Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

International Journal of Agriculture System

ijas
Website

Published by Universitas Hasanuddin

ISSN : 23379782 EISSN : 25806815 DOI : http://dx.doi.org/10.20956/ijas.v5i2.1236

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

International Journal of Agriculture System (Int. J. Agr. Syst.- IJAS) is published by Hasanuddin University (UNHAS) twice a year in June and December. This journal is an academic, citation indexed, and blind peer-reviewed journal. It covers original research articles, short notes and communications, reviews (including book), concepts, commentaries, and letters on a diverse topic related to agricultural systems including forestry, fishery/marine, and animal sciences. The aims of this journal are to provide a venue for academicians, researchers, and practitioners to share/discuss theories, views, research results, on issues related to the science, engineering and technology, and humanities in agriculture development, management, and issues in agricultural systems, particularly in the tropics. However, any other articles related to non-tropical agricultural systems are also welcome.

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)

Articles 5 Documents

Search results for , issue "VOLUME 3 ISSUE 2, DECEMBER 2015" : 5 Documents clear

Resiliency of Singkil Coastal Vegetation due to Natural Catastrophes Onrizal Onrizal; Mashhor Mansor; Nurdin Sulistiyono
International Journal of Agriculture System VOLUME 3 ISSUE 2, DECEMBER 2015
Publisher : Hasanuddin University

Aceh Singkil west coast of Northern Sumatra was affected by natural catastrophes both tsunami and coastal deformation. Apparently most of the inter-tidal vegetation communities suffered because of the inundation intensity and duration changed. Investigation was carried on the structure and composition of littoral and mangrove forests in Singkil coast for 52 and 49 months after the 2004 and 2005 natural catastrophes, respectively. In each vegetation type, data were collected from four sampling plots, each measuring 30 m x 30 m. The sampling plots were separated into 10 m x 10 m sub-plots for matured trees and 5 m x 5 m sub-plots for smaller trees or shrubs. All plants within the subplots were identified and counted. Pure stand of littoral forests were dominated by Casuariana equisetifolia in the mature stage and Cerbera manghas in regeneration stages as natural regeneration. In the mangrove area, most of the mangrove trees such as Bruguiera gymnorrhiza, B. parviflora, and Rhizophora apiculata dead. Sonneratia caseolaris was higher survival rate compared than mangrove trees. B. gymnorrhiza seedlings were growing well. Mangrove palm Nypa fruticans populations were recorded growing well and with a good resiliency and persistence. In fact some of coastal vegetations both in coastal dry lands and in wetland forests have a good capacity to naturally restore and grow after the environmental destruction. From ecological point of view, these plant species should be selected for rehabilitation program in the natural catastrophes both tsunami and coastal subsidence as the impact of large earthquake could be reduced.

Reproduction Performances of Mud Crab (Scylla olivacea) Broodstocks with Different Feeds Herlinah Herlinah; Early Septiningsih
International Journal of Agriculture System VOLUME 3 ISSUE 2, DECEMBER 2015
Publisher : Hasanuddin University

Broodstock maturation diets is important research in order to increase the reproduction performance of spawning females. This research was conducted to determine the appropriate feed for mud crab broodstock spawned and as information in support of efforts to provide quality stem in a controlled manner. The study was conducted at the Installation Research Marana Institute For Coastal Aquaculture (RICA). The test animals that used were 15 ind. mud crab broodstock having of size 200±15 g, carapace length 6±0,5cm, carapace width 12±0,5 cm with gonadal maturity level (TKG I) obtained from crab fishing locations. Research using completely randomized design which consists of 3 treatments and 5 replications. The treatments tested were: A (trash fish), B (squid) and C (golden apple snail). Variable measured were the rate of gonadal maturity, egg diameter, the degree of spawning, embryo incubation period, the number of larvae, hatching rate, larval amino acid and proximate analyze content and water quality variables. The results of proximate analyze showed that trash fish have the highest fat content (7.85 %) while the squid had a high protein content (73.72 %). Amino acids contained in squid is alanine, cystine, and leucine are thought to have an important role in the maturation of the gonads crab. The feed squid gives the best performing for mud crab S.olivacea broodstockin the achievement of gonadal maturity stage, fecundity and hatching rate.

Analysis of Determinant Indonesian Tuna Fish Competitiveness in Japanese Market Sri Hidayati; Dwidjono H. D; Masyhuri Masyhuri; Kamiso H. N
International Journal of Agriculture System VOLUME 3 ISSUE 2, DECEMBER 2015
Publisher : Hasanuddin University

Japan is the main market of Indonesian tuna exports, either the world’s largest tuna market, even so the competition level is high. This condition has made it as the main point for Indonesia to be able to compete it’s tuna in the global market. The research used time series data of world’s tuna’s import and export in 1982-2012 from UN Comtrade and Indonesia Ministry of Maritime Affairs and Fisheries. Data were analyzed to measure market share (MS), Revealed Symmetric Comparative Advantage (RSCA), Trade Specialist Ratio (TSR), while the determinant (factors) of competitiveness employed simultaneous equations. The results showed that: (1) The average market share of Indonesian tuna in the Japanese market was 25.20%, (2) Indonesia tuna have a high competitiveness and it growth to maturity, (3) Quality and trust is a decisive determinant (factor) of Indonesian tuna competitiveness in the Japanese market.

Understanding the Objectives of Pigs Farming Development in Arfak Tribe Farmers, West Papua Deny A. Iyai; Bernadin Gobay; Alexander Yaku
International Journal of Agriculture System VOLUME 3 ISSUE 2, DECEMBER 2015
Publisher : Hasanuddin University

The multifunction of pigs for the Papuan are divergences and interelated. This study was aimed to seek the objectives of keeping pigs by Arfak tribe and to find the trend relationships of economical and socio-cultural components determining the development of pig farming systems in Manokwari. A one-month field research was done at Manokwari Barat district. Quiztionaire was the tool used to record and collect the data. Snowball method was applied to chose the pig farmer participants and 60 respondents were participated. Several variables were quantified to measure the percentages of socio-cultural and economicalobjectives. The finding shown that income generation, savings barter were the subsequent components shaping the economic objectives and while organic fertilizer and biofertilizer resulted from manure were not applied yet. Although dung was frequently produced and spreaded at the pig house and around backyard. Socio-culture was done in the means of merrital prices, peaceness, gift and parties, respectively. The other findings were that the alternation of pig development indicated by herd size had positive relationship with the two motives. Similar relationship was shown by number of aided farmers. Hence, the changes of pig farming systems, e.g. extensive to semi-intensive and/or intensive to semi-intensive had shown weak relationship.

Effect of Wetland Degradation and Conversion on Carbon Stock: The Case of Tekuma Wetland, Lake Tana Sub-Basin, Ethiopia Yohannes Afework Kassa; Belayneh Ayele Anteneh; Temesgen Tilahun Teshome
International Journal of Agriculture System VOLUME 3 ISSUE 2, DECEMBER 2015
Publisher : Hasanuddin University

Wetlands are considered as one of the major carbon sinkers that have significant positive effect on reducing the impact of climate change. However, the contribution of wetland to climate change mitigation through carbon sequestration is not well understood by the public. Many developed and developing countries signed in and supported the inclusion of agriculture and wetland projects in the Kyoto Protocol. But Ethiopian government has not yet tried to take advantage of this opportunity and start negotiations to use conservation and improvement of wetland’s carbon sequestration potential in the country to obtain carbon funds as an economic incentive for the communities involved. With this background, this research was designed to carry out an in-depth study on the impact of wetland degradation and conversion on carbon sequestration potential in Ethiopia. To meet the stated objectives stratified sampling techniques were used to select sampling sites from the wetland areas having varying wetland degradation level. For the determination of carbon levels in each area replicates of plant and soil samples were collected. The plant organic matter was determined using a loss-on-ignition method and then converted to carbon stock. Carbon stock and bulk density of the sampled soil was determined using Walkely-Black oxidation and gravimetric methods, respectively. ANOVA and mean separation were computed to indicate whether there is significant difference in carbon stock due to wetland degradation. The research findings showed significant difference (P<0.05) of carbon storage with different wetland degradation levels. Carbon stock in the soil was on average 24 times higher than carbon stock in plants in each respective wetland area having varying degradation level. The intact wetland was able to sequester579 t/ha of CO2as compared to converted farmlands and grazing lands that had only 230 and 295 t/ha of CO2, respectively. The result showed that by protecting wetlands more than double carbon could be stored as compared to grazing and farmlands. Thus, it is recommended that special attention should be given to minimize the conversion of wetlands and maximize their benefits through carbon funding.

Page 1 of 1 | Total Record : 5

Filter by Year

2015 2015

Filter By Issues

All Issue VOLUME 13 ISSUE 1, JUNE 2025 VOLUME 12 ISSUE 2, DECEMBER 2024 VOLUME 12 ISSUE 1, JUNE 2024 VOLUME 11 ISSUE 2, DECEMBER 2023 VOLUME 11 ISSUE 1, JUNE 2023 VOLUME 10 ISSUE 2, DECEMBER 2022 VOLUME 10 ISSUE 1, JUNE 2022 VOLUME 9 ISSUE 2, DECEMBER 2021 VOLUME 9 ISSUE 1, JUNE 2021 VOLUME 8 ISSUE 2, DECEMBER 2020 VOLUME 8 ISSUE 1, JUNE 2020 VOLUME 7 ISSUE 2, DECEMBER 2019 VOLUME 7 ISSUE 1, JUNE 2019 VOLUME 6 ISSUE 2, DECEMBER 2018 VOLUME 6 ISSUE 1, JUNE 2018 VOLUME 5 ISSUE 2, DECEMBER 2017 VOLUME 5 ISSUE 1, JUNE 2017 VOLUME 4 ISSUE 2, DECEMBER 2016 VOLUME 4 ISSUE 1, JUNE 2016 VOLUME 3 ISSUE 2, DECEMBER 2015 VOLUME 3 ISSUE 1, JUNE 2015 VOLUME 2 ISSUE 2, DECEMBER 2014 VOLUME 2 ISSUE 1, JUNE 2014 VOLUME 1 ISSUE 2, DECEMBER 2013 VOLUME 1 ISSUE 1, JUNE 2013 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Ahsan Yunus

Contact Email
ahsanyunus@unhas.ac.id

Phone
-

Journal Mail Official
ijas@unhas.ac.id

Editorial Address
Graduate School 2nd Floor, Room 202, Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10, Tamalanrea, Makassar, 90245, South Sulawesi, Indonesia.

Location
Kota makassar,

Sulawesi selatan

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Ahsan Yunus

Contact Email ahsanyunus@unhas.ac.id

Phone -

Journal Mail Official ijas@unhas.ac.id

Editorial Address Graduate School 2nd Floor, Room 202, Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10, Tamalanrea, Makassar, 90245, South Sulawesi, Indonesia.

Location Kota makassar, Sulawesi selatan INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Ahsan Yunus

Contact Email
ahsanyunus@unhas.ac.id

Phone
-

Journal Mail Official
ijas@unhas.ac.id

Editorial Address
Graduate School 2nd Floor, Room 202, Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10, Tamalanrea, Makassar, 90245, South Sulawesi, Indonesia.

Location
Kota makassar,

Sulawesi selatan

INDONESIA