scholarly journals Biomass and Carbon Stock Variation along slopes in Tropical Forest of Nepal: A case of Depard Community Forest, Makwanpur, Nepal

2021 ◽  
Vol 1 (2) ◽  
pp. 89-99
Author(s):  
Birendra Bohara ◽  
Mahamad Sayab Miya ◽  
Sachin Timilsina ◽  
Deepak Gautam ◽  
Siddhartha Regmi
Keyword(s):  
Carbon Stock ◽  
Sampling Method ◽  
Secondary Data ◽  
Total Biomass ◽  
Tree Biomass ◽  
Community Forest ◽  
Circular Area ◽  
Spss Software ◽  
The Difference ◽  
Non Destructive

This study was conducted to assess biomass and carbon stock along slopes in Depard community forest, Manahari-6, Makwanpur district of Nepal. In Nepal, carbon stock estimation has been less practiced in community forest. A random sampling method was applied in this study to collect biophysical data i.e. DBH and height by non-destructive method to estimate the quantity of tree biomass and carbon stock. 21 sample plots with 1% sampling intensity were established within the study area. The circular area of 250 m2 was predetermined with the radius of 8.92 m for this study. Secondary data were collected through published and unpublished literature. Data were pooled and analyzed with SPSS software. The total biomass and carbon stock were calculated to be 1381.30 t/ha and 649.21 t/ha, respectively. The biomass and carbon stock were highest (563.12 t/ha and 242.42 t/ha) in 0-5% slope, and lowest in >20% of slope (334.75 t/ha and 143.60 t/ha). The difference of biomass and carbon in slopes may be due to the accumulation of more organic matter and other minerals in the less sloped areas through rainfall, landslide.

scholarly journals Estimation on the Change of Above-Ground Carbon Stock in Arboretum University of Lampung

2018 ◽  
Vol 6 (2) ◽  
pp. 51
Author(s):  
Kristian Gomos Banjarnahor ◽  
Agus Setiawan ◽  
Arief Darmawan
Keyword(s):  
Carbon Stock ◽  
The Body ◽  
Total Carbon ◽  
Biomass Estimation ◽  
Total Biomass ◽  
Biomass Carbon ◽  
Process Plants ◽  
Carbon Dioxide Co2 ◽  
Non Destructive ◽  
Earth Temperature

Carbon dioxide (CO2) is a greenhouse gas that could increase earth temperature. Through the photosynthesis process, plants absorb CO2 then convert it into carbohydrates, then sequester it in the body of plants. The purpose of the study is to estimate the changes in the carbon stock at the Arboretum University of Lampung. The methods used were stock difference by counting the carbon changes or difference between carbon stored in 2010 and 2016. While the stand biomass estimation measured by trees general allometric equations with non-destructive sampling. The results showed that the total carbon was 46% of the total biomass. Carbon stock in 2016 were about 226.75 ton/ha, showing an increase of 59.72% or 84.78 ton/ha compared to in 2010’s. The increase was due to additional growth of 804 trees as a result of plantation activity and natural regeneration. Keywords: Arboretum, biomass, carbon, necromass, University of Lampung.

scholarly journals KONTRIBUSI KOMPOSISI VEGETASI DALAM PENYIMPANAN DAN SERAPAN KARBON DI HUTAN RAKYAT DESA NEGARA RATU II KECAMATAN NATAR KABUPATEN LAMPUNG SELATAN

2019 ◽  
Vol 2 (2) ◽  
pp. 112
Author(s):  
Dian Afriansyah ◽  
Duryat Duryat ◽  
Hari Kaskoyo
Keyword(s):  
Sampling Method ◽  
The Body ◽  
Cluster Sampling ◽  
Carbon Uptake ◽  
Body Parts ◽  
Community Forest ◽  
Variance Test ◽  
Community Forests ◽  
Non Destructive ◽  
Public Forests

Tree stands in community forest have potential to absorb carbon in the air by storing in the body parts of the tree.  This study aims to determine the effect of community forest’s stand types on the number of reserves and carbon uptake.  The sampling method used is the cluster sampling method to determine the sample.  Biomass data are collection destructive and non destructive methods.  Estimation of biomass is carried out using the allometric equations.  Measurement of carbon content using the formula from BSN (2011) x 0.47.  Comparative  analysis of carbon reserves and removals uptake using the variance test  and 5 % BNT test.  Public  forests in the Negara Ratu II village with gold teak stands have carbon reserves and removals (135.87 tons/ha and 499,00 ton/ha). the most significant compared to community forests with other types of stands. While the reserve value and carbon uptake between white teak (44.86 tons/ha and 164.63 tons/ha), acacia (54.13 tons/ha and 191.20 tons/ ha), red jabon (51.20ton/ha and 187.90 tons/ha), white jabon (59.51 tons/ha and 218.40 tons/ha), is no different.  

