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INSTALASI DAN EVALUASI GROUNDING UNTUK MBE INDUSTRI LATEKS PTAPB MENGGUNAKAN MULTIPLE ROD Suyamto, Suyamto; Sutadi, Sutadi; Nuraini, Elin
Jurnal Iptek Nuklir Ganendra Vol 15, No 2 (2012)
Publisher : BATAN

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Abstract

INSTALASI DAN EVALUASI GROUNDING UNTUK MBE INDUSTRI LATEKS PTAPB MENGGUNAKAN MULTIPLE ROD. Telah dilakukan instalasi dan evaluasi grounding pada MBE untuk industri lateks PTAPB menggunakan multiple rod. Instalasi didasarkan pada kebutuhan nilai tahanan pentanahan Rp yang kecil dengan cara pemilihan bentuk, ukuran dan jumlah elektrode serta lokasi penanaman elektrode. Agar diperoleh resistivitas tanah  yang rendah, sumur ditimbun tanah liat pada bagian di sekitar elektrode. Instalasi dilakukan dengan menanam elektrode-2 batang tembaga (Cu) pejal diameter 16 mm pada 2 buah sumur, masing-2 berjumlah 4 buah @ 2 meter dan 8 buah @ 1 meter, menembus 2 lapisan tanah. Dengan konfigurasi elektrode yang telah ditentukan, diperoleh Rp terukur rata-rata 3,99  pada sumur I dan 5,82  pada sumur II atau Rpt = 2,36  jika dirangkai paralel, sedangkan dari pengukuran setelah keduanya dikopel diperoleh nilai rata-rata Rpt = 1,97 . Dari perhitungan secara trial and error dengan memvariasi , diperoleh tahanan tanah bagian atas R1 = 6,53  dan tahanan tanah bagian bawah R2 = 10,41  atau jika diparalel RpI = 4,01  untuk sumur I, sedangkan untuk sumur II diperoleh R1 = 7,72  dan R2 = 23,64  yang jika diparalel diperoleh Rp2 = 5,81 . Bila tahanan pada sumur I dan II diparalel diperoleh Rpt = 2,37 . Perbedaan Rpt antara pengukuran dan perhitungan 0,40  sangat dimungkinkan karena pengukuran Rpt sulit dilakukan dan sangat dipengaruhi oleh inhomogenitas resistivitas tanah antara satu tempat dengan tempat yang lain. Dari evaluasi diketahui bahwa pengaruh panjang dan kedalaman penanaman lebih dominan dibanding dengan jumlah elektrode. Dengan perbedaan kedalaman elektrode 0,55 m dibanding dengan jumlah elektrode 2 kali diperoleh perbedaan tahanan yang sangat besar yaitu 18,47 Ω.Kata kunci : MBE, tahanan pentanah, batang banyak
IMPACT OF BRACHIARIA, ARBUSCULAR MYCORRHIZA, AND POTASSIUM ENRICHED RICE STRAW COMPOST ON ALUMINIUM, POTASSIUM AND STABILITY OF ACID SOIL AGGREGATES Hafifa, Bariot; Sabiham, Supiandi; Anas, Iswandi; Sutandi, Atang Sutandi; Suyamto, Suyamto
Indonesian Journal of Agricultural Science Vol 13, No 1 (2012): April 2012
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Acid soil is commonly grown with cassava, which in general, tolerate low soil  fertility and aluminum (Al) toxicity. However, without any improvement efforts such soil will become worse. Intercropping cassava with Brachiaria decumbens (BD) which adapts to acid soil and tolerates low fertility soils as well as application of arbuscular mycorrhiza (AM) and organic matters are among the important efforts to rehabilitate this soil. The experiment was conducted to  examine the impact of BD, AM, and potassium (K) enriched rice straw compost on exchangeable Al, available K, and stability of soil aggregates. Experiment was arranged in a completely randomized design with three factors and three replications. The first factor was BD as cassava intercropping, the second factor was AM, and the third factor was 2 t ha-1 rice straw compost enriched with 0 kg, 50 kg, 100 kg, and 200 kg KCl ha-1. Brick pots (1 m length x 1 m width x 0.45 m depth) filled with Kanhapludult soil was used for growing cassava in which row of BD was planted at 60 cm from cassava stem. K-enriched rice straw compost and AM (10 g per stem) were applied around cassava stem at 2 and 12 days after planting, respectively. BD was cut every 30 days and the cutting was returned to the soil. Soil exchangeable Al was analyzed at 0, 3, 6 and 9 months after planting (MAP), while Al and K contents as well as aggregate stability were measured at 6 MAP. The results showed that planting BD decreased 33% exchangeable Al, which means that the root exudates of this grass was effective in detoxifying Al3+. Treatment of BD and/or in combination with AM was effective in preserving K added to the soil, increasing total polysaccharides, and improving soil aggregate stability. This indicated that planting BD and applying AM and Kenriched rice straw compost improved acid soil fertility, and therefore can be recommended in cassava cultivation.
GENETIC VARIABILITY, HERITABILITY AND EXPECTED GENETIC ADVANCES OF QUANTITATIVE CHARACTERS IN F2 PROGENIES OF SOYBEAN CROSSES Hakim, Lukman; Suyamto, Suyamto; Paturohman, Eman
Indonesian Journal of Agricultural Science Vol 15, No 1 (2014): April 2014
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

