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INDONESIA
Indonesian Journal of Agricultural Science
Published by Kementerian Pertanian
ISSN : 1411982X     EISSN : 23548509     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
The journal publishes primary research articles from any source if they make a significant original contribution to the experimental or theoretical understanding of some aspect of agricultural science in Indonesia. The definition of agricultural science is kept as wide as possible to allow the broadest coverage in the journal. Accredited base on Director Decree of Indonesian Institute of Science No. 816/D/2009 with acreditation No. 172/AU1/P2MBI/08/2009. IJAS is newly accredited by the Indonesian Institute of Science in 2012 (No. 473/AU2/P2MI-LIPI/08/2012) for period of 2012-2015.
Arjuna Subject : -
Articles 4 Documents
 1 
Search results for , issue "Vol 1, No 2 (2000): October 2000" : 4 Documents clear
SEED AND POLLEN TTRANSMISSION OF A NEW UNIDENTIFIED MOTTLE DISORDER OF MAIZE IN INDONESIA W. Wakman; D.S. Teakle; R. Louie
Indonesian Journal of Agricultural Science Vol 1, No 2 (2000): October 2000
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v1n2.2000.p63-67

Abstract

A new unidentified mottle disorder of maize Indonesia was found at the Research Institute for Maize and Other Cereals (RIMOC), Maros, South Sulawesi in 1995. Attempts to identify the disorder were made by mechanical inoculation, insect vector (Rhopalosiphum maidis and Peregrinus maidis) transmission, seed and pollen transmission, electron microscopy, and serological test. Fifty seeds from each of 22 ears of Arjuna maize plants showing the disorder were planted and symptoms on the seedlings were recorder at 1, 2, and 3 weeks after planting. The percentage of seedlings showing the disorder ranged from 40 to 100. Pollen of affected Arjuna was then used to pollinate four sweet corn female flowers. Hybrid seeds (50 per ear) of the crosses were planted and symptoms were recorded at 1, 2, and 3 weeks after planting. The results showed that percentage of seedlings showing the disorder ranged from 22 to 84. Electron microscopy and ELISA tests on 15 viruses and one phytospiroplasma antiserum however, gave negative results. Therefore, maize disorder at Maros was not identical to any known viral disease of maize. It could be a genetical disorder and has been given the name maize mottle.
PERFORMANCE OF POTATOES GROWN FROM TRUE SEED UNDER DIFFERENT ENVIRONMENTAL CONDITIONS IN WEST JAVA Nikardi Gunadi; Paul M. Harris
Indonesian Journal of Agricultural Science Vol 1, No 2 (2000): October 2000
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v1n2.2000.p29-38

Abstract

True potato seed (TPS) has been considered as an alternative planting material of seed tuber in potato production, especially in developing countries where good quality of seed tuber at reasonable price is difficult to obtain. This study was conducted to investigate the effects of environment and genotype on potatoes grown from TPS in contrasting seasons and sites in West Java, Indonesia over a period of two years (September 1990-October 1992). Different method of establishing the potato crop from TPS were tested and compared with  ev. Granola established from seed tubers. Data were interpreted in terms of relationships between total and tuber dry matter yield and intercepted radiation (IR). The growth and yield of potatoes grown from TPS were generally better at higher rather than lower altitudes, probably related to the lower temperatures which was reflected in an increase in IR and in the efficiency of conversion of IR into total and tuber dry matter. In the highland, seedling transplants and seedling tubers were both suitable for establishing crops from TPS in the wet season, but not in the dry season. All progenies, in general performed well at the highland especially the medium-late maturing progenies such as HPS 7/13. Atlantic x LT-7 initiated tubers and matured more rapidly than the other progenies and performed well at the lower altitudes. Atzimba x DTO-28 had a more gradual decline in ground cover and was more resistant to late blight than other early-medium maturing progenies. The medium-late maturing progeny. Atzimba x R-128.6 matured later and performed poorly at the lower altitudes.
EMPOWERING WOMEN FARMERS THROUGHT MULTICHANNEL LEARNING: AN APPLICATION OF NEED ASSESSMENT TECHNIQUE Fawzia Sulaiman
Indonesian Journal of Agricultural Science Vol 1, No 2 (2000): October 2000
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v1n2.2000.p39-50