scholarly journals HUBUNGAN VOLUME TEGAKAN DENGAN KANDUNGAN BIOMASSA TERSIMPAN SKALA PLOT PADA AREAL AGROFORESTRY DUSUNG DI DUSUN TOISAPU KOTA AMBON

2019 ◽  
Vol 3 (1) ◽  
pp. 40-54
Author(s):  
Ivan Passal ◽  
Gun Mardiatmoko ◽  
Fransina Latumahina
Keyword(s):  
Carbon Content ◽  
Total Carbon ◽  
Total Biomass ◽  
Tree Biomass ◽  
Community Forest ◽  
Total Carbon Content ◽  
Stand Volume ◽  
Plot Area ◽  
Biomass Potential ◽  
The Relationship

 The study was carried out in the Dusung Community Forest (Agroforestry) area of ​​Toisapu Negeri Hutumuri Hamlet, South Leitimur Sub-District, Ambon City in August - October 2018 to determine the relationship between stand volume and stored biomass for scale plots in dusung agroforestry areas in Toisapu Hamlet. For this reason, it begins with an inventory of potential at seedling, sapling, pole and tree levels so that information and data on the actual potential of carbon content in the dusung system are obtained based on the value of the diversity of stand volume and biomass content. The results of the three measurement plots showed that the highest biomass was seen to be dominated by Durian, Pala and Langsat and Duku and Clove plants. Based on the calculation of the biomass value of the total carbon content in the three plots, it can be seen biomass potential for a total 400 m² plot area or 0.04 ha for the three plots with an area of ​​1,200 m² or 0.12 ha having a total biomass of 50,783.77 Kg / m² multiplied by the assumption of 0.5% of the total amount of tree biomass and poles so that the total carbon content stored in the three plots is 25,391.88 kg / m² or 2,539.19 tons / ha.

scholarly journals Difference Analysis of Social Performance With The Islamic Social Reporting (ISR) in Syariah Banking That Are in Indonesia and Malaysia

2017 ◽  
Vol 1 (01) ◽  
pp. 53
Author(s):  
Aprila Dwi Widayati ◽  
Raditya Sukmana
Keyword(s):  
Sampling Method ◽  
Social Performance ◽  
Secondary Data ◽  
Social Reporting ◽  
Annual Reports ◽  
Islamic Banking ◽  
Islamic Banks ◽  
Content Analysis Method ◽  
The Difference ◽  
Better Than

<p>The purpose of this research is to examine the difference of Islamic Social Reporting (ISR) disclosure level of islamic banking in Indonesia and Malaysia based on ISR index. The samples were selected by purposive sampling method. The samples that is used in this research is five islamic banks in Indonesia and five islamic banks in Malaysia. This research uses secondary data, that is annual report from 2010-2012. Annual reports were analyzed using content analysis method. Furthermore, the differences of ISR disclosure level were tested using independent sample t-test. The results showed that ISR disclosure level of islamic banking in Indonesia is better than ISR disclosure level of islamic banking in Malaysia. Based on the results of hypothesis testing, found that there are significant differences in the disclosure level between islamic banking in Indonesia and Malaysia.</p><p><br />Keywords: Islamic Social Reporting, Islamic Social Reporting Index, Islamic Banking</p>

Use of Randomized Branch and Importance Sampling to Estimate Loblolly Pine Biomass

1989 ◽  
Vol 13 (4) ◽  
pp. 181-184 ◽  
Author(s):  
Roger A. Williams
Keyword(s):  
Importance Sampling ◽  
Loblolly Pine ◽  
Sampling Method ◽  
Sampling Error ◽  
Total Biomass ◽  
Tree Biomass ◽  
Individual Tree ◽  
Wide Range ◽  
Pinus Taeda L ◽  
Source Of Error

