scholarly journals Primary Productivity of Jatigede Reservoir Based on Light and Dark Bottle Method

2021 ◽  
pp. 1-9
Author(s):  
Firda N. Aquila ◽  
. Zahidah ◽  
Heti Herawati ◽  
Herman Hamdani
Keyword(s):  
Primary Productivity ◽  
Sampling Method ◽  
Oxygen Demand ◽  
Quality Parameters ◽  
Survey Method ◽  
Dark Bottle ◽  
Compensation Depth ◽  
Different Depths ◽  
Carbon Dioxide Co2

This research aims to determine the value of primary productivity by using light-dark bottles at different depths in Jatigede Reservoir, Sumedang, West Java. This research was conducted from October 2020 until March 2021 using survey method research. Determination of the research location was done by using the purposive sampling method. Sampling was carried out at five stations and three depths: surface, 0.5 compensation depth, and compensation depth. The results showed that the primary productivity in Jatigede Reservoir ranged from 300.29-1013.47 mgC/m3/day. The results of supporting water quality parameters are light transparency ranging from 38-150 cm, temperature ranging from 26.6-29.7 oC, pH ranging from 6.69-8.7, carbon dioxide (CO2) ranging from 4.4-22.0 mg/ l, dissolved oxygen (DO) ranged from 3.00–6.6 mg/l, Biochemical Oxygen Demand (BOD) ranged from 1.62-16.22 mg/l, ammonia ranged from 0.0004-0.0055 mg/l, nitrate ranged from 0.017-0.044 mg/l and phosphate ranged from 0.06-0.14 mg/l. Based on the value of primary productivity, the waters of the Jatigede Reservoir are categorized as mesotrophic waters.

scholarly journals Water Quality Distribution in Situ Gunung Putri Bogor Regency, Indonesia

2019 ◽  
pp. 1-8
Author(s):  
Zahidah Hasan ◽  
Thoriq Ilham ◽  
Yuli Andriani ◽  
Heti Herawati ◽  
Fachmijany Sulawesty
Keyword(s):  
Water Quality ◽  
Chemical Oxygen Demand ◽  
Secchi Depth ◽  
Oxygen Demand ◽  
Aquatic Organisms ◽  
Quality Parameters ◽  
Survey Method ◽  
Optimal Range ◽  
Surface Level

The purpose of this study was to determine water quality distribution in Situ Gunung Putri. This research was conducted from February to March 2019, carried out in Situ Gunung Putri and at the Limnology Research Center of the Indonesian Institute of Sciences, both located in Bogor, West Java. The method used was the survey method. The results showed that, at the surface level, the temperature ranged between (28.14±0.52 and 30.61±1.76)°C, transparency between (0.38±0.12 and 0.65±0.06) m, dissolved oxygen (DO) was between 1.92±1.10 and 5.7± 2.55 mg / L, chemical oxygen demand (COD) was between 42.22±9.86 and 54.09±15.89, nitrate between (0.047±0.009 and 0.05±0.015) mg / L, phosphate of (0.015±0.002 and 0.022± 0.004) mg / L and pH was between 7.11± 0.27 and 7.33 ±0.34. Meanwhile at the Secchi depth values of the temperature ranged between (2.93±0.71 and 29.96 ±1.71)°C, DO was 1.14 ±0.90 and 3.37±1.63  mg / L, nitrate was 0.045±0.008 and 0.056±0.019 mg / L, phosphate was 0.016±0.003 and 0.035± 0.043 mg / L and pH was between 6.68± 0.33 and 7.11 ±0.28.  Based on these values water quality parameters except COD in  Situ Gunung Putri is still at the optimal range  for aquatic organisms.

scholarly journals Kompensasi Memoderasi Pengaruh Partisipasi Penganggaran Pada Budgetary Slack

2019 ◽  
pp. 2460
Author(s):  
I Putu Widhi Nugraha Putra Suherman ◽  
Luh Gede Krisna Dewi
Keyword(s):  
Organizational Performance ◽  
Sampling Method ◽  
Good Governance ◽  
Survey Method ◽  
Budgetary Slack ◽  
Analysis Technique ◽  
Budgetary Participation ◽  
The Relationship ◽  
Positive Effect