The F2 progenies of crosses among three soybean varieties were evaluated with their parents at Ngale Experimental Farm, Ngawi, East Java during the dry season of 2011. The experi-ment was conducted in a randomized block design with three replications. The seeds of each F2 progenies and parents were planted in two rows of 4.5 m long. Plant spacing was 40 cm x 15 cm and each hill contained one plant. Among the characters studied, seed weight per plant, number of pods per plant and days to maturity had the highest coefficient of variability with the means of 52.6%, 48.2% and 41.9%, respectively. Whereas seed size, plant height and number of reproductive nodes had moderate values of 36.9%, 35.5% and 37.4%, respectively. Number of branches and days to flowering had the lowest variability of 11.7% and 15.3%, respectively. Number of pods per plant, days to maturity, plant height and seed size had high mean estimates of heritability coupled with high genetic advance. The genetic progress of these characters that would be obtained for one generation of selection was estimated 47.2%, 45.7%, 40.9% and 40.3%, respectively. Among the agronomic characters, plant height, number of pods per plant, seed size and days to maturity had the highest coefficient of variability associated with high heritability and genetic advance. Therefore, selection for high yielding with early maturity soybean genotypes based on plant height, number of pods per plant and seed size might be possible.
ANALISIS EFISIENSI TRAFO FREKUENSI TINGGI PADA SUMBER TEGANGAN TINGGI COCKCROFT WALTON MBE LATEKS Darsono, Darsono; Suyamto, Suyamto; Taufik, Taufik
Jurnal Iptek Nuklir Ganendra Vol 17, No 2 (2014)
Publisher : BATAN

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Abstract

Trafo frekuensi tinggi (TFT) 1 fasa, 15 kW, 7/17,5 kV, 40 kHz yang dibuat telah dioperasikan pada MBE namun belum diketahui karakteristiknya. Efisiensi merupakan karakteristik TFT yang penting untuk dianalisis dalam rangka mengetahui kemampuannya dalam mencatu daya STT-MBE pada berbagai arus berkas elektron. Analisis dilakukan dengan menghitung rugi-rugi inti dan rugi-rugi lilitan dimana rugi inti tergantung pada bahannya, sedangkan rugi lilitan tergantung pada arus dan tahanannya dengan memperhatikan kenaikan suhu yang terjadi saat dioperasikan. Pada induksi magnet maksimum Bm 0,15 T dan frekuensi operasi 40 kHz, diketahui rugi daya inti 611,78 W sedangkan rugi daya lilitan total 9,85 W pada beban penuh 1,07 A sehingga efisiensi trafo pada beban penuh 96,02 %. Efisiensi trafo dihitung dengan variasi arus beban atau arus berkas elektron Ibe dimana rugi daya lilitan berbanding kuadrat terhadap arus beban. Efisiensi maksimum (ɳm) TFT di bawah beban penuh adalah sebesar 95,71 % terjadi pada Ibe 11 mA atau 92,4 % beban penuh. Pada Ibe yang lebih besar misalnya 12 mA, TFT mengalami kondisi beban lebih sebesar 9,34 %. Jika dibandingkan dengan trafo tenaga yang mempunyai efisiensi maksimum sekitar 80 % beban penuh, maka TFT yang dibuat mempunyai efisiensi maksimum pada persen beban yang lebih besar. Efisiensi TFT juga mempunyai kecenderungan sama dengan jenis trafo tenaga yaitu semakin besar bila bebannya semakin besar.
Senjang Hasil Tanaman Padi dan Implikasinya terhadap P2BN Fagi, Achmad M.; Sembiring, Hasil; Suyamto, Suyamto
Buletin Iptek Tanaman Pangan Vol 3, No 2 (2008): Oktober 2008
Publisher : Puslitbang Tanaman Pangan

