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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) AGRITROP Jurnal Natur Indonesia Jurnal Teliska Jurnal AgroBiogen Planta Tropika Jurnal Ampere Jurnal Penelitian Karet JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Jurnal Penelitian Pertanian Tanaman Pangan Journal of Tropical Crop Science Sainstek : Jurnal Sains dan Teknologi Buletin Palma International Journal of Research in Vocational Studies (IJRVOCAS)

Sudirman Yahya

Departemen Agronomi Dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti Kampus IPB Darmaga, Bogor 16680, Indonesia

Author-ID : 421456

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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ANALYSIS OF CAUSATIVE FACTORS FOR CANKER DISEASE EPIDEMIC ON RUBBER PLANTS IN SOUTH SUMATRA Febbiyanti, Tri Rapani; Wiyono, Suryo; Yahya, Sudirman; Widodo, Widodo
JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Vol 19, No 1 (2019): MARCH, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Publisher : Universitas Lampung

Analysis of Causative Factors for Canker Disease Epidemic on Rubber Plants in South Sumatra. Lasiodiplodia theobromae is the cause of stem canker in the rubber plant (Hevea brasiliensis), this is a new disease and has never been reported in Indonesia. Currently, data on environmental factors and cultivation techniques related to the development of stem canker are not available so research needs to be done on this subject. The objective of the study was to analyze environmental factors and cultivation techniques related to stem canker on rubber trees in southern Sumatra. The study was conducted by collecting data on environmental factors and cultivation techniques and then analyzed the association with stem canker. Field observation was carried out at 21 locations in PT. Perkebunan Nusantara VII Business Unit Padang Plawi Bengkulu, Tulung Buyut Lampung, Musilandas Palembang and Experimental Garden of Sembawa Research Center, Indonesian Rubber Research Institute at Palembang to measure the severity and incidence of this disease. Besides that, the data of cultivation technique and the condition of the garden were taken from the officer at those locations. Soil sample from each location was taken in a composite way, then its physical and chemical components were analyzed. The analysis was conducted to find out the correlation between cultivation and disease severity using chi-square test. The relationship between chemical and physical factors of the soil with the disease severity was analyzed using a multivariate test of principal component analysis/PCA. Regression analysis was conducted to show the possible relation to the incidence and severity of this disease. The location, clones, weed control and the number of plants per hectare showed a correlation with the disease severity. There was a positive correlation between incidence and severity of the disease. The highest disease severity occurred at the Sembawa location on clone BPM 24, with the number of plant population per ha was ? 555 trees and weed control using herbicide. Content of soil nitrogen, dust, clay and water as well as cation exchange capacity (CEC)were suggested to significantly contribute to the severity of stem canker.

Plant Growth Performance of Top Grafted Young Cacao at Various Elevations in Indonesia Poleuleng, Andi Besse; Agusta, Herdhata; Yahya, Sudirman; Wachjar, Ade; Tjoa, Aiyen
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

The purpose of this study was to evaluate the plant growth performance of top grafted young cacao cultivated in various elevations. This research was conducted from January-August 2019 in South Sulawesi and Central Sulawesi. A total of 54 plants were taken randomly from 6 locations with 3 altitudes (<300, 300-600, >600 meter above sea level, as.). The results showed that there was not significant different of plant height, stem circle, crown circle, the number of primary branches, the number of flowers, the length of horizontal and vertical roots in response to different elevations. However, the height of primary stem and leaves number of cacao from <300 m asl was significantly greater than those from either 300-600 m asl or > 600 m asl. The largest crown portion of actual biomass was found in the branches, then followed by the leaves and stem. While the highest actual root biomass was found at 10-20 cm soil depth.

Parameter Genetik Jagung Populasi Bisma pada Pemupukan yang Berbeda. II. Ragam dan Korelasi Genetik Karakter Sekunder Sutoro, Sutoro; Bari, Abdul; Subandi, Subandi; Yahya, Sudirman
Jurnal AgroBiogen Vol 3, No 1 (2007): April
Publisher : Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumber Daya Genetik Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jbio.v3n1.2007.p9-14

