Muhammad Thamrin
Balai Pengkajian Teknologi Pertanian Sulawesi Selatan Jln. Perintis Kemerdekaan Km. 17,5 Makassar,Sulawesi Selatan

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Efektivitas Strangulasi terhadap Pembungaan Tanaman Jeruk Pamelo ‘Cikoneng’ (Citrus grandis (L.) Osbeck) pada Tingkat Beban Buah Sebelumnya yang Berbeda Thamrin, Muhammad; Susanto, Slamet; Santosa, Edi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 37, No 1 (2009): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Biannual bearing fruit is a common phenomenon in tropical fruit trees. However, effectiveness of flowering induction on those fruits is still lack of study. The ojective of the research was to study the effectiveness of flowering induction on pummelo of different fruit load on previous year. Field experiment was conducted at farmer´s orchad Bantarmara village, Cisarua, Sumedang Region, West Java (300 m above sea level) from August 2007 to April 2008. Experiment was carried out using Completely Randomize Block Design. Experiment was combination of high crop load and less crop load with strangulation position at main stem and primary branches. The results showed that crop load of previous year (higher and less) with strangulation position at primary branches had significant response to the number of  flower clusters, flower buds, bloming flower, fruits formed, and fruit sets as compared to control, when strangulated at primary branches. Nevertheless,  amount of fruit sets, level of greenness leaf and leaf area seened were not determined by fruit load non position of strangulation. This finding implies that fruit load management is an important factor in determining the success of flowering induction using strangulation.   Key words: fruit load, strangulation, pummelo, flowering induction
Pengaruh Naungan dan Varietas Terhadap Pertumbuhan dan Hasil Tanaman Stroberi (Fragaria sp.) di Dataran Rendah Kesumawati, Elly; Hayati, Erita; Thamrin, Muhammad
Jurnal Agrista Vol 16, No 1 (2012): Volume 16 Nomor 1 April 2012
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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ABSTRAK. Tujuan penelitian ini adalah untuk menentukan pengaruh naungan dan varietas terhadap pertumbuhan dan hasil tanaman stroberi pada dataran rendah serta interaksi kedua faktor tersebut.  Penelitian ini menggunakan Rancangan Petak Terpisah pola RAK. Faktor naungan sebagai petak utama terdiri dari:  tidak ternaungi (100% cahaya), 1 lapisan naungan  (70% cahaya) dan dua lapisan naungan (40% cahaya) dan varietas stroberi sebagai anak petak terdiri dari: Michiko, Earlibrite dan Tristar. Peubah yang diamati adalah:  pertambahan tinggi tanaman dan pertambahan daun, number of flowers, jumlah buah, bobot buah, dan diameter buah per tanaman. Hasil penelitian menunjukkan bahwa pertumbuhan dan hasil terbaik tanaman stroberi apabila tidak dinaungi, sedangkan untuk varietas terbaik dijumpai pada Michiko. Ada interaksi yang nyata antara naungan dan varietas terhadap jumlah daun pada 75 HST dan tinggi tanaman pada 15 HST. Varietas Earlibrite yang tidak dinaungi atau dinaungi dua lapis, dapat meningkatkan jumlah daun pada 75 HST. Varietas Michiko yang tidak dinaungi dapat meningkatkan tinggi tanaman.The Effects of Shading and Varieties on Growth and Yield of Strawberry (Fragaria Sp.) in LowlandABSTRACT. The aim of this study was to determine the effect of shading and varieties on growth and yield of strawberry plants in the lowlands and the interaction between these factors. The research was conducted using a Split Plot Design. Factors studied are shading as the main plots consisting of no-shading (100% sunlight), one layer of shading (70% sunlight) and two layers of shading (40% sunlight) and strawberry varieties as subplot consisting of Michiko, Earlibrite and Tristar. Observed variable is the increase in the number of plant height and leaf, number of flowers, number of fruits, fruit weight and diameter of fruit per plant. The results showed the best growth and yield of strawberry plants tend to be found on treatment no-shading. The best varieties tend to be found in varieties Michiko. There is a significant interaction between shading and varieties in the number of leaf age 75 HST and in plant height age 15 HST. The best interaction of the number of leaf in the age of 75 HST was Earlibrite varieties with the no-shading and two layers of shading, as well as to varieties Michiko and Tristar with one layer shading. In plant height age of 15 HST, the best combination of interactions found in varieties Michiko with no-shading.
KAJIAN PEMUPUKAN N, P, DAN K TERHADAP JAGUNG (Zea mays Linn) PADA LAHAN KERING TANAH TYPIC USTROPEPTS Tandisau, Peter; Thamrin, Muhammad
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 12, No 2 (2009): Juli 2009
Publisher : Jurnal Pengkajian dan Pengembangan Teknologi Pertanian