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Abstract

Metode penelitian kendala dan senjang hasil padi dikembangkan oleh IRRI (International Rice Research Institute) secara komprehensif yang dikelompokkan menjadi masalah biofisik, teknik, sosial-ekonomi dan kelembagaan. Metode yang sama digunakan untuk mengevaluasi efektivitas dari 10 jurus komponen teknologi paket-D yang digunakan dalam program Supra Insus. Petani pembandingnya adalah mereka yang sebelumnya peserta program intensifikasi Bimas. Komponen teknologi yang diverifikasi adalah pengolahan tanah sempurna, pemupukan berimbang, pemberian PPC (pupuk pelengkap cair), cara pengendalian hama dengan prinsip PHT, dan jarak tanam untuk mencapai populasi sebanyak 200.000 rumpun per ha. Hasil verifikasi menunjukkan bahwa pengolahan tanah sempurna merupakan komponen teknologi 10 jurus paket-D yang paling efektifmeningkatkan hasil. Pemupukan lengkap (NPK) ditambah PPC plus ZA atau Zn atau ZA dan Zn tidak efektif meningkatkan hasil kalau tanaman padi ditanam pada tanah yang tidak melumpur sempurna. Jarak tanam dan cara pengendalian hama menjadi penentu kenaikan hasil, kalau tanah melumpur sempurna. Jadi, tidak semua komponen 10 jurus paket-D perlu dianjurkan pada lokasi-lokasi Supra Insus. SUTPA (sistem usahatani padi berorientasi agribisnis) yang dipandu oleh peneliti dalam penerapan teknologi, ketepatan waktu ketersediaan pupuk dan kredit, meningkatkan hasil padi di areal Supra Insus. Hal ini mengindikasikan bahwa sistem penyuluhan seperti yang berlaku pada saat program Bimas berlangsung diperlukan lagi. P2BN dicanangkan pada pasca-Supra Insus, pada saat petani telah terbiasa mengelola tanaman padinya secara intensif. Dapat diperkirakan bahwa kasus pelandaian produksi padi nasional terjadi akibat faktor sosialekonomi dan kelembagaan yang tidak kondusif bagi petani untuk menerapkan teknologi. Upaya untuk memacu laju kenaikan produksi padi sebesar 6,4% pada tahun 2007 melalui penerapan teknologi PTT pada padi sawah seluas 2,0 juta ha menghadapi tantangan faktor biofisik dan sosial-ekonomi yang lebih kompleks. Sebab itu anjuran teknologi PTT harus lebih cerdas yang dilandasi oleh nalar ilmiah, jangan sampai penerapan 12 jurus teknologi PTT justru menurunkan efisiensi. Efektivitas komponen teknologi PTT yang perlu dikaji dan merupakan isu terkini adalah penanaman varietas padi (varietas unggul biasa vs varietas hibrida), pemupukan (pemupukan lengkap vs site spesific nutrient management), dan tata tanam (jajar tegel vs jajar legowo). Metode pengkajian (perlakuan, rancangan percobaan, data yang dikumpulkan, metode analisis, dan sebagainya) dikemukakan dalam artikel ini.
Revitalisasi Sistem Perbenihan Tanaman Pangan: Sebuah Pemikiran Suyamto, Suyamto
Buletin Iptek Tanaman Pangan Vol 6, No 1 (2011): Juni 2011
Publisher : Puslitbang Tanaman Pangan

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Abstract

Revitalisasi perbenihan merupakan salah satu dari tujuh revitalisasi yang digunakan untuk mencapai empat target utama pembangunan pertanian 2010-2014 yang meliputi pencapaian swasembada dan swasembada berkelanjutan; peningkatan diversifikasi pangan; peningkatan nilai tambah, daya saing dan ekspor; serta peningkatan kesejahteraan petani. Upaya yang dilakukan untuk melakukan revitalisasi perbenihan dan perbibitan telah dicantumkan dalam Renstra Kementerian Pertanian 2010-2014, namun masih perlu penjabaran dan perumusan yang lebih operasional sehingga mampu mendorong industri perbenihan nasional untuk maju dan berdaya saing. Perbenihan harus dilihat sebagai suatu sistem yang terdiri dari paling tidak empat subsistem yang saling berhubungan mulai dari hulu hingga hilir, yaitu pengelolaan sumber daya genetik (SDG); perakitan dan pelepasan varietas unggul; produksi, distribusi/pemasaran dan pengendalian mutu benih; serta jaringan informasi perbenihan. Melakukan revitalisasi perbenihan berarti harus melakukan revitalisasi pada semua subsistem perbenihan tersebut. Pemikiran tentang revitalisasi pada masingmasing subsistem perbenihan disampaikan pada tulisan ini, dengan harapan dapat dijadikan masukan untuk perumusan upaya-upaya konkrit dalam melakukan revitalisasi perbenihan, utamanya tanaman pangan. Kebijakankebijakan di bidang perbenihan masih perlu diharmonisasi dan diarahkan untuk mendorong tumbuh dan berkembangnya industri perbenihan nasional. Kebijakan bantuan langsung benih unggul (BLBU) yang sudah dilaksanakan selama empat tahun terakhir ini perlu dievaluasi efektivitasnya. BLBU perlu direvitalisasi agar mampu meningkatkan produktivitas dan pergiliran varietas melalui penggantian varietas, mampu meningkatkan indeks pertanaman melalui penggunaan varietas unggul umur genjah, mampu mendorong industri/penangkar benih setempat sehingga mandiri benih, tidak menjadikan petani bergantung pada bantuan benih, dan khusus untuk padi hibrida diutamakan benih yang diproduksi di dalam negeri. Reformasi dan revitalisasi juga harus dilakukan pada kelembagaan perbenihan nasional, utamanya Badan Benih Nasional (BBN) yang struktur, keanggotaan, tugas, dan perannya, yang saat ini tidak lagi sesuai.
KERAGAMAN GENETIK, HERITABILITAS DAN KEMAJUAN GENETIK KARAKTER AGRONOMI PADA POPULASI GALUR F2 HASIL PERSILANGAN Hakim, Lukman; Suyamto, Suyamto; Suyamto, Suyamto
Jurnal Penelitian Pertanian Tanaman Pangan Vol 2, No 3 (2018): DESEMBER 2018
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

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Genetic variability, heritability estimate and expected genetic advance may be useful to provide the basis for planning of more efficient in selection program. The objectives of this study were to determine genetic variability, heritability and genetic advance of agronomic characters that could be realized through selection of segregation progenies. The F2 soybean progenies derived from two cross combinations and their three parent varieties were evaluated for their genetic variability, heritability and expected genetic advance of agronomic traits at Muneng Experimental Station, Probolinggo, East Java, during dry season of 2016. The experiment was arranged in a randomized block design, with three replications. Seeds of each F2 progenies and their parents were sown in four rows of 4 m length of plots. Plant spacing was 40 cm x 20 cm, with one plant per hill. Plant population of each F2 progenies and their parents were 80 plants in each replication. Among the character observed, number of pods per plant, seed yield per plant and days to maturity had the highest coefficient of variability, with the means of 53.1%, 48.2% and 42,5% respectively. Plant height and seed size had a moderate coefficient of variability, with the means of 33.5% and 35.7%. While the days to flowering, number of branches and number of nodes per plant had the lowest coefficient of variability, and the means were only 19.9%, 14.1% and 15.8% respectively. The heritability estimate of the eight agronomic traits ranged from 18.9%-53.6%. Number of pods per plant and plant height had the highest heritability estimates for the two crosses, and the means were 53.6% and 41.5% respectively. The days to maturity, seed size and days to flowering were also had high heritability estimate of 38.8%, 36.8% and 36.6%. The mean heritability estimates for seed yield per plant, number of nodes and number of branches per plant were the lowest of only 20.6%, 19.7% and 18.9% respectively. Based on the F2 data, selection on the number of pods per plant had the highest expected genetic advance of 44.7%, followed by the days to maturity (41.0%) and the plant height (40.4%). Seed yield per plant, seed size and the days to flowering had a moderate expected genetic advance of 34.8%, 33.4% and 26.8%. The means of expected genetic advance for number of branches and number of nodes per plant were the lowest of 13.8% and 13.9% respectively. In relation to grain yield, the mean heritability estimate for seed yield per plant was low, of only 20.8%. However, considerable high genetic heritability (48.2%) and genetic advance (34.8%) was present on the seed yield per plant.
PENGARUH RELAKSASI OTOT DALAM MENURUNKAN SKOR KECEMASAN TTMAS MAHASISWA MENJELANG UJIAN AKHIR PROGRAM (UAP) DI AKADEMI KEPERAWATAN NOTOKUSUMO Suyamto, Suyamto
medisains Vol 11, No 2 (2012)
Publisher : medisains