Abstract

The suitability and effectiveness of material, method, and media used in nonformal education provided by government and nongovernment institutions (including agricultural extension) has been questioned in recent years, this is especially true for nonformal education catering for poor women farmers. Even though the significant roles and contribution of woman farmers in farming and family economic survival in Indonesia have been widely known, their nonformal educations need are rarely acknowledged. Several socio-cultural norms and values hinder women farmers’ participation in extension activities. The perception that agricultural extension activities fall under public domain has resulted that these activities are under male control (usually head for household). Without special intervention and accurate need assessment for nonformal education, the gap between women farmers and their male counterparts will be wider. This study was designed to identify nonformal educational needs of poor women farmers in Sakra Subdistrict, East Lombok, West Nusa Tenggara. The primary data and information were solicited through the Participatory Rural Appraisal (PRA) method using focus group interviews and gender analysis techniques. The result indicated that women farmers in the study area could not afford to participate in learning activities, unless the learning program offer a direct benefit to generate income. However, in general they put a high expectation in their children’s education and learning opportunity that would lead them to earn a better income. Due to their very limited educational background, demonstration and learning by doing method where perceived to be the most effective extension methods. Furthermore, radio and television were not effective educational channels, since there were only a very small number of respondents who owned radio and TV sets. In the efforts to empower women farmers, field extension workers require training on socio-economics, including gender analysis, and need assessment methodology to better perform their tasks in the field.
EFFECT OF ALUMINUM ON PLANT GROWTH, PHOSPORUS AND CALCIUM UPTAKE OF TROPICAL RICE (Oryza sativa), MAIZE (Zea mays), AND SOYBEAN (Glycine max) D. Nursyamsi; M. Osaki; T. Tadano
Indonesian Journal of Agricultural Science Vol 1, No 2 (2000): October 2000
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v1n2.2000.p51-62

Abstract

Aluminum toxicity is the most limiting factor to plant growth on acid soils. Structural and functional damages in the root system by Al decrease nutrient uptake and lead to reduce plant growth and mineral deficiency in shoot. Greenhouse experiment was conducted to study the effect of Al on plant growth, and P and Ca uptake of rice, maize, and soybean. The plants were grown in hydroponic solution added with 0, 5, 10, and 30 ppm Al, at pH 4.0. The results showed that relative growth of shoots and roots of upland rice, lowland rice, maize, and soybean decreased with an increase of Al level. However, sometimes the low Al level (5 ppm) stimulated shoot and root growth of some varieties in these species. According to total AlRG30 values, which is Al concentration in solution when relative growth decreased to 50%, Al tolerance of species was in order of barley < maize < soybean < lowland rice < upland rice. For maize, Al tolerance was in the order of Arjuna < Kalingga < P 3540 < SA 5 < SA 4 < PM 95 A < SA 3 < Antasena; for soybean was Wilis < INPS < Galunggung < Kerinci < Kitamusume; for lowland rice was RD 23 < Kapuas < Cisadane < KDML 105 < IR 66 < RD 13, and for upland rice was Dodokan < JAC165 < Cirata < Orizyca sabana 6 < Danau Tempe < Laut Tawar. Based on the rank of Al tolerance, rice was the useful crop to be planted in acid soils. Antasena (maize), Kitamusume ( soybean ), RD 13 (lowland rice), and Laut Tawar (upland rice) were also recommended for acid soils. P and Ca concentration in shoots and roots commonly decreased with an increase of Al level. However, the low Al level stimulated absorption of P and Ca concentrations in shoots and roots.

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