scholarly journals Comparison of Regeneration and Yield Status between Community Forest and Collaborative Forest

2019 ◽  
Vol 2 (1-2) ◽  
pp. 26-36
Author(s):  
Pitamber Gaire ◽  
Pramod Ghimire

The present article primarily addresses the silvicultural system (i.e., irregular shelter wood system) in Sal forest adopted in both community and collaborative forest in Kapilbastu district of Nepal. Systematic sampling with 0.5 percent sampling intensity along with statistical tools like SPSS and MS-Excel were used for resource inventory and data analysis, respectively. The result of the study shows notable increase in seedling status during the first year (2015/16) in community forest. A decrease in sapling number during the second year (2016/17) was noticed in Tilaurakot collaborative forest at its initial level of implementation. At the same time, community forest has higher yield status with a smaller number of trees felled in Tilaurakot collaborative forest under regeneration felling. The regeneration status of species varied insignificantly (p>0.05) between the community forest and Tilaurakot collaborative forest. A recommendation is made for proper implementation of irregular shelter wood system for managing the existing degraded Sal forests of the Terai region of Nepal; however, its long-term effects on plant species diversity should also be further studied in detail.

1964 ◽  
Vol 44 (1) ◽  
pp. 32-36 ◽  
Author(s):  
C. J. S. Fox

Experiments were conducted on grassland in four counties in Nova Scotia from 1952 to 1962 to evaluate the effectiveness of aldrin at 3 or 6 lb, dieldrin at 6 lb, chlordane at 8 or 10 lb, heptachlor at 6 lb, and lindane at 0.75, 1.0, or 1.5 lb of toxicant per acre in controlling the wireworms Agriotes mancus (Say), A. sputator (L.), A. lineatus (L.), and A. obscurus (L.). The insecticides were applied once as surface sprays without subsequent cultivation, except in one experiment where oats were sown. Aldrin, dieldrin, chlordane, and heptachlor usually did not control wireworms as well during the first year after application as during the second year. Aldrin and chlordane gave measurable control for as long as 10 years after application. Dieldrin and heptachlor gave at least 95% control 7 years (the duration of the pertinent experiments) after application. Lindane was not effective for as long as the other insecticides. In several cases initial control was followed by a resurgence or "flare-up" of wireworm numbers. All treatments resulted in increased yields of hay, in some cases exceeding 200%, for several years after application.


HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 436E-436
Author(s):  
Martin P.N. Gent

The persistence of effects of paclobutrazol or uniconazol on stem elongation was determined for several years after large-leaf Rhododendron and Kalmia latifolia were treated with a single-spray application of these triazol growth-regulator chemicals. Potted plants were treated in the second year from propagation, and transplanted into the field in the following spring. The elongation of stems was measured in the year of application and in the following 2 to 4 years. Treatments with a wide range of doses were applied in 1991, 1992, or 1995. For all except the most-dilute applications, stem elongation was retarded in the year following application. At the highest doses, stem growth was inhibited 2 years following application. The results could be explained by a model of growth regulator action that assumed stem elongation was inversely related to amount of growth regulator applied. The dose response coefficient for paclobutrazol was less than that for uniconazol. The dose that inhibited stem elongation one-half as much as a saturating dose was about 0.5 and 0.05 mg/plant, for paclobutrazol and uniconazol, respectively. The dose response coefficient decreased exponentially with time after application, with an exponential time constant of about 2/year. The model predicted a dose of growth regulator that inhibited 0.9 of stem elongation immediately after application would continue to inhibit 0.5 of stem elongation in the following year.


Author(s):  
E. V. Emelianov

The article considers the changes in US foreign trade policy at the beginning of the Trump’s presidency. Exporting is a critical component for the long-term growth and the U.S. economy overall, and supporting millions of jobs in US. Though D. Trump campaigned for president as a protectionist, there was no such steps the first year of his presidency. But his second year in the White House began with announcing new tariffs on solar panels, washing machines, then on steel, aluminium. As concerning steel products, the United States being the world’s largest steel importer have persistent trade deficit.The US trade law allows the president to limit imports in case if domestic industries are threatened, against unfair foreign trade practices for a period of time, but such measures were not frequent in US practice. Meanwhile new protectionist measures are debated. Trump’s policy is being opposed not only by trade partners of the US, but in the US as well, by those who argue that protectionist measures will complicate international relationships.


2020 ◽  
Vol 12 (8) ◽  
pp. 3127
Author(s):  
Carolina Cosculluela-Martínez

Investment in every type of asset increases GDP and net employment differently. This paper compares the effect produced by a permanent unitary shock in Sustainable Knowledge for the Primary Sector (SKPS) on the Spanish employment and GDP growth with the effect produced by the other fourteen capital stock types. The methodology used is a Vector Error Correction Model (VECM), where the complementary capital can affect SKPS instantaneously. The results suggest that SKPS produces the second-highest, short and long-term effects on both labor and production, per Euro invested; moreover, the investment of 4.3 thousand euros is retrieved in the first year and increases net employment in one person after four years. Accordingly, the 5 million Euro Budget to invest in sustainable machinery and processing techniques increases net employment by 827 employees.