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Kajian Pemupukan  N, P, Dan K  Terhadap Jagung (Zea mays Linn) Pada Lahan Kering Tanah Typic Ustropepts. Assessment of N, P, and K fertilizer to upland maize on Typic Ustropepts.   Assessment was conducted in Jeneponto South Sulawesi, started on October 2004 until March 2005. The objective was to know respon of maize (hybrid and non hybrid variety) to N, P, K fertilizer on upland and to compare farmer’s practice and complete NPK application. A split plot design with five replications was used. Maize variety was used as main plot, and omission plot (fertilizer application) as sub plot. Result showed as follows : 1) Maize respond to N, P, K fertilizer: 2) Un complete fertilizers application caused growth and field quality of maize become lower (10-30%). Complete fertilizers application (N,P,K:200:35:100) indicated much more higher yield (5,5 t/ha) than farmer’s practice (<150 N) with yield of 3,8 t/ha. Hybrid variety of BISI-2 give higher yield (5,67 t/ha) than non hybrid variety of Lamuru (3,3 t/ha). On dry land of typic Ustropepts, under dry climate, nutrient deficiency of N, P, K (low nutrient status), in Jeneponto, N, P, K fertilizer application suggested were 200:35:100 kg/ha or equally to 440 kg Urea, 223 kg SP-36, 191 kg KCl/ha, plus 500 kg organic metter/ha, with dibbling application, plant spacing of 75 x 20 cm2, one plant/hill.  Kajian dilaksanakan di Kabupaten Jeneponto Sulawesi Selatan pada bulan Oktober 2004 sampai Maret 2005. Tujuan kajian mengetahui tanggap tanaman jagung hibrida dan non hibrida terhadap pupuk N, P, dan K pada tanah Typic Ustropepts di lahan kering dan membandingkan aplikasi pemupukan cara petani dan lengkap NPK. Kajian dilakukan melalui pendekatan petak omisi dengan Rancangan Percobaan Petak Terpisah dengan lima ulangan, dimana varietas merupakan petak utama, sementara petak omisi (pemupukan) sebagai anak petak. Hasil kajian menunjukkan sebagai berikut: 1) Tanaman jagung tanggap terhadap pupuk N, P, dan K: 2) Pemberian pupuk yang tidak lengkap menyebabkan pertumbuhan dan hasil berkurang  (10-30%). Aplikasi pupuk lengkap N, P, dan K (200:35:100) menunjukkan hasil lebih tinggi (5,5 t/ha) dibanding cara petani (<150 N) yang hanya mencapai 3,8 t/ha. Jagung hibrida BISI-2 hasilnya lebih tinggi dari pada jagung non hibrida varietas Lamuru  (3,34 t/ha). Pada lahan kering Typic Ustropepts, iklim kering, kekurangan hara N, P, dan K (status hara rendah) di Jeneponto, anjuran aplikasi pupuk untuk jagung adalah 200:35:100 kg/ha atau setara dengan 440 kg Urea, 223 kg SP-36, 191 kg KCl/ha, disertai dengan 500 kg pupuk organik/ha. Aplikasi pupuk disarankan secara tugal, jarak tanam 75x20 cm2, satu tanaman/lubang.  
KAJIAN WAKTU STRANGULASI TERHADAP PEMBUNGAAN JERUK PAMELO ‘CIKONENG’ (Citrus grandis (L.) Osbeck) Thamrin, Muhammad
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 12, No 2 (2009): Juli 2009
Publisher : Jurnal Pengkajian dan Pengembangan Teknologi Pertanian