Genetic Parameter of Secondary Traits of Corn in BismaPopulation under Different Fertilizer Application. II. GeneticVariance and Correlation of Secondary Traits.Sutoro, Abdul Bari, Subandi, and Sudirman Yahya. Themagnitute of secondary traits of corn could affect the cornyield. Genetic parameter value of secondary traits areimportant in plant breeding, especially in selection program.Genetic parameter could be used for estimation of correlatedresponse by involving value of genetic correlation andgenetic variance. Value of genetic parameter is differentamong population and environment. Genetic parameter ofsecondary traits on Bisma population under 3 different levelof fertilizer application were studied in Bogor. Result of thestudy showed that addtive genetic variance of ASI, chlorofil,seed number, amount of green leaves and LAI at floweringstage greater than dominant variance. Conversely, additivegenetic variance of green leaf number and LAI at maturingstage, and leaf senescene are lower than dominant variance.ASI has greatest heritability among secondary traitsunder three level of fertilizer application. Positive geneticcorrelation was found between grain yield under low fertileizerapplication and ASI under high level fertilizer applicationor between grain yield under high level of fertilizer applicationand ASI under low level fertilizer application.

The Application of Filter Cake Compost to Improve The Efficiency of Inorganic Fertilizer in Upland Sugarcane (Saccharum officinarum L.) Cultivation Wibisana, Dharend Lingga; Purwono, Purwono; Yahya, Sudirman
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.119.93-102

The production of sugarcane in 2018 decreased due to the change in the cultivation method from lowland to upland. This research aimed to study the responses of growth and yield of two sugarcane varieties to the application of filter cake compost and inorganic fertilizer in upland sugarcane cultivation. This experiment was arranged in a split-split plot design consisting of three-factors, which were sugarcane varieties, the levels of filter cake compost, and the rates of inorganic fertilizer, assigned to the main plot, sub-plot, and sub-sub plots, respectively. The two sugarcane varieties were PS 881 and PS 862. The three levels of filter cake compost were 0, 5, 10 tons ha-1, and the four rates of inorganic fertilizers (percent of recommended dosage) were 25%, 50%, 75%, and 100%. The results showed that the growth and yield of PS 862 was better than that of PS 881, shown in the plant height, stem diameter, number of stems, and the length of internodes. The use of filter cake compost at a dose of 5 tons ha-1 was more efficient, and it could provide an efficiency of 0.097 tons per kg of cane at a dose of 76.76% inorganic fertilizer. Yet, it cannot reduce the use of inorganic fertilizer in producing sugarcane yield.

Field Adaptation of Some Introduced Wheat (Triticum aestivum L.) Genotypes in Two Altitudes of Tropical Agro-Ecosystem Environment of Indonesia ADEEL ABDUL KARIM ALTUHAISH; . MIFTAHUDIN; . TRIKOESOEMANINGTYAS; SUDIRMAN YAHYA
HAYATI Journal of Biosciences Vol. 21 No. 1 (2014): March 2014
Publisher : Bogor Agricultural University, Indonesia

Heat stress is a major environmental factor limiting wheat productivity in tropical regions such as Indonesia. The objective of this study was to investigate the adaptability of introduced wheat genotypes in tropical agro-ecosystems. Sixteen spring wheat genotypes were grown at two different altitudes i.e. low altitude (176 m asl) with an average temperature of 29.8 oC located at Leuwikopo Field Experimental Station, Bogor Agricultural University, Darmaga Bogor and high altitude (1100 m asl) with an average temperature of 20.6 oC at Cipanas Field Experimental Station (Ornamental Crop Research Station), Cianjur, West Java, Indonesia from July to November 2012. Plant height, number of tillers, flag leaf area, leaf angle, days to flowering, spike number per plant, empty spikelet number, grain weight per plant and 100 grain weight were observed following the standard methods. Heat susceptibility index was calculated based on grain weight per plant. The results showed that cultivation at a low altitude, hotter environment remarkably affected wheat growth and yield, as reflected in overall reduction of plant height, reduced number of tillers and leaf area, and ultimately reduced yield and yield components for most genotypes compared to the same measures taken at high altitude in lower temperatures. Plant growth before heading was similar in both locations, but the days to flowering was longer in high altitude than that in low altitude. High temperature stress in low altitude reduced the spike number/plant, grain weight/plant, 100 grain weight and increase number of empty spikelet/spike. Based on our results for heat susceptibility index, six genotypes, namely Sbr, Ymh, Astreb/Cbrd, Astreb/Ningma, H-20 and Nias, were characterized as heat tolerant genotypes.

Morpho-Agronomical Diversity of Forest Clove in Moluccas, Indonesia Asri Subkhan Mahulette; Hariyadi Hariyadi; Sudirman Yahya; Ade Wachjar; Ilyas Marzuki
HAYATI Journal of Biosciences Vol. 26 No. 4 (2019): October 2019
Publisher : Bogor Agricultural University, Indonesia

Forest clove (Zyzygium aromaticum) is a type of wild clove found in Moluccas. The increasing interest of farmers in cultivating this plant leads to complete their information of morpho-agronomical characteristics which could provide diversity reflecting morpho-agronomical their distribution areas. This study aimed to characterize the morpho-agronomical traits of Forest clove plants in Moluccas. By survey, Forest clove more than 15 year old tree totalling of 50 populations were observed their 54 morpho-agronomical characteristics in two areas (Ambon and Seram) from March to June 2018. Two aromatic cloves, namely Tuni and Zanzibar were used for comparative analysis. The results showed that Forest cloves had a similarity of 78% among the population and grouped into 3 groups with a morpho-agronomical variation of 22%. On the contrary, Forest cloves and comparators (Tuni and Zanzibar) had morpho-agronomical differences of 58%. Based on the main component analysis, there were 11 most influential characters of Forest cloves (leaf size index, leaf length, leaf width, leaf area, petiole length, flower length, diameter of flower tube, ripe flower weight, fruit length, fruit width, and fruit weight) which could be descriptors for this plant species.

Permodelan Pertumbuhan dan Produksi Kelapa Sawit pada Berbagai Taraf Penunasan Pelepah Nope Gromikora; Sudirman Yahya; suwarto ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 3 (2014): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTThe numbers of leaf frond influence oil palm yield, especially fresh fruit bunch weight and fresh fruit bunch production. The objective of this research was to obtain oil palm growth and production model for different levels of frond pruning. The experiment was conducted at PT. Astra Agro Lestari, Pangkalan Bun, Central Kalimantan, from August 2010 to February 2012. The experiment was arranged in a randomized block design with two factors and three replications for each oil palm age. The first factor was numbers of unpruned frond and the second factors was pruning seasons. The frond treatment consisted of 41-48, 49-56, and 57-64 fronds. The pruning seasons consisted of first period (early to mid rainy season: September-December), second period (mid to end of rainy season: Januari-April), and third period (dry season: May-August). Stella production model was created based on pruning experiment and weather data. The constructed production model was able to estimate 75% variable of oil palm production and fresh fruit bunch weight at different levels of pruning. Keywords: oil palm, pruning management, Stella model

Identification of Gene Related to Hard Bunch Phenotype in Oil Palm (Elaeis guineensis Jacq.) Roberdi ,; Sobir ,; Sudirman Yahya; Nurita Toruan-Mathius; Tony Liwang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 2 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTMolecular genetic analysis of hard bunch phenomenon in oil palm was done in order to elucidate the role of genetic factor underlying hard bunch in oil palm plantation. The aim of this study was to identify the AFLP primer combination that co-segregates with hard bunch phenotype related gene in oil palm. Molecular analysis was done by bulk segregant analysis approach. DNA was isolated from leaves of the normal and hard bunch palm. DNA from ten individual palms from each category were pooled and used as a template. A total of 56 AFLP primer combinations were selected for selection of polymorphic primer, and as a result it was found that 22 AFLP primer combinations (39.28%) were polymorphic. A total of 48 individual of palm DNA containing 24 individual for each group were further genotyped by those 22 polymorphic markers. Of these, one AFLP primer combination (E-ACC/M-CTG) was obtained as a co-segregated marker that distinguished the hard bunch DNA from the normal one. Based on the analysis of the target sequence aligned to the oil palm DNA sequences available in database, we found that our sequence has similarity with Ty-1 copia retrotransposon. This sequence distribute in all 16 linkage group of oil palm genome.Keywords: abnormal fruits, AFLP, oil palm, Ty-1 copia retrotransposon

Monitoring Tool for Electricity Usage in Residential Homes Based on the Internet of Things (IoT) Using BLYNK Application Nofiansah; Marniati, Yessi; Rumiasih; Yahya, Sudirman; Yani, Herman; Bofynna, Pio Agma
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 3 No. 3 (2023): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v3i3.226

Electricity is a basic need of human beings. The consumption of electricity usage is getting bigger and bigger. Electricity usage is usually wasteful due to lack of public awareness and ineffective use of electricity. With this problem, the author aims to design loT-based electric power usage monitoring system in home electrical appliances. This tool is designed using sensors to detect the value of the voltage and current of the load attached to the electricity but still using the BLYNK application as a server and application to monitor the use of electric power through a smartphone application. The measurement results include the data of current, voltage, and electrical power used. This system can also remotely switch appliances ON/OFF. The test was conducted by comparing the results of the power value from the power meter with the power value in BLYNK application. After the test, the results of the comparison between the monitoring tool and the power meter measuring instrument obtained an average power error value of 0.5%. So that the accuracy value of the tool can also be 99.5%. With a large accuracy value, it means that the tool works well and can be used to monitor the use of electrical energy in households.

Application of Empty Fruit Bunches of Oil Palm and Indigofera zollingeriana for Conservation of Oil Palm Plantation Saijo, Saijo; Sudradjat, Sudradjat; Yahya, Sudirman; Hidayat, Yayat; Rosawanti, Pienyani
PLANTA TROPIKA Vol 10, No 2 (2022)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v10i2.15467

Oil palm empty fruit bunches are materials used as organic fertilizers that can be applied to oil palm plantations, thereby reducing the use of inorganic fertilizers. Indigofera zollingeriana is an appropriate alternative as an interplant because of its high branch and leaf development. Functions as a ground cover and a supplier of carbon stocks naturally plays a role in water and soil conservation. This study aims to determine the effect of oil palm empty fruit bunches and I. zollingeriana on land improvement to support oil palm growth and production. Variables observed included changes in soil water content, soil microorganism activity, and carbon stock. The results showed that the soil planted with I. zollingeriana and given the empty fruit bunches of oil palm had a higher soil moisture content. The highest soil carbon stock, oil palm carbon stock, and vegetation carbon stock were 81.6 t ha-1, 36.60 t ha-1, and 1.89 t ha-1, respectively. The population and activity of microorganisms varies. The highest total microorganisms were treated with I. zollingeriana and oil palm EFB 105 (10⁵CFU g-1), while the lowest was 60 (10⁵CFU g-1). Planting I. zollingeriana and providing oil palm empty fruit bunches increased groundwater reserves by 36.71%.

Co-Authors AA Sudharmawan, AA Ade Wachjar ADEEL ABDUL KARIM ALTUHAISH Agus Purwito Aiyen Tjoa Alfian, Anggra Amperawan Amperawan, Amperawan Andi Besse Poleuleng ASMARLAILI SAHAR Bari, Abdul Bofynna, Pio Agma Chairani Hanum Chairani Hanum Desta Wirnas Dharend Lingga Wibisana Diana Sofia Hanafiah DIDI SOPANDY Febbiyanti, Tri Rapani Febriani, Alda Haridjaja, Oteng Hariyadi Hariyadi Hariyadi, nfn Herdhata Agusta Hesti Pujiwati Ida Nur Istina, Ida Nur Ilyas Marzuki KOMARUDIN IDRIS Kukuh Murtilaksono Kusumawati, Sri Ambar Mahulette, Asri Subkhan Marniati, Yessi Miftahudin . Mira Ariyanti Muhammad, Fakhry Munif Ghulamahdi Nofiansah Nope Gromikora Nunyai, Aslina Putri Nurita Toruan-Mathius Pambudi, Ignatius Harry Tri Pienyani Rosawanti Purwono Purwono, Purwono Rasyad, Sabilal Retno Prihatini Roberdi , Rumiasih Saijo Sandra Arifin Aziz Simanjuntak, Hiskia Siregar, Hasril H. Sobir Sobir Sofiana, Yelli Sofyan Zaman Sri Mulatsih Sri Mulatsih Subandi, Subandi Sudradjat Sudradjat Suryo Wiyono Sutarta, Edy Sigit Sutarta Sigit Sutoro, Sutoro Suwarto Suwarto Suwarto Suyadi, Andri Tony Liwang Tri Rapani Febbiyanti, Tri Rapani Trikoesoemaningtyas Wahyu Hidayat WAHYU Q. MUGNISJAH Widodo Widodo Yani, Herman Yayat Hidayat Yenni Asbur Yoga Yuniadi

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