Judul: Studi Pengelolaan Gulma di Perkebunan Kelapa Sawit Sekunyir Estate, PT. Indotruba Tengah, Minamas Plantation, Kalimantan Tengah.
Abstrak: Study of weeds management at oil palm Sekunyir Estate done to study management aspect and technical aspect. Management is done with restrain weeds according to chemistry and mechanical. Weeds control according to chemistry uses herbicide Audit and Starane done in palm circle and result collecting place, inter row and harvesting path, and Imperata cylindrica. Weeds control mechanically done with manual and weeds cutting machine. Weeds control according to chemistry in palm circle and result collecting place where does herbicide use Audit smaller 5 % from estimation, herbicide Starane bigger 47.7 % from estimation, and labour smaller 10 % from estimation. Weeds control in inter row and harvesting path according to where does herbicide use Starane smaller 33.3 % from estimation, and labour smaller 28.9 % from estimation. Labour use in weeds control with manual bigger 89 % from estimation. Weeds control with weeds cutting machine where does bigger labour use 5% from estimation, smaller oil use 33.3 % from estimation and smaller petrol use 33.7 % from estimation. Weeds that grow dominant in the year plant oil palm 1992-1995 is Centotheca lappacea with value Summed Dominance Ratio (SDR) highest 12.06 % in the year plant 1992. While weeds that grow dominant in the year plant 2005 and 2007 is Asystasia intrusa with value SDR highest 16.36 % in the year plant 2007. Labour cost use in weeds control in inter row and palm circle according to lower chemistry 89.4 % than according to manual.
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Judul: Weed Management of Oil Palm (Elaeis guineensis Jacq.) in Surya Adi Estate, PT Binasawit Makmur, South Sumatra
Abstrak: The productivity of Indonesian palm oil has not reached its maximum potential. One of the reasons for this lack of productivity is the presence of weeds. Weeds have the potential to reduce yields of Fresh Fruit Bunches (FFB), so it is necessary to control them. The presence of weeds can diminish the yield of FFB; therefore, weed control is essential. Proper weed control can enhance FFB productivity. In weed control, appropriate steps are required, starting from planning, organizing, applying, and monitoring. The internship was conducted at Surya Adi Estate and Mesuji Estate, Sampoerna Agro, South Sumatra, where I served as KHL, a foreman's assistant, and an assistant supervisor. The KHL handled all technical aspects in the field, the foreman's assistant assisted the foreman in both technical and managerial tasks, and the assistant supervisor aided the assistant in managerial aspects. Primary data observation involved analyzing weed vegetation at various growth stages. The internship results indicated the application of manual and chemical weed control in accordance with company standards. The observations revealed that broadleaf weeds, such as Mucuna bracteata DC and Mikania micrantha Kunth, dominated at the TBM growth stage. Clidemia hirta D. Don, Ageratum conyzoides L., and Asystasia gangetica (L.) were prevalent at the young, adolescent, and mature stages of oil palm growth (TM). Among grassy weeds, Panicum sarmentosum Roxb was the dominant species at the TBM stage, while Cyperus rotundus L. was the most common sedge weed at the TBM growth stage, Produktivitas minyak kelapa sawit Indonesia belum maksimal. Salah satu penyebab kurangnya produktivitas yaitu gulma. Keberadaan gulma dapat menghilangkan hasil pada TBS sehingga gulma perlu dikendalikan. Pengendalian gulma yang tepat dapat meningkatkan produktivitas TBS. Dalam pengendalian gulma perlu langkah yang tepat mulai dari perencanaan, pengorganisasian, pengaplikasian, dan pengawasan. Magang bertujuan meningkatkan kemampuan teknis dan manajerial dalam budidaya di perkebunan kelapa sawit terutama dalam melakukan manajemen pengendalian gulma. Magang dilakukan di Kebun Surya Adi dan Kebun Mesuji, Sampoerna Agro Sumatera Selatan dengan menjadi KHL, pendamping mandor, dan pendamping asisten. KHL melakukan semua aspek teknis di lapangan, pendamping mandor membantu tugas mandor dalam aspek teknis dan manajerial, pendamping asisten membantu tugas asisten dalam aspek manajerial. Pengamatan data primer dengan melakukan analisis vegetasi gulma pada berbagai umur. Hasil magang menunjukkan aplikasi pengendalian gulma manual dan kimia sesuai dengan standar perusahaan. Hasil pengamatan menunjukkan jenis gulma yang ditemukan didominasi oleh daun lebar, seperti Mucuna bracteata DC, Mikania micrantha Kunth. pada umur tanam TBM. Clidemia hirta D. Don, Ageratum conyzoides L., dan Asystasia gangetica (L.) pada umur tanam TM muda, TM remaja, dan TM tua. Untuk jenis gulma rumput, yang mendominasi di umur tanam TBM yaitu Panicum sarmentosum Roxb. Jenis gulma teki paling banyak di umur tanam TBM yaitu spesies Cyperus rotundus L
Keyword: application, dominance, organization, planning, supervision

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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