior on the dry Sandhills site. Incidence of fusiform rust was much higher for both species at the Aiken Plateau than at the other sites.

Soil Properties and Pine Growth Affected by Site Preparation after Clearcutting

1985 ◽  
Vol 9 (1) ◽  
pp. 40-43 ◽  
Author(s):  
J. J. Stransky ◽  
J. H. Roese ◽  
K. G. Watterston
Keyword(s):  
Organic Matter ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Soil Nutrient ◽  
Site Preparation ◽  
Soil Samples ◽  
The Other ◽  
Pine Seedlings ◽  
Southeast Texas ◽  
Pinus Taeda L

Abstract A pine-hardwood sawtimber stand in southeast Texas was clearcut in September 1972. Random plots were burned, chopped, KG-bladed, or left untreated. In the spring of 1974, 1-0 loblolly pine seedlings (Pinus taeda L.) were handplanted at 8 by 10 foot spacing. Data from soil samples, taken from the 0-5 inch depth before clearcutting and 1, 3, and 5 years after site preparation showed that burning appeared to have changed soil nutrient levels the least. Of the two mechanical treatments, KG-blading altered the chemical composition of the soil most, probably because topsoil organic matter was removed. Planted pines survived and grew best on mechanically prepared areas, producing 1.5 to 3.3 times more cubic-foot volume per acre than either of the other treatments by the end of the eighth year.

Stand Structure and Yield Relationships in a 20-Year-Old Loblolly Pine Spacing Study

1981 ◽  
Vol 5 (3) ◽  
pp. 162-166 ◽  
Author(s):  
William R. Harms ◽  
F. Thomas Lloyd
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Structure ◽  
Maximum Yield ◽  
Basal Area ◽  
The Other ◽  
Pinus Taeda L

Abstract A loblolly pine (Pinus taeda L.) spacing study on a Piedmont site (SI 75, base age 25) had at age 20 a maximum yield of 49 cords per acre with a near maximum basal area of 187 square feet at a spacing of 8 x 8 feet. Comparative yields on the other spacings tested were: 6 x 6, 188 ft² and 43 cords; 10 x 10, 166 ft² and 45 cords; 12 x 12, 152 ft² and 43 cords. Sawtimber volume in trees larger than 9.5 inches in diameter rose from zero at 6 x 6 feet to almost 10,000 board feet per acre at 12 x 12 feet. Survival on the 6 x 6 plots was 71 percent; 8 x 8, 87 percent; 10 by 10, 92 percent; and 12 x 12, 93 percent.

Influence of Mechanical Site Preparation on Deer Forage in the Georgia Piedmont

1990 ◽  
Vol 14 (2) ◽  
pp. 77-80 ◽  
Author(s):  
Cynthia G. Lacascio ◽  
B. G. Lockaby ◽  
Jon P. Caulfied ◽  
M. Boyd Edwards ◽  
M. Keith Causey
Keyword(s):  
Pinus Taeda ◽  
Odocoileus Virginianus ◽  
Loblolly Pine ◽  
Site Preparation ◽  
The Other ◽  
Mechanical Site Preparation ◽  
Pinus Taeda L ◽  
Georgia Piedmont ◽  
Timber Growth

Abstract Seasonal standing crops of white-tailed deer (Odocoileus virginianus) forage were compared among five types of mechanical site preparation in a 6-year-old loblolly pine (Pinus taeda L.) plantation. Treatments were: unharvested control (C); harvest only (H); chainsaw residuals (CR); shear and chop (SC); and shear, rake, burn, and disk (SRBD). Diferences among treatments were compared within species and within forage groups (vines, forbs, grasses, woody). The CR and SC treatments, which consistently produced more forage biomass in all categories, also exhibited average or above-average timber growth relative to the other treatments. South. J. Appl. For. 14(2):77-80.

Supplemental Mass Pollination to increase Seed Yields in Loblolly Pine Seed Orchards

1982 ◽  
Vol 6 (2) ◽  
pp. 100-104 ◽  
Author(s):  
F. E. Bridgwater ◽  
D. L. Bramlett
Keyword(s):  
Pinus Taeda ◽  
Seed Yield ◽  
Loblolly Pine ◽  
Seed Orchard ◽  
The Other ◽  
Untreated Check ◽  
Pinus Taeda L ◽  
One Year ◽  
Seed Yields ◽  
Young Seed

Abstract Supplemental mass pollination was evaluated in a young and a mature loblolly pine (Pinus taeda L.) seed orchard in two successive years. Supplemental mass pollination reduced both conelet and ovule abortion in one year in the young seed orchard and resulted in a 222 percent greater potential seed yield than untreated check ramets. The response was small and statistically nonsignificant in the other year. The potential seed yield was not increased in either year in the mature seed orchard.

scholarly journals Trends in the distribution of added value of listed industrial companies: 1990 to 2002

2005 ◽  
Vol 36 (2) ◽  
pp. 85-94 ◽  
Author(s):  
N. Van Aswegen ◽  
B. W. Steyn ◽  
W. D. Hamman
Keyword(s):  
South African ◽  
Value Added ◽  
The Other ◽  
Added Value ◽  
Change Over Time ◽  
Industrial Companies ◽  
A Value ◽  
Significant Difference ◽  
A Company ◽  
Over Time

Value added is a measure of the increase in wealth of a company. The question posed in this paper, is whether there was a change over time; firstly in the percentage of added value by companies as a proportion of sales and secondly in the distribution of the added value between the different stakeholder groups.The ratio VA/sales and the VA distribution ratios were calculated for three samples:A full sample from 1990 to 2002, consisting of all the listed South African companies preparing a value added statement; A constant sample of 36 companies that existed from 1990 to 2002; and A constant sample of 55 companies that existed from 1994 to 2002.Although a slight downward trend was found in VA/sales from 1997/1998, there is not enough evidence to infer that there was a change over time in VA/sales as the differences in the central location for at least two years were not significant.It was determined that there was only one distribution ratio in each constant sample with a significant difference in the central locations between at least two of the years. These ratios were retention/VA for the constant sample from 1990 to 2002 and depreciation/VA for the constant sample from 1994 to 2002.The change over time in depreciation was probably caused by the change in accounting treatment for amortisation of intangible assets. Retention is a balancing figure – the leftovers after the other allocations have been done – it can therefore be expected that this ratio will be influenced by the changes in all the other allocations. The general prosperity of the company and the economy will also influence retention, as the total value added will change accordingly and that will determine what is being left for retention in the company. As the growth in the GDP increased during the period under review, it was no surprise to find an increase in the ratio retention/VA.

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