Judul: Weed Management of Oil Palm (Elaeis guineensis Jacq.) at Negeri Lama Selatan Estate, PT Hari Sawit Jaya, North Sumatera
Abstrak: Pengelolaan gulma pada kelapa sawit merupakan suatu strategi dalam kegiatan pengendalian gulma yang terdiri atas tahap perencanaan, pengawasan, dan pengontrolan untuk mencapai hasil pengendalian gulma yang efektif, efisien, dan berkelanjutan. Kegiatan magang dilaksanakan pada Januari hingga Mei 2022 yang berlokasi di Kebun Negeri Lama Selatan, PT Hari Sawit Jaya. Kegiatan magang memiliki tujuan umum dalam meningkatkan pengetahuan dan pengalaman kerja pada perkebunan kelapa sawit serta tujuan khusus dalam menganalisis jenis gulma dominan, mempelajari terkait pengelolaan pengendalian gulma dan penerapan aspek 5 tepat kelapa sawit. Hasil pengamatan diperoleh dengan menggunakan metode langsung dan tidak langsung. Hasil pengamatan data primer berdasarkan perhitungan NJD, gulma Cynodon dactylon (36,43%) dan Asystasia gangetica (25,24%) mendominasi areal tumbuh kelapa sawit. Kegiatan kalibrasi alat perlu disesuaikan dengan standar perusahaan berdasarkan hasil uji t-Student pada taraf 5%. Penerapan dosis metil metsulfuron tanaman-1 dan realisasi lebar semprot pada areal piringan dan pasar pikul sudah memenuhi standar ketepatan perusahaan berdasarkan hasil uji t-Student pada taraf 5%. Ketepatan cara semprot dan aplikasi bahan aktif sudah mencapai nilai rata-rata persentase 93,33% dan 100% yang tergolong pada tingkat yang sangat baik. Pelaksanaan waktu semprot telah terlaksana dengan tepat yang didasarkan pada sistem perencanaan yang baik. Pengelolaan gulma telah dilaksanakan dengan keberlanjutan melalui perencanaan identifikasi gulma dan jadwal pengendalian, pengawasan teknis, pengontrolan kualitas hasil pengendalian, penerapan aturan dalam penggunaan bahan kimia, dan pengoptimalan mempertahankan gulma penting (Nephrolepis biserrata) untuk habitat predator ulat api. Kematian total gulma Asystasia gangetica efektif pada hari ke-20 HSA dengan konsentrasi 0,3% metil metsulfuron. Penggunaan APD tergolong dalam kategori sangat baik berdasarkan rata-rata persentase penggunaan yang mencapai 93,33%. Keterampilan aplikasi waktu semprot dipengaruhi oleh usia berdasarkan uji F pada taraf 5%. Pengawasan terhadap kondisi alat semprot penting dilakukan untuk mengoptimalkan keefisienan penggunaan biaya pengendalian., Weed management in oil palm is a strategy in weed control consist of planning, monitoring, and controlling stages for effective, efficient, and sustainable weed control. The internship activity was carried out from January to May 2022 and it was located at Negeri Lama Selatan Estate, PT Hari Sawit Jaya. Internship activities have general goals of increasing knowledge and work experience in oil palm plantations and specific goals in analyzing dominant weed types, supervising of weed control management, and using the 5 right aspects of weed control in oil palm. Observation results were obtained using direct and indirect methods. The results of primary data observations based on NJD calculations, Cynodon dactylon (36.43%) and Asystasia gangetica (25.24%) weeds that dominated in the oil palm growing area. Calibration activities need to be adjusted to company standards based on the results of the t-student test at the 5% level. The application of metsulfuron-methyl dose of plant and spray width in the weeded circle and in row area has met the company's standard accuracy based on the results of t-student at a 5% level. The accuracy of the spray method and the application of active ingredients have reached an average percentage of 93.33% and 100% which is classified as a very good level. The implementation of the time has been carried out correctly is based on a good planning system. Weed management has
Keyword: Gulma, Kalibrasi, Keterampilan kerja, Lima tepat

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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