1998 ◽  
Vol 20 (2) ◽  
pp. 302
Author(s):  
D. Goldney

A long-term mark-recapture program has been carried out on the Duckmaloi Weir (near Oberon, New south Wales) and associated river over the period 1986 to the present. The pipehead weir creates a long shallow ·pool' about 2.5 ha in area, ideal for gill-netting platypuses. One hundred and eighty-two (182) individual animals have been captured in excess of 500 times. The majority of animals have been captured in the weir pool. A very dynamic situation exists with new adults and juveniles being captured on a regular basis and conversely captured animals "disappearing" on a regular basis from the system. Some individuals exhibit both transience and site attachment characteristics. However, relatively few animals remain site attached for long periods of time. Sixty nine percent of individuals are captured two or fewer times. Band loss cannot account for this phenomenon. Of the captured animals, 11.3% have been caught more than 5 times. The sex ratio of the population favours females in first capture adults (1:1.72) but males in first capture juveniles (1:0.73). Females are more likely to be recaptured than males. The sex ratio of juveniles varies significantly from year to year. The period between recaptures varies greatly and can be up to 6 years. Four animals have been captured over nine years (3 females/1 male) but no animal has been captured every year of the study. Recruitment has occurred at levels able to maintain the current population numbers. Thirty percent of available adults have been found lactating, including second year females. Seventy one percent of first year capture juveniles and 89.9% of first capture adults "disappear" within two years of first capture. Forty two percent of juvenile animals reach adult status before "disappearing".


A summary of results obtained from the first year of Ariel-5 All-Sky Monitor operation is presented. Transient source observations, as well as the results of long-term studies of Sco X-1, Cyg X-3 and Cyg X-1 are described. By example, the included results are indicative of the temporal effects to which the All-Sky Monitor remains sensitive as it begins its second year of observation.


Nutrition ◽  
2000 ◽  
Vol 16 (11-12) ◽  
pp. 1056-1063 ◽  
Author(s):  
Daniza M Ivanovic ◽  
Boris P Leiva ◽  
Hernan T Perez ◽  
Nelida B Inzunza ◽  
Atilio F Almagià ◽  
...  

2016 ◽  
Vol 15 (2) ◽  
pp. ar20 ◽  
Author(s):  
Stacia E. Rodenbusch ◽  
Paul R. Hernandez ◽  
Sarah L. Simmons ◽  
Erin L. Dolan

National efforts to transform undergraduate biology education call for research experiences to be an integral component of learning for all students. Course-based undergraduate research experiences, or CUREs, have been championed for engaging students in research at a scale that is not possible through apprenticeships in faculty research laboratories. Yet there are few if any studies that examine the long-term effects of participating in CUREs on desired student outcomes, such as graduating from college and completing a science, technology, engineering, and mathematics (STEM) major. One CURE program, the Freshman Research Initiative (FRI), has engaged thousands of first-year undergraduates over the past decade. Using propensity score–matching to control for student-level differences, we tested the effect of participating in FRI on students’ probability of graduating with a STEM degree, probability of graduating within 6 yr, and grade point average (GPA) at graduation. Students who completed all three semesters of FRI were significantly more likely than their non-FRI peers to earn a STEM degree and graduate within 6 yr. FRI had no significant effect on students’ GPAs at graduation. The effects were similar for diverse students. These results provide the most robust and best-controlled evidence to date to support calls for early involvement of undergraduates in research.


2021 ◽  
Author(s):  
Renske Altena ◽  
Sofie A.M. Gernaat ◽  
Ulla Wilking ◽  
Narsis A. Kiani ◽  
Aina Johnsson ◽  
...  

Abstract Background Advances in the treatment of metastatic breast cancer (mBC) have led to improved life expectancy. Many cancer survivors desire to return to paid work to enhance their sense of well-being. For patients with mBC, little is known about how the diagnosis impacts ability to work or the factors that increase the need for sickness benefits. Patients and methods Data were collected from two Swedish national registers, for females ages 18 to 63 years in the Stockholm-Gotland healthcare region with a new diagnosis of mBC from 1997 through 2011. Type of first-line palliative treatment was identified in medical records of a subset of the study population. Use of sickness absence (SA) and disability pension (DP) by these patients during the year before and one and two years after mBC diagnosis was determined from a third register. Regression analysis was performed to ascertain which covariate factors were associated with long-term (> 30 days) SA. Results A total of 1,240 patients were evaluated the year before and the first year after mBC diagnosis; only 805 patients were still alive and evaluated the second year after diagnosis. The proportions of patients having SA and DP were 56.0% and 24.8% the year before, 69.9% and 28.9% the first year after, and 64.0% and 34.7% the second year after diagnosis, respectively. Adjusted odds of having long-term SA were significantly higher at 1 and 2 years after diagnosis for patients with age < 45 years (AOR = 3.43 and AOR = 1.70, respectively), early calendar year of diagnosis (AOR = 1.72 and AOR = 1.79, respectively), metachronous mBC (AOR = 4.85 and AOR = 4.52, respectively), and SA ≥ 90 days the year before diagnosis (AOR = 3.44 and AOR = 1.98, respectively). Odds were also significantly higher the second after diagnosis for patients treated with chemotherapy (AOR = 1.81) or radiotherapy (AOR = 2.23), compared to those treated with hormonal therapy, Conclusions Rates of SA and DP increase after a diagnosis of mBC. Women who are younger, develop metachronous mBC, use SA heavily before mBC, and receive chemotherapy or radiotherapy have a greater need for sickness benefits after an mBC diagnosis.


Sign in / Sign up

Export Citation Format

Share Document