This study aims to determine the effect of budgeting participation on budgetary slack in the Regional Organization of Badung Regency with moderated variable compensation. The population in this study were authorized officials in budgeting, namely 38 Badung District OPD. Determination of samples in this study using purposive sampling method. Total number of respondents was 143 respondents. The data collection method used is the survey method. The data analysis technique used is moderation regression analysis. The results of this study indicate that budgetary participation has a positive effect on budgetary slack, and compensation can weaken the relationship between budgetary participation and budgetary slack. The results of this study are expected to be able to provide a view for the parties involved in budgeting in the Badung District OPD so that decision making and policy determination in the future can minimize budgetary slack, improve organizational performance, and create good governance. Keywords: Budgeting participation, compensation, budgetary slack

scholarly journals Studi Kandungan Bahan Organik Pada Beberapa Muara Sungai Di Kawasan Ekosistem Mangrove, Di Wilayah Pesisir Pantai Utara Kota Semarang, Jawa Tengah

2017 ◽  
Vol 6 (1) ◽  
pp. 29
Author(s):  
Endang Supriyantini ◽  
Ria Azizah Tri Nuraini ◽  
Anindya Putri Fadmawati
Keyword(s):  
Organic Matter ◽  
Chemical Oxygen Demand ◽  
Biochemical Oxygen Demand ◽  
Sampling Method ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Sample Survey ◽  
Survey Method ◽  
Total Organic Matter

Bahan organik adalah kumpulan senyawa - senyawa organik kompleks yang telah mengalami proses dekomposisi oleh organisme pengurai, baik berupa humus hasil humifikasi maupun senyawa-senyawa anorganik hasil mineralisasi. Bahan organik merupakan sumber nutrient yang penting, yang sangat dibutuhkan oleh organisme laut. Penelitian ini bertujuan untuk menganalisis parameter kandungan bahan organik meliputi BOD5 (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Suspended Solid) dan TOM (Total Organic Matter) dan menentukan tingkat pencemaran bahan organik berdasarkan baku mutu pada beberapa muara sungai di kawasan ekosistem mangrove, di wilayah pesisir pantai Utara Kota Semarang. Penelitian ini dilaksanakan pada bulan April 2015. Metode yang digunakan dalam penelitian ini adalah metode deskriptif, sedangkan penentuan lokasi penelitian menggunakan metode purposive sampling method dan untuk pengambilan sampel air menggunakan metode sample survey method. Hasil penelitian menunjukan bahwa kandungan parameter bahan organik selama penelitian di semua lokasi adalah BOD (3,77 – 15,13 mg/L), COD (20,33 – 140,67 mg/L), TSS (1,33 – 13,67 mg/L), TDS (818,33 – > 2.000 mg/L) dan TOM (10,73 – 50 mg/L). Secara umum kandungan COD dan TSS di Maron dan Trimulyo sudah melewati ambang batas baku mutu menurut Keputusan Menteri Negara Kependudukan dan Lingkungan Hidup Nomor 2 Tahun 1988 tentang Baku Mutu Air Limbah, sedangkan untuk kandungan BOD, TSS dan TOM belum melampaui ambang batas baku mutu yang telah ditetapkan oleh Keputusan Menteri Negara Lingkungan Hidup Nomor 51 Tahun 2004.

scholarly journals ANALISIS USAHATANI KANGKUNG (Ipomoea aquatica Forsk) DI DESA KAIMA KECAMATAN KAUDITAN KABUPATEN MINAHASA UTARA

2018 ◽  
Vol 13 (3A) ◽  
pp. 407
Author(s):  
Pedro R. P. Hutahaean ◽  
Mex L. Sondakh ◽  
Theodora M. Katiandagho
Keyword(s):  
Sampling Method ◽  
Secondary Data ◽  
Agricultural Extension ◽  
Primary Data ◽  
Survey Method ◽  
Selling Price ◽  
Land Area ◽  
Water Spinach ◽  
Ipomoea Aquatica