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An Assessment Time of Strangulation on Flowering Induction of Pummelo ‘Cikoneng’ (Citrus grandis (L.) Osbeck). Field assessment was conducted at Farmer’s Field Bantarmara Village, Cisarua, Sumedang region, West Java from August 2007 to May 2008, to determine the effect of different strangulation times on flowering induction of Pummelo during flowering-off season. Three strangulation times (1,2 and 3 months after harvest, MAH) were arranged in randomized complete block design with 6 (six) replications. An assessment results showed that strangulation at 3 MAH effectively induced flowering appearance (83%) and increased numbers of generative shoots, flowering cluster, bud, blooming, fruit formation and fruit setting. On the other hand, all treated plants had higher C/N ration than control. Kajian lapang dilaksanakan di Tanah Petani (TP) Bantarmara, kecamatan Cisarua, kabupaten Sumedang, Jawa Barat dari bulan Agustus 2007 sampai Mei 2008, untuk melihat waktu strangulasi yang tepat untuk menginduksi bunga diluar musim. Tiga waktu strangulasi (1, 2 dan 3 bulan setelah panen, BSP) disusun menurut rancangan acak kelompok dan 6 (enam) ulangan. Hasil kajian menunjukkan bahwa waktu strangulasi 3 BSP cukup efektif menginduksi jumlah muncul bunga (83%), tetapi mempengaruhi jumlah tunas generative, kluster bunga, kuncup bunga, bunga mekar, buah terbentuk dan fruit set masing-masing 32,67; 28,17; 220,00; 143.33; 61,17 dan 39,02%. Di samping itu, rasio C/N daun pada semua perlakuan lebih tinggi dari control.
EVALUASI PROGRAM PENYULUHAN PERTANIAN DAN PENGARUH FAKTOR SOSIAL EKONOMI TERHADAP PENDAPATAN PETANI PADI SAWAH Thamrin, Muhammad; Khair, Hadriman; Ryantika, Ade
JURNAL ILMU PERTANIAN "AGRIUM" Vol 16, No 3 (2011)
Publisher : JURNAL ILMU PERTANIAN "AGRIUM"

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AbstractThe results of research using descriptive analysis shows that the agricultural extension program in Medan Krio Kecamatan Sunggal BPP is Legowo 4:1 cropping system, establishment of Gapoktan, Integrated Crop Management Field School (SLPTT), RDKK Subsidized Fertilizer and Agribusiness Program Rural (PUAP). While the research results obtained using multiple linear regression that simultaneously socioeconomic factors, education, experience, area and number of dependents are able to explain changes in income of paddy farmers at 99%. Partial factors of education and area of land affected by the real-value t count> t-table and the experience factor and the number of dependents does not affect real with t-values calculated <t-table on the  income of paddy farmers at 95% confidence level (a=5%). Key Words : Agricultural Extension Program, Income Farmers Rice
PENGARUH FAKTOR SOSIAL EKONOMI TERHADAP PENDAPATAN PETANI PINANG Thamrin, Muhammad; Herman, Surna; Hanafi, Fahrul
JURNAL ILMU PERTANIAN "AGRIUM" Vol 17, No 2 (2012)
Publisher : JURNAL ILMU PERTANIAN "AGRIUM"

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AbstractThe research was conducted using case study methods (case study). This study aims to determine how to influence the level of capital, labor, experience, education and age of farmers income levels and how the feasibility of areca nut farm. Research hypotheses are tested using multiple linear regression and the method of R / C ratio (Revenue / Cost). From the research results obtained by the R-square 0.98 identifies that it is simultaneously (synchronously) no significant effect between capital, labor, experience, education and age of the areca farmers income by 98% the rest influenced by other variables not examined. From the test results are obtained stasistik multiple R-square value of 0.99% means that overall there is a strong influence between capital, labor, experience, education and age of areca farmers income levels, it is supported by the calculated F-value> F-table at the 95% confidence level (a 0.05) thereby H0 refused and H1 accepted. No effect of partial capital, experience and age on the level of areca farmers income in this case is supported by the value t count> t-table, while the labor and education had no effect on the income level of farmers nut on a 95% confidence level. The results of the calculation, the nut farm viability obtained was R / C ratio of 1.82. This means that the nut farm is now worth the effort or can provide benefits.Keywords: sosial-economy, farmers income, farmer
PROSPEK AGRIBISNIS INDUSTRI RUMAH TANGGA TEMPE DI KOTA MEDAN Thamrin, Muhammad; Amin Nasution, Rakhmad
JURNAL ILMU PERTANIAN "AGRIUM" Vol 18, No 3 (2014): COVER
Publisher : JURNAL ILMU PERTANIAN "AGRIUM"

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Prospects for agri-research purposes fermented soybean home industry is to determine the factors that affect demand and supply fermented soybean, in this study in terms of demand and supply. Sampling method using stratified random sampling. Analysis method using multiple linear regression. The results of the study for the simultaneous demand factor is no significant effect between the level of income, tastes, number of dependents and the expectation of future fermented soybean demand is equal to 95% and 82% for supply factors simultaneously which means no real effect between prices fermented soybean, soy price , technology, and government policy towards the fermented soybean offers Calculate the value of the F-count > F-table at the 95% confidence level. Partially for demand and supply factors affect the income variable with value t count>t table while the other variable demand factors (taste, number of dependents and future expectations), supply factors (fermented soybean prices, technology and government policy) has no effect with the calculated value of t-count<t-table at the 95% confidence level. Keywords: Demand, Supply, fermented soybean
MODIFIKASI KIMIA KARET ALAM SIKLIS (CYCLIC NATURAL RUBBER/CNR) DENGAN TEKNIK GRAFTING: MENGGUNAKAN MONOMER METIL METAKRILAT DAN INISIATOR BENZOIL PEROKSIDA Siregar, M. Said; Thamrin, Muhammad; WS, Basuki; ,, Eddiyanto
JURNAL ILMU PERTANIAN "AGRIUM" Vol 17, No 3 (2012)
Publisher : JURNAL ILMU PERTANIAN "AGRIUM"

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AbstractThe research of grafting methyl methacrylate (MMA) onto Cyclic Natural Rubber (CNR) has been carried out. Benzoyl Peroxide (BPO) was used as a inisiator and temperature condition at 90oC with variation of time 1 and 2 hours. Grafting process was done with technique of reflux in a tree-neck flask  with condenser and oil bath. Spectra analysis FTIR performed for determine the presence of grafted MMA on the backbone of CNR. The results showed that the product CNR-g-MMA was formed with the marked appearance of the absorption peak wave numbers at 1731 and 1730 cm-1 (carbonyl group absorption) typical for carbonyl (C = O) of metal methacrylate. The degree of grafting increased with the increasing time grafting.Keywords: grafting, cyclic natural rubber, mathylmetacrilate, benzoyl peroxide
ANALISIS SOSIAL EKONOMI DAN PEMASARAN PERIKANAN LAUT DI KELURAHAN BELAWAN I KOTA MEDAN Thamrin, Muhammad
JURNAL ILMU PERTANIAN "AGRIUM" Vol 16, No 3 (2011)
Publisher : JURNAL ILMU PERTANIAN "AGRIUM"

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AbstractThe results showed that the value of the coefficient of determination R-square 0.93, can be interpreted that the simultaneous possession of fishing gear status factors, capital, work ethic and marketing types mentioned above were able to explain changes in fishing revenues 93%. Partially work ethic and marketing factors significantly affect the value t count> t table. While the status of the fishing gear and ownership of capital does not significantly affect the value of t calculated <t table against the income of fishermen in the 95% confidence level (a = 5%).Key words: marketing,  income of fishermen
PENGARUH FAKTOR SOSIAL EKONOMI TERHADAP PENDAPATAN PETANI JAGUNG Rangkuti, Khairunnisa; Siregar, Sasmita; Thamrin, Muhammad; Andriano, Rui
JURNAL ILMU PERTANIAN "AGRIUM" Vol 19, No 1 (2014)
Publisher : JURNAL ILMU PERTANIAN "AGRIUM"

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The aims of this study was to determine the effect of socioeconomic factors on the income of corn farmers and to know the corn farming efficiency in Lau Tawar Village, District Tanah Pinem, Dairi. Sampling method used was a random sampling method to take a simple random. Data analysis method used was multiple linear regression analysis. The results of the study based on the results of multiple linear regression analysis were significantly influence between the land and labor of the corn farmer’s income and there is no real influence or not significant between the capital, farming experience and the number of dependents of the corn farmer’s income. And based on the analysis of O/I ratio, maizefarming in the study area has been efficient.  Keywords: socio-economic factors, efficiency, revenue, corn