Judul: Produksi Tanaman Dianthus chinensis L. sebagai Tanaman Hias Pot dan Hamparan di PT. Bina Usaha Flora, Cianjur, Jawa Barat
Abstrak: Kegiatan magang dilaksanakan di PT. Bina Usaha Flora, Cianjur, Jawa Barat mulai dari Januari hingga April 2020. Pelaksanaan kegiatan magang bertujuan untuk mempelajari dan meningkatkan keterampilan teknis dan manajerial dalam produksi komoditas dianthus di PT. Bina Usaha Flora, Cianjur. Tujuan khusus dari kegiatan magang adalah memperoleh informasi mengenai produksi, kriteria panen komoditas dianthus serta mengevaluasi kelayakan usaha tani dari komoditas tersebut. Metode yang digunakan adalah metode langsung melalui pengamatan di lapangan serta wawancara dengan karyawan perusahaan dan metode tidak langsung dengan melalui studi literatur. Pengamatan meliputi tinggi tanaman, lebar tajuk, jumlah kuntum bunga, dan analisis usahatani. Kriteria panen hasil pengamatan menunjukkan hasil yang sesuai dengan kriteria perusahaan. Nilai R/C ratio pada komoditas dianthus pot dan dianthus polybag yaitu 3,47 dan 2,53. Hasil nilai R/C ratio pada komoditas dianthus pot dan dianthus polybag menunjukkan hasil > 1 yang berarti usahatani layak dijalankan dan bersifat menguntungkan., Internship activities carried out at PT. Bina Usaha Flora, Cianjur, West Java from January to April 2020. The internship aims to learn and improve technical and managerial skills in the production of dianthus commodities at PT. Bina Usaha Flora, Cianjur. The specific objectives of the internship are to obtain information regarding production, and criteria for harvesting the dianthus commodity and, evaluate the feasibility of farming the commodity. The method used the direct method through direct observation in the field and interviews with company employees and the indirect method through literature studies. Observations included plant height, crown width, number of flower buds, and farming analysis. The observed harvest criteria show results that are the company's criteria. R/C ratio values for dianthus pot and dianthus polybag commodities were 3,47 and 2,53. The results of the R/C ratio values for the commodity dianthus pot and dianthus polybag show results > 1, which means that farming is feasible and profitable.
Keyword: dianthus, harvest criteria, polybag, pot

Judul: Production Management of Cut Chrysanthemum at  PT Alam Indah Bunga Nusantara, Cianjur, West Java
Abstrak: Krisan merupakan bunga potong dan tanaman hias pot yang populer Indonesia. PT Alam Indah Bunga Nusantara (AIBN) merupakan perusahaan produksi krisan potong yang berlokasi di Cianjur, Jawa Barat. Kegiatan magang dilaksanakan di PT Alam Indah Bunga Nusantara selama 4 bulan dimulai dari 6 Februari 2023 hingga 5 Juni 2023. Pelaksanaan magang bertujuan meningkatkan kemampuan dalam bidang teknis dan manajerial terkait pengelolaan perusahaan pertanian, khususnya pada pengelolaