cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Slamet Sutriswanto
Contact Email
jurnalijas@gmail.com
Phone
-
Journal Mail Official
pustaka@litbang.deptan.go.id
Editorial Address
-
Location
Kota adm. jakarta selatan,
Dki jakarta
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 5 Documents
 1 
Search results for , issue " Vol 12, No 1 (2011): April 2011" : 5 Documents clear
GENESIS AND PROPERTIES OF PEAT AT TOBA HIGHLAND AREA OF NORTH SUMATRA Prasetyo, Bambang Hendro; Suharta, Nata
Indonesian Journal of Agricultural Science Vol 12, No 1 (2011): April 2011
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In Indonesia, peat soil in the highland area is only found in the plateau of Toba Highland, North Sumatra, and its morphologi-cal, physical, and chemical properties have been studied. Four profiles of peat soil were made in the field and eighteen samples were taken and analyzed in laboratory. Most of the properties of highland peat were similar with lowland peat. The differences were in their Al saturation, P retention, and andic soil properties. High Al saturation was resulted from weathering of primary minerals under the acid condition. Andic soil properties were caused by amorphous materials resulted from weathering of volcanic materials in the peat, and P retention was related with the presence of amorphous materials. Phosphate retention of the highland peat was classified high (>60%) and positively correlated with amorphous materials. The presence of amor-phous materials was confirmed by ammonium oxalate extract-able Alo+½Feo. The presence of andic soil properties in the highland peat created problem in their classification. To provide a place for andic soil properties that influence the P retention in the highland peat soil, the soil classification of peat soil should be modified by adding andic modifier at subgroup level.
LABORATORY AND FIELD EVALUATION OF ESSENTIAL OILS FROM Cymbopogon nardus AS OVIPOSITION DETERRENT AND OVICIDAL ACTIVITIES AGAINST Helicoverpa armigera Hubner ON CHILI PEPPER Setiawati, Wiwin; Murtiningsih, Rini; Hasyim, Ahsol
Indonesian Journal of Agricultural Science Vol 12, No 1 (2011): April 2011
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The fruit borer (Helicoverpa armigera Hubner) is one of the key pests of chili pepper in Indonesia. Yield loss due to this insect pest may reach up to 60%. Chemical treatment for con-trolling this insect pest is ineffective and eventually leads to environmental pollution. More environmentally safe insecticides are developed based on natural plant ingredients as their active compound such as essential oils. This study aimed to assess the potential of citronella oil for managing H. armigera on chili pepper. The experiments were conducted at the Indonesian Vegetables Research Institute from April 2009 to March 2010 and in Cirebon, West Java from November 2009 to March 2010. A field experiment was designed in a randomized complete block design with five treatments and replicated five times. Citronella oil was extracted by steam distillation from Cymbo-pogon  nardus. The oil was then chemically characterized by using GC-MS and its efficacy (ovicidal and feeding deterrent) against H. armigera was tested both in laboratory and field conditions. The GC-MS result showed that major chemical compounds of the citronella oil used were citronella (35.97%), nerol (17.28%), citronellol (10.03%), geranyle acetate (4.44%), elemol (4.38%), limonene (3.98%), and citronnellyle acetate (3.51%). The laboratory experiment revealed that the highest concentration (4,000 ppm) of citronella oil reduced egg laying by 53-66%. Ovicidal activity was concentration dependent, and egg hatchability decreased by 15-95% compared to control. The field experiment showed that treatment of citronella oil at 2.0 mL L-1 significantly reduced fruit damage by H. armigera similar to the plots treated with spinosad at the recommended dose (60 g ai ha-1). Application of citronella oil significantly reduced fruit damage by 72% and increased quality of the chili pepper. Because oviposition and feeding deterrent properties are key factors in controlling the pest, therefore this study revealed that citronella oil has potential to be incorporated into the controlling program of H. armigera on chili pepper.
CHARACTERIZING THE SOIL FOR IMPROVED NUTRIENT MANAGEMENT IN SELECTED MAIZE GROWING AREAS OF INDONESIA Fauzi, Achmad I.; Agus, Fahmuddin; Sukarman, Sukarman; Nugroho, Kusumo
Indonesian Journal of Agricultural Science Vol 12, No 1 (2011): April 2011
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The demand for maize, the second most important food crop in Indonesia, is steadily increasing. Knowledge of soil properties is a key element in developing nutrient management system. The aims of this study were to characterize and classify the soils at the family level of Soil Taxonomy and linking the taxa with nutrient management systems. The study was conducted at the Site Specific Nutrient Management (SSNM) for maize in Indonesia from June to October 2005. Eight soil profiles were taken from Karo (North Sumatra), Sidomulyo (Lampung), Wonogiri and Grobogan (Central Java), Wonokerto, Mojoayu, and Tuban (East Java), and Jeneponto (South Sulawesi). The soil samples were analyzed for their physical, chemical, and mineralogical characteristics. Soil profile description followed the Standard Guidelines of the Food and Agriculture Organiza-tion. Results showed that the sites for the SSNM represented a wide range of soils and climate characteristics from Entisols with 1,050 mm annual rainfall in Jeneponto to Oxisols with 2,200 mm annual rainfall in Lampung. Most soils had a fine texture class (clay and clay loam), but in places like Lampung and Wonogiri, the clay had a low activity leading to a low cation exchange capacity (CEC) and low exchangeable cations, especially K. The relatively high-K status soils were found in Karo, Grobogan, and Tuban sites. Organic matter and, in consequence, total N were relatively low for all SSNM sites. Available P status ranged from low to high. The low available P in Grobogan, Wonokerto, and Mojoayu soils seemed to be related to high pH, while in Lampung it was due to low pH. Exchangeable Ca and Mg were high in Grobogan, Mojoayu, Karo, and Tuban due to the presence of weatherable minerals such as hypersthene, augite, and hornblende. In general, this study suggests that organic matter, N, and P will be needed across the sites. K addition will be necessary for Karo, Lampung and Wonogiri, while in other SSNM areas, maintenance rates for K will be needed unless plant residues are recycled.
RESISTANCE EVALUATION ON POPULATIONS OF CROSSES BETWEEN TRANSGENIC POTATO KATAHDIN RB AND NON-TRANSGENIC ATLANTIC AND GRANOLA TO LATE BLIGHT (Phytophthora infestans) IN CONFINED FIELD TRIAL Ambarwati, Alberta Dinar; Herman, Muhammad; Purwito, Agus; Sumaraw, Sientje Mandang; Aswidinnoor, Hajrial
Indonesian Journal of Agricultural Science Vol 12, No 1 (2011): April 2011
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Late blight resistance gene (RB gene) isolated from Solanum bulbocastanum, is a broad resistance gene against all races of Phytophthora infestans. The gene was transformed into Katah-din event SP904 and SP951 using Agrobacterium tumefaciens and these transgenic plants have been crossed with susceptible potato cultivars Atlantic and Granola. Populations of the crosses have been molecularly characterized for the integration of the RB transgene. The study aimed to evaluate the resistance of the populations of crosses between transgenic Katahdin RB  and susceptible non-transgenic parents (Atlantic and Granola) to late blight in a confined field trial at Pasir Sarongge, Cianjur, West Java. A total of 84 clones originated from four popula-tions were evaluated for resistance to late blight. These included 22 clones of Atlantic x transgenic Katahdin SP904, 16 clones of Atlantic x transgenic Katahdin SP951, 19 clones of Granola x transgenic Katahdin SP904, and 27 clones of Granola x transgenic Katahdin SP951. Observations of the late blight infection were conducted when late blight symptoms were detected, i.e. at 56, 60, 63, 70, and 77 days after planting (DAP). The result showed there were high variations in the resistance level of all the 84 clones tested. Clones of crosses between susceptible parents (Atlantic or Granola) and resistant parents (transgenic Katahdin SP904 or Katahdin SP951) showed a similar pattern based on the area under disease progress curve (AUDPC) value, i.e. 377.2 greater than the AUDPC of the resistant parents (180.1), but smaller than that of the susceptible parents (670.7). Observation at 77 DAP resulted four resistant potato clones having resistance score of 7.0-7.6, higher than the transgenic parents Katahdin SP904 (4.6) and Katahdin SP951 (6.8), i.e. clone B8 (Atlantic x transgenic Katahdin SP951) with resistance score of 7.6 and clones B26 (Atlantic x transgenic Katahdin SP951), C183 (Granola x transgenic Katahdin SP904), and D89 (Granola x transgenic Katahdin SP951) with resistance score of 7. These four transgenic potato resistant clones need to be further developed as promising potato clones to late blight.