Abstract A previously developed sampling method utilizing randomized branch and importance sampling for the purpose of quickly estimating tree biomass was tested on five loblolly pine (Pinus taeda L.) trees. Results show a wide range of per-tree sampling error, ranging from 5.3 to 28.9%. Largevariation in foliage content among selected branches per treee may be a major source of error. However, the sampling error for the total biomass of the five trees tested was only 3.3%. This sampling method appears to be reliable and efficient in obtaining precise estimates of the total biomassof a population of trees. Increased sampling intensity per tree is necessary to obtain precise estimates of individual tree biomass. South. J. Appl. For. 13(4):181-184.

scholarly journals Biomass Carbon Content in Schima- Castanopsis Forest of Midhills of Nepal: A Case Study from Jaisikuna Community Forest, Kaski

2018 ◽  
Vol 6 (4) ◽  
pp. 72-83
Author(s):  
Sushma Tripathi ◽  
Chandra Bahadur Thapa ◽  
Amrit Sharma ◽  
Ganesh Paudel
Keyword(s):  
Carbon Content ◽  
Leaf Litter ◽  
Carbon Stock ◽  
Total Biomass ◽  
Biomass Carbon ◽  
Community Forest ◽  
Community Forests ◽  
Carbon Biomass ◽  
Below Ground

Community forests of Nepal’s midhills have high potentiality to sequester carbon. This paper tries to analyze the biomass carbon stock in Schima-Castanopsis forest of Jaisikuna community forests of Kaski district, Nepal. Forest area was divided into two blocks and 18 sample plots (9 in each block) which were laid randomly. Diameter at Breast Height (DBH) and height of trees (DBH≥5cm) were measured using the DBH tape and clinometer. Leaf litter, herbs, grasses and seedlings were collected from 1*1m2 plot and fresh weight was taken. For calculating carbon biomass is multiplied by default value 0.47. The AGTB carbon content of Chilaune, Katus and other species were found 19.56 t/ha, 18.66 t/ha and 3.59 t/ha respectively. The AGTB of Chilaune dominated, Katus dominated and whole forest was found 43.78 t/ha, 39.83 t/ha and 41.81 t/ha respectively. Carbon content at leaf litter, herbs, grasses and seedlings was found 2.73 t/ha. Below ground biomass carbon at whole forest was found 6.27 t/ha. Total biomass and carbon of the forest was found 108.09 t/ha and 50.80 t/ha respectively. Difference in biomass and carbon content at Chilaune dominated block and Katus dominated block was found insignificant. This study record very low biomass carbon content than average of Nepal's forest but this variation in carbon stock is not necessarily due to dominant species present in the forest. Carbon estimation at forest of different elevation, aspect and location are recommended for further research. International Journal of EnvironmentVolume-6, Issue-4, Sep-Nov 2017, page: 72-84

scholarly journals Analisis Perbedaan Kinerja Sosial Dengan Indeks Islamic Social Reporting (ISR) pada Perbankan Syariah Yang Ada di Indonesia dan Malaysia

2017 ◽  
Vol 4 (1) ◽  
pp. 62
Author(s):  
Aprilia Dwi Widayati ◽  
Raditya Sukmana
Keyword(s):  
Sampling Method ◽  
Secondary Data ◽  
Social Reporting ◽  
Annual Reports ◽  
Islamic Banking ◽  
Islamic Banks ◽  
Analysis Method ◽  
Content Analysis Method ◽  
The Difference ◽  
Better Than

The purpose of this research is to examine the difference of Islamic Social Reporting (ISR) disclosure level of islamic banking in Indonesia and Malaysia based on ISR index. The samples were selected by purposive sampling method. The samples that is used in this research is five islamic banks in Indonesia and five islamic banks in Malaysia. This research uses secondary data, that is annual report from 2010-2012. Annual reports were analyzed using content analysis method. Furthermore, the differences of ISR disclosure level were tested using independent sample t-test. The results showed that ISR disclosure level of islamic banking in Indonesia is better than ISR disclosure level of islamic banking in Malaysia. Basedon the results of hypothesis testing, found that there are significant differences in the disclosure level between islamic banking in Indonesia and Malaysia.

scholarly journals Above-ground carbon stock at Kamojang Regions, West Java, Indonesia

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
DWIKI DANANG KUNCORO ◽  
TEGUH HUSODO ◽  
JOKO KUSMORO ◽  
RANDI HENDRAWAN ◽  
SUROSO ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Storage ◽  
Carbon Stock ◽  
Sampling Method ◽  
Co2 Absorption ◽  
Destructive Sampling ◽  
West Java ◽  
Region Data ◽  
Carbon Dioxide Co2 ◽  
Non Destructive