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Abstract

Background: Anxiety is a disorders that has symptoms of heart, dizzy, wet palm and foot or emotionaldisorders such as discomfort feeling, difficult to concentrate, worried, exhaustness, insomnia, less appetite. Thiscondition often occurred in students of Nursing Academy of Notokusumo Yogyakarta when they are facing finalexamination. This is obtained from a preliminary research that was conducted by giving question on thecondition experienced by the students of Akper Notokusumo Yogyakarta regarding their worryness in facing theexamination with subject of 100 students that was held on the 8th – 11th of Mey 2012Objective: This research was aimed to find out the influence of muscle relaxation in decreasing the TMASanxiety score of students in facing their final examination.Method: This was a quasi experimental design with randomized control group pre test and post test design thatwas research subjects who were classified into two groups that were treatment group that was located in AkperNotokusumo with 100 students class 3A and 3B control group that was located in Akper Notokusumo withsubjects of 50 students class 3 C. Both of the groups were given pre test before given treatment, and yet, onegroup was given post test after treatment while the other group was given post test without treatment. Theintsrument being used was Taylor Manifest Anxiety Scale (TMAS). The analysis being used to examine thedifference of treatment and control group was conducted with independet sample t test with significance level ofp = 0.05.Result : The result of the research showed that there was a decreasing on anxiety from pre test to post test. Incontrol group, there was no decreasing of anxiety from pre test to post test even there was an improvementduring post test.Conclusion: Relaxation had influence in decreasing anxiety of student of Nursing Academy of NotokusumoYogyakarta as treatment group and the result was lower during post test compared to pre test.Keyword: anxiety, to relaxation, student
GENETIC VARIABILITY, HERITABILITY AND EXPECTED GENETIC ADVANCES OF QUANTITATIVE CHARACTERS IN F2 PROGENIES OF SOYBEAN CROSSES Hakim, Lukman; Suyamto, Suyamto; Paturohman, Eman
Indonesian Journal of Agricultural Science Vol 15, No 1 (2014): April 2014
Publisher : Indonesian Center for Agricultural Library Technology Dissemination - IAARD

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Abstract

The F2 progenies of crosses among three soybean varieties were evaluated with their parents at Ngale Experimental Farm, Ngawi, East Java during the dry season of 2011. The experi-ment was conducted in a randomized block design with three replications. The seeds of each F2 progenies and parents were planted in two rows of 4.5 m long. Plant spacing was 40 cm x 15 cm and each hill contained one plant. Among the characters studied, seed weight per plant, number of pods per plant and days to maturity had the highest coefficient of variability with the means of 52.6%, 48.2% and 41.9%, respectively. Whereas seed size, plant height and number of reproductive nodes had moderate values of 36.9%, 35.5% and 37.4%, respectively. Number of branches and days to flowering had the lowest variability of 11.7% and 15.3%, respectively. Number of pods per plant, days to maturity, plant height and seed size had high mean estimates of heritability coupled with high genetic advance. The genetic progress of these characters that would be obtained for one generation of selection was estimated 47.2%, 45.7%, 40.9% and 40.3%, respectively. Among the agronomic characters, plant height, number of pods per plant, seed size and days to maturity had the highest coefficient of variability associated with high heritability and genetic advance. Therefore, selection for high yielding with early maturity soybean genotypes based on plant height, number of pods per plant and seed size might be possible.
KORELASI ANTAR-KARAKTER DAN SIDIK LINTAS ANTARA KOMPONEN HASIL DENGAN HASIL BIJI KACANG HIJAU (Vigna radiata (L) Wilczek) [Correlation Among Characters and Path Analyses Between Yield Components with Grain Yiled on Mungbean (Vigna radiata (L) Wilczek)] Hakim, Lukman; Suyamto, Suyamto
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

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A total of 10 mungbean (Vigna radiata (L.) Wilczek) genotipes including check variety (Vima) were evaluated on rainfed after rice at Ngale Experimental Farm, Ngawi, East Java during early dry season of 2010. The experiment was conducted in randomized complete block design with three replications. Plot size was 4 m x 5 m, plant spacing was 40 cm x 20 cm, each hill contained two plants. A correlated and path coefficient analyses were used in order to determine the association among characters and quantify the direct and indirect effects of agronomy traits on seed yield. The study has identified 2 promising lines, i.e. MMC342d-3-4 and MMC342d-kp-3-3 produced the highest yield of 2.2 t and 2.0 t/ha respectively and had good adaptation on rainfed. Two varieties (Kutilang and Kenari) having large seed size (>7.5g/100 seed). Therefore, these varieties can be used as source of parents on breeding program. Among the agronomic characters, number of pods per plant, number of seeds per pod and seed size were positively and significantly correlated with grain yield. The direct effect of number of pods per plant, number of seed per pod and seed size to grain yield as indicated by path coefficient were the highest, while other causal effects to grain yield were small or negative. Based on both analyses, mungbean genotipes with high grain yield should have high number of pods per plant, number of seeds per pod and large seed size. Therefore, number of pods per plant, number of seeds per pod and seed size can be suggested for selection criteria in selecting high yield mungbean genotipes on rainfed.