EVALUATION OF NUTRITION AND GLYCEMIC INDEX OF SWEET POTATOES AND ITS APPROPRIATE PROCESSING TO HYPOGLYCEMIC FOODS Astawana, Made; Widowati, Sri
Indonesian Journal of Agricultural Science Vol 12, No 1 (2011): April 2011
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Indonesia placed the fourth biggest diabetics in the world after India, China, and the USA with prevalence amounting to 8.6% of the population. Diabetes is an abnormal carbohydrate metabolism. Therefore, nutrition plays a key role in the management of the disease. This study aimed to find hypoglycemic sweet potatoes and appropriate processing to create low glycemic foods. Eight Indonesian sweet potato varieties/clones were used in this experiment, i.e. Kidal, Sukuh, Sari, Ungu, Jago, BB00105.10, B0464, and BB00106.18. Samples were firstly analyzed for their physicochemical and nutritional properties, which then followed by evaluation of their hypoglycemic responses. The selected variety was processed into three different basic processing methods, i.e. boiling, baking, and frying, and then their glycemic indexes (GI) were evaluated. Result showed that among eight sweet potato varieties/clones studied, BB00105.10 clone indicated the best hypoglycemic response. The highest hypoglycemic activity was supported with the highest resistant starch content (3.8%), protein content (5.47%), and low starch digestibility (51.4%). The sweet potato tubers contained medium to high amylose (24.94%). Processing methods influenced the GI value of foods. Fried sweet potatoes had the lowest GI (47), followed by the boiled one (GI = 62) and the baked one (GI = 80).

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2011 2011


Reset
Filter By Issues
All Issue Vol 22, No 2 (2021): DECEMBER 2021 Vol 22, No 1 (2021): JUNE 2021 Vol 21, No 2 (2020): DECEMBER 2020 Vol 21, No 1 (2020): June 2020 Vol 20, No 2 (2019): December 2019 Vol 20, No 1 (2019): June 2019 Vol 19, No 2 (2018): December 2018 Vol 19, No 1 (2018): June 2018 Vol 18, No 2 (2017): December 2017 Vol 18, No 1 (2017): June 2017 Vol 17, No 2 (2016): October 2016 Vol 17, No 1 (2016): April 2016 Vol 16, No 2 (2015): October 2015 Vol 16, No 1 (2015): April 2015 Vol 15, No 2 (2014): October 2014 Vol 15, No 2 (2014): October 2014 Vol 15, No 1 (2014): April 2014 Vol 15, No 1 (2014): April 2014 Vol 14, No 2 (2013): October 2013 Vol 14, No 2 (2013): October 2013 Vol 14, No 1 (2013): April 2013 Vol 14, No 1 (2013): April 2013 Vol 13, No 2 (2012): October 2012 Vol 13, No 2 (2012): October 2012 Vol 13, No 1 (2012): April 2012 Vol 13, No 1 (2012): April 2012 Vol 12, No 2 (2011): October 2011 Vol 12, No 2 (2011): October 2011 Vol 12, No 1 (2011): April 2011 Vol 12, No 1 (2011): April 2011 Vol 11, No 2 (2010): October 2010 Vol 11, No 2 (2010): October 2010 Vol 11, No 1 (2010): April 2010 Vol 11, No 1 (2010): April 2010 Vol 10, No 2 (2009): October 2009 Vol 10, No 2 (2009): October 2009 Vol 10, No 1 (2009): April 2009 Vol 10, No 1 (2009): April 2009 Vol 9, No 2 (2008): October 2008 Vol 9, No 2 (2008): October 2008 Vol 9, No 1 (2008): April 2008 Vol 9, No 1 (2008): April 2008 Vol 8, No 2 (2007): October 2007 Vol 8, No 2 (2007): October 2007 Vol 8, No 1 (2007): April 2007 Vol 8, No 1 (2007): April 2007 Vol 7, No 2 (2006): October 2006 Vol 7, No 2 (2006): October 2006 Vol 7, No 1 (2006): April 2006 Vol 7, No 1 (2006): April 2006 Vol 6, No 2 (2005): October 2005 Vol 6, No 2 (2005): October 2005 Vol 6, No 1 (2005): April 2005 Vol 6, No 1 (2005): April 2005 Vol 5, No 2 (2004): October 2004 Vol 5, No 2 (2004): October 2004 Vol 5, No 1 (2004): April 2004 Vol 5, No 1 (2004): April 2004 Vol 4, No 2 (2003): October 2003 Vol 4, No 2 (2003): October 2003 Vol 4, No 1 (2003): April 2003 Vol 4, No 1 (2003): April 2003 Vol 3, No 2 (2002): October 2002 Vol 3, No 2 (2002): October 2002 Vol 3, No 1 (2002): April 2002 Vol 3, No 1 (2002): April 2002 Vol 2, No 2 (2001): October 2001 Vol 2, No 2 (2001): October 2001 Vol 2, No 1 (2001): April 2001 Vol 2, No 1 (2001): April 2001 Vol 1, No 2 (2000): October 2000 Vol 1, No 1 (2000): April 2000 More Issue