This study aims to analyze how the income of water spinach farmers (Ipomoea aquatica Forsk). This research was conducted in Kaima Village, Kauditan District, North MinahasaRegency and lasted from April 2016 until October 2017. The research method used in this research is survey method by interview all farmers of kangkung. Data collection method in this research is to use primary data through prepared list of questions that are obtained through direct interviews with farmers and secondary data from related agencies such as Head of Village Office, Statistic and Agricultural Extension Offices. Sampling method is the determination of saturated samples means that all water spinach farmers are used as a sample much as 6 respondents. The concept of measurement of variables in this study is the production, land area, selling price, revenue, expenditure, and supporting variables. Analysis of data used is the data obtained are presented in table form and analyzed descriptively. The results showed that the income of kangkung farming in Kaima Village, Kecamatan.Kauditan was beneficial.

scholarly journals KELAYAKAN USAHATANI KEDELAI DI LAHAN DARAT DAN LAHAN SAWAH

2019 ◽  
Vol 5 (2) ◽  
pp. 346
Author(s):  
Rian Kurnia ◽  
Trisna Insan Noor ◽  
Eliana Wulandari ◽  
Meddy Rachmadi
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Secondary Data ◽  
Paddy Fields ◽  
Primary Data ◽  
Survey Method ◽  
A Value ◽  
Cluster Random Sampling

This study aims to determine the feasibility of Soybean farming in dryland and paddy fields land in the Jatiwaras Subdistrict, Tasikmalaya Regency. The method used in this study is the survey method, while the data used consists of primary data and secondary data. Determination of sample farmers using the multistage cluster random sampling method. The number of respondents was taken as many as 36 farmers who were divided by farmers on 21 farmers on dryland and 15 farmers on wetland. The results of this study indicate that soybean farming in dryland is more feasible to cultivate with a value of R/C 1.98 while the value of R / C in wetland is 1.62.

scholarly journals Saluran Distribusi Dan Penetapan Harga Sayuran Pada Pedagang Besar Dan Pedagang Pengecer Kota Banda Aceh

2018 ◽  
Vol 3 (4) ◽  
pp. 237-248
Author(s):  
Dani Gunawan ◽  
Ismayani Ismayani ◽  
Romano Romano
Keyword(s):  
Sampling Method ◽  
Distribution Channel ◽  
Distribution Channels ◽  
Research Area ◽  
Survey Method ◽  
Strong Connection ◽  
Marketing Costs ◽  
The City ◽  
Banda Aceh

Abstrak,Saluran distribusi adalah lembaga-lembaga distributor atau lembaga-lembaga penyalur yang mempunyai kegiatan untuk menyalurkan atau menyampaikan barang-barang atau jasa-jasa dari produsen ke konsumen. Penelitian ini bertujuan untuk mengetahui ketergantungan penetapan harga sayuran terhadap saluran distribusi pada pedagang besar dan pedagang pengecer kota Banda Aceh. Metode yang digunakan dalam penelitian ini adalah metode survey, disebabkan banyaknya pedagang maka penelitian ini dilakukan dengan metode pengambilan sampel yang mewakili populasi dan dilakukan sumber informasi yang dapat menggambarkan keadaan masyarakat didaerah penelitian. Hasil dalam penelitian ini adalah (1) X2hitung X2tabel dan α ≥ pvalue­ yang menunjukkan Ha diterima dan H0 ditolak, artinya saluran distribusi berpengaruh tidak nyata terhadap penetapan harga. (2) Contigency coefficient (r) memiliki hasil 0,707 yang berarti saluran distribusi memiliki keterkaitan yang kuat dengan penetapan harga sayuran pada pedagang besar dan pedagang pengecer di Kota Banda Aceh. (3) Biaya pemasaran pedagang besar lebih besar dibandingkan biaya pemasaran pedagang pengecer, yaitu masing-masing Rp.46.307.200/tahun dan Rp.41.250.000/tahun.(Distribution Channel And Determination Of Vegetable Prices In Wholesaller And Retailers In Banda Aceh City)Abstact, Distribution channels are distributor institutions or channeling institutions that have activities to distribute or deliver goods or services from producers to consumers. This study aims to determine the dependence of vegetable pricing on distribution channels on wholesalers and retailers in the city of Banda Aceh. The method used in this study is a survey method, due to the large number of traders so this study was conducted with a sampling method that represents the population and carried out information sources that can describe the condition of the community in the research area. The results in this study are (1) X2count X2 table and α ≥ pvalue ¬ which shows that Ha is accepted and H0 is rejected, meaning that the distribution channel has no significant effect on pricing. (2) Contigency coefficient (r) has a result of 0.707 which means that the distribution channel has a strong connection with the determination of vegetable prices at wholesalers and retailers in the city of Banda Aceh. (3) The marketing costs of wholesalers are greater than the marketing costs of retailers, namely Rp.46,307,200 / year and Rp.41,250,000 / year.