Abstract. Kuncoro DD, Husodo T, Kusmoro J, Hendrawan R, Suroso, Afriyanti F, Megantara EN. 2020. Above-ground carbon stock at Kamojang Regions, West Java, Indonesia. Biodiversitas 21: 1749-1754. Kamojang is one of the regions that have the potential for carbon dioxide (CO2) sequestration and carbon storage for the southern side of West Java Province, Indonesia. The existence of vegetation as a provider of ecological services in the form of carbon dioxide (CO2) absorption and carbon storage certainly has a very important role, either in living conditions (biomass) or dead conditions (necromass). The aims of this study are to determine the total amount of above-ground carbon stock and determine the type of land-use that has the greatest carbon storage potential in the Kamojang region. Data collection in this research combines destructive and non-destructive methods. The measurement of biomass was carried out by the non-destructive sampling method for the category of sapling, poles, trees and necromass and the destructive sampling method for the category of undergrowth and litter. The results showed total above-ground carbon stored in Kamojang area is 4,995.75 t C with the largest potential value of carbon stock in the pine production forest of 163.79 t C/ha.

scholarly journals Estimation of biomass potential, carbon stocks, and carbon sequestration of Trigona sp honey bees feed

2021 ◽  
Vol 886 (1) ◽  
pp. 012072
Author(s):  
Muthmainnah ◽  
A Abdullah ◽  
A Ridha ◽  
S Rusyidi
Keyword(s):  
Carbon Sequestration ◽  
Honey Bees ◽  
Conversion Rate ◽  
Carbon Stock ◽  
Carbon Stocks ◽  
Tree Level ◽  
Total Biomass ◽  
Tree Biomass ◽  
Biomass Potential ◽  
Potential Carbon

Abstract This study aimed to determine the biomass potential of Trigona sp honey bees in Bontotiro subdistrict as well as its carbon stock and carbon sequestration. The research was carried out for two months starting from May to June 2021, located in the sub district of Bontotiro, district of Bulukumba. The biomass measurement was carried out by making 11 plots with a size of 20 x 20 for the tree level, 10 m x 10 m for the poles level, and 5 m x 5 m for the sapling level. Tree biomass was calcula ted using allometric equations. Measurement of carbon stocks was carried out by multiplying the total biomass with the percentage value of carbon content of 0.47, while the carbon sequestration was calculated by multiplying the average annual growth of biomass with the conversion rate of 1.4667 obtained from the photosynthesis equation. The results showed that the potential of biomass of tree, poles, and sapling levels were 4.5, 1.4, and 0.3 tons/year, respectively. The carbon stocks of the tree, poles, and sapling levels were 68.6, 13.7, and 1.8 tons/year, respectively. The carbon sequestration of the tree, poles, and sapling were 6.6, 2.1, and 0.56 tons/year, respectively.

scholarly journals Analisis Overreaction Saham Winner - Loser Pada Perusahaan Indeks BISNIS - 27 Di Bursa Efek Indonesia

2017 ◽  
pp. 3951
Author(s):  
Putu Trisna Dewanthi ◽  
I Gusti Bagus Wiksuana
Keyword(s):  
Abnormal Return ◽  
Sampling Method ◽  
Secondary Data ◽  
Statistical Test ◽  
Market Model ◽  
Average Difference ◽  
Expected Return ◽  
Average Abnormal Return ◽  
The Difference ◽  
Actual Return

This study aims to analyze the existence of overreaction of stock market winner and loser on the index companies of BISNIS -27 of the Indonesia Stock Exchange.The study is a comparative study by using secondary data. The sample determination was done by purposive sampling method. The number of population was 27 companies and the samples obtained after selection were 25 companies listed in the index of BISNIS-27 of 2016. Of the 25 companies there were 14 stocks classified as winners and 11 stocks classified as losers. The research used abnormal return as the research variable. Abnormal return was obtained from the difference between actual return and expected return. The method used to calculate the expected return was market model. The statistical test used was independent sample t-test, to test the average difference of abnormal return winner and the average abnormal return loser.The result of the research based on hypothesis testing showed that there was no statistically significant overreaction on the companies listed in the index of BISNIS-27 throughout 2016, which was indicated by the abnormal return of winner stock consistently larger than the abnormal return of loser stock significantly.

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