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Ahsan Yunus
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Graduate School 2nd Floor, Room 202, Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10, Tamalanrea, Makassar, 90245, South Sulawesi, Indonesia.
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International Journal of Agriculture System
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
 1 
Search results for , issue "VOLUME 8 ISSUE 1, JUNE 2020" : 5 Documents clear
Genetic Diversity of Duabanga moluccana Blume from Two Provenances in West Nusa Tenggara Revealed by Microsatellite markers Siti Halimah Larekeng; Yusniar Yusniar; Muh Restu; Rismawati Rismawati; Yuni Fitri Cahyaningsih; Mirza Arsiaty Arsyad; Arif Nirsatmanto
International Journal of Agriculture System VOLUME 8 ISSUE 1, JUNE 2020
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1142.656 KB) | DOI: 10.20956/ijas.v8i1.2213

Abstract

Duabanga moluccana Blume, locally known as Rajumas, is a tree species that suitable for building materials, pulp, and plywood. The information about genetic diversity is required for the conserving of this species. Here, we elucidated the genetic diversity of D. moluccana from two provenances in West Nusa Tenggara, Indonesia. Four microsatellite markers successfully amplified 12 randomly selected samples and produced polymorphic DNA bands. Those primers were DMAG10, DMAG09, DMACAG01 and DMTCAC11. High genetic diversity was detected in the populations with 0.54 of mean expected heterozygosity (He). The genetic variation among individuals was 100%, whereas there were no genetic variations among populations and within individuals
Advantages of Hybrid Corn Seed Production Compared to Corn Grain Bahtiar Bahtiar; B Zanuddin; M Azrai
International Journal of Agriculture System VOLUME 8 ISSUE 1, JUNE 2020
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.628 KB) | DOI: 10.20956/ijas.v8i1.2327

Abstract

Corn seed breeders are indispensable in the supply of superior hybrid corn seeds.  Its ability to produce seeds is evaluated for their superiority compared to the production of corn grain yield. A study was conducted in Jatirogo District, Tuban Regency, East Java province in July to December 2019. Involving farmers cooperator implementing hybrid corn seed production in the area of 96 ha and non cooperator farmers who produce the corn grain yield in the same location.  We observed the variables:  cost of production, yield and farmers income. Data and information were analyzed by Benefit Cost Ratio (B/C) and Marginal Benefit Cost Ratio (MBCR). The results showed that farmers who produced hybrid corn seeds of Nasa-29 variety (cooperators) were able to produce 4.6 t/ha of wet cobs with an income of IDR. 19,470,000/ha, while farmers who produced   grain corn of 7.9 t/ha with an income of IDR. 15,943,000/ha.  MBCR analysis showed that, the switching is able to added the farmer income Rp.4,100 for every use cost Rp.1,000 as long as the seed procurement policy remains unchanged and related institutions continue to provide support.
Formulation of Bacillus and Azotobacter Consortia in Liquid Cultures: Preliminary Research on Microbes-Coated Urea Reginawanti Hindersah; Mieke Rochimi Setiawati; Priyanka Asmiran; Betty Natalie Fitriatin
International Journal of Agriculture System VOLUME 8 ISSUE 1, JUNE 2020
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (665.361 KB) | DOI: 10.20956/ijas.v8i1.2283

Abstract

The spore-forming Bacillus and cysts forming Azotobacter are Plant Growth Promoting Rhizobacteria which has been used as biofertilizer in sustainable agriculture since they tolerant to dried soil. Drought resistant microbes will be useful to coat urea in order to reduce the lost of nitrogen. The objectives of this preliminary study were to study the effect of molasse based liquid media on the population of Bacillus spore and Azotobacter vegetative cell and to determine the composition of four bacterial species in liquid formula. In the first experiment The Bacillus subtilis, B. megaterium, A. chroococcum and A. vinelandii were grown separately in 1% cane molasses enriched with 0.1% NH4Cl. As control treatment, The Bacillus and Azotobacter were grown in Nutrient Broth and Ashby’s mannitol broth respectively. In the second experiment, different composition of said Bacillus and Azotobacter were grown in molasses based liquid media prior to count the spore and vegetative cell. The results showed that molasses-based media supported bacterial growth and initial ratio 1:1:1:1 of liquid inoculant was effective to increase bacterial growth. This experiment suggested that the use of organic based media was useful practice of liquid biofertilizer formulation for granule urea coating.
The Economic Impact of COVID-19 Outbreak on the Agriculture Sector Dwia Aries Tina Pulubuhu; Andi Alimuddin Unde; Suwandi Sumartias; Sudarmo Sudarmo; Seniwati Seniwati
International Journal of Agriculture System VOLUME 8 ISSUE 1, JUNE 2020
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (334.705 KB) | DOI: 10.20956/ijas.v8i1.2337

Abstract

The COVID-19 pandemic in Indonesia began to be confirmed in early February 2020, it affects many various economic sectors, including agriculture. The COVID-19 created challenges for socio-economic issues. This short note focuses on the impact of COVID-19 outbreak on the agricultural sector. The COVID-19 outbreak had a wide-ranging impact, so that agricultural commodities continued to decline. The government's call to not leave the house resulted in many farmers not doing their activities so that it has an impact on declining farmers' income. The field officers also could not optimally carry out their work as a result the development of farming was not optimal. Various efforts have been made by the government to support the agricultural sector such as building e-marketing and training in processing yields for farmers.
The Strategy of Phytoplankton on Critical Conditions in Coastal Waters Rahmadi Tambaru; Muh. Farid Samawi; Khairul Amri
International Journal of Agriculture System VOLUME 8 ISSUE 1, JUNE 2020
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (333.548 KB) | DOI: 10.20956/ijas.v8i1.2272

Abstract

The productivity of phytoplankton found best in coastal waters is on a critical aquatic environmental condition for the life of phytoplankton (incubation time : 10.00-14.00). At that incubation time, the sun reached the apex of illumination (12.00). Theoretically, the best productivity is unlikely to happen because the activity of phytoplankton is not perfect. To answer that doubt, the research deals with the strategy of life phytoplankton on critical conditions in coastal waters. To achieve the desired results, multivariate analysis is used Correspondent analysis (CA) and Principal Components Analysis (PCA). The results showed that based on the analysis of Factorial Koresponde (CA), there were two grouping of phytoplankton  abundance. Group I showed that the grouping of phytoplankton  abundance of occurred at A depth of 10 m at the sampling  time A (10.00 : normal conditions). Group II occurs at a depth of 5 and 15 m at sampling time B (14.00: critical condition). Furthermore, the shift in grouping phytoplankton occurs at the sampling  time A at a depth of 10 m into the sampling time B in 5 m depth, not at at a depth of 0 m. This is due to the very strong sunlight intensity that can lead to death in the genera of phytoplankton that exist. It turns out that the strategy and the dynamics of phytoplankton abundance at critical time is not doing the grouping at the surface depth (0 m), but at a deeper depth (5 m) in order to keep the activity well done.

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