scholarly journals The possibility of using Lake Rawa Pening as a source of drinking water

2019 ◽  
Vol 41 (1) ◽  
pp. 111-119
Author(s):  
Agatha Piranti ◽  
Gentur Waluyo ◽  
Diana R.U.S. Rahayu
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Government Regulation ◽  
Oxygen Demand ◽  
First Grade ◽  
Quality Standard ◽  
Quality Parameters ◽  
Polluted Water ◽  
Survey Method

Abstract The water of Lake Rawa Pening is used as a source of drinking water. Indonesian Government Regulation Number 82 of 2001 on Management of Water Quality and Water Pollution Control stated that the water quality of Lake Rawa Pening should meet the quality standard of first grade and be categorized as no polluted water. The purpose of this research was to assess the water quality based on Indonesian regulation and to assess water quality based on international regulations. The quality of water was assessed using a survey method in 7 sites of the Lake Rawa Pening 3 times for 3 months. Parameters measured were all the water quality parameters required in accordance with Government Regulation No. 82 of 2001. The results indicated that there were 13 values that exceeded the water quality standard of first grade. These exceeded parameters were total suspended solids (TSS), biological oxygen demand (BOD), chemical oxygen demand (COD), orthophosphate (PO4), NO3, As, Se, Cd, Mn, Cu, Pb, H2S, faecal coliform, and total coliform. Water quality status of Lake Rawa Pening was categorized as heavily polluted. The water quality of Lake Rawa Pening should be improved by reducing the pollutants entering the lake by restriction of human activities causing lake pollution.

scholarly journals RELATIONSHIP OF NITRATE AND PHOSPHATE CONCENTRATION ON PHYTOPLANKTON PRIMARY PRODUCTIVITY IN DUMAI RIVERS OF RIAU PROVINCE

2021 ◽  
Vol 4 (1) ◽  
pp. 54-64
Author(s):  
Syafrizal ◽  
Irvina Nurrachmi ◽  
Efriyeldi Efriyeldi
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Phosphate Concentration ◽  
Coefficient Of Determination ◽  
Survey Method ◽  
Research Station ◽  
Mathematical Equation ◽  
Relationship Of ◽  
The Relationship

This research was conducted in January 2020 in the waters of the Sembilan Dumai River which aims to determine the concentration of nitrate and phosphate on the primary productivity of phytoplankton. The research method used in this research is the survey method while the determination of the research station was done by technic purposive sampling. The results showed that the average nitrate concentration ranged from 0.0194 - 0.0749 mg/l and the average phosphate concentration ranged from 0.1452 - 0.8502 mg/l. There are 6 classes of phytoplankton found in the waters of the Sembilan Dumai River, namely Bacillariophyceae, Cocinodiscophyceae, Chroococcophyceae, Cyanophyceae, Cyanobacteria and Xanthophyceae. The results of phytoplankton abundance calculations ranged from 74.07 - 280.09 Ind/L. The primary productivity value of phytoplankton for gross primary productivity ranged from 62.5 - 104.16 mgC/m2/jam, respiration values ​​ranged from 20.83 - 41.66 mgC/m2/jam and the net primary productivity value ranged from 41.67 - 72.91 mgC/m2/jam. The results of the multiple linear regression test for the relationship between nitrate and phosphate on the primary productivity of phytoplankton at each station are shown by the mathematical equation Y = 60.18 + (-233,19,35) x and Y = 60.18 + 30.44x with the coefficient of determination ( R2) = 0.140 and (R2) = 0.226 and the correlation coefficient (r) = 0.631, the mathematical equation states that the relationship between nitrate and phosphate on the primary productivity of phytoplankton is strong.

scholarly journals PENGARUH PASTISIPASI MANAJEMEN DAN KEPUASAN PENGGUNA TERHADAP EFEKTIVITAS PENGGUNAAN SISTEM INFORMASI AKUNTANSI DI LPD KECAMATAN UBUD

2020 ◽  
Vol 2 (2) ◽  
pp. 47-54
Author(s):  
Ni Made Kansa Dewi Putri ◽  
Ni Luh Putri Srinadi
Keyword(s):  
Information Systems ◽  
User Satisfaction ◽  
Sampling Method ◽  
Accounting Information ◽  
Survey Method ◽  
Accounting Information Systems ◽  
Interview Method ◽  
Management Participation ◽  
Observation Method

The purpose of this study was to analyze the effect of management participation and user satisfaction on the effectiveness of using accounting information systems. This research was conducted in the LPD Sub-district of Ubud, using the observation method, interview method, the literature method, the documentation method, and the survey method by distributing questionnaires to LPD employees in the Sub-district of Ubud, with a population of 263 employees. Determination of the sample using non-probability sampling method with purposive sampling method. The research sample consisted of 87 employees. Data analysis uses Multiple Linear Regression. The results showed that management participation and user satisfaction had a positive and significant effect on the effectiveness of the use of accounting information systems in LPD in Ubud Gianyar, which means that the higher the management participation, the more effective the use of accounting information systems, vice versa and the higher the ability of satisfaction users will increase the effectiveness of using accounting information systems, and vice versa.

scholarly journals ANALISIS MARKET SEGMENTATION, TARGETING, DAN POSITIONING TRANSPORTASI ONLINE GRAB DI KOTA BOGOR (STUDI KASUS PADA MAHASISWA UNIVERSITAS PAKUAN)

2019 ◽  
Vol 4 (2) ◽  
pp. 81-96
Author(s):  
Herdiyana Herdiyana ◽  
Salmah Salmah
Keyword(s):  
University Students ◽  
Market Segmentation ◽  
Sampling Method ◽  
Sampling Technique ◽  
Survey Method ◽  
Cluster Sampling ◽  
Target Market ◽  
Transportation Service ◽  
Descriptive Survey

This research aim is to find out the segmenting, targeting, and positioning on online transportation Grab in Bogor City by using Pakuan University students as the research sample. This research uses descriptive survey method to researches the phenomenon about online transportation service and learns various relevant aspects with segmenting, targeting and positioning. The population of the researhes is 14.138 student of Pakuan University and 389 students were taken as the sample. The sampling method uses probability sampling with proportional cluster sampling technique, the determination of the number of samples using the Slovin method. The results of this research shows the segmentation from online transportation Grab in Bogor City which is from West Bogor, used by most female, having home lifestyle, and having extrovert personality. The reason using Grab is for travelling and looking for convenience and paying the cheap price compared with the competitors. Grab users know that Grab having promos through Grab application. Loyalty Grab users are included in enough loyal category. Target market from Grab is selective specialization, on this market pattern, Grab enters a number of market segmentation by offering different products. And for this thing Grab enters segmentation as a transportation tool and also as goods delivery service. Grab positioning is to make their brand staying in consumer’s mind from usage side, which is as a transportation tool and service that provides convenience, comfort, safe, and fast.

Sign in / Sign up

Export Citation Format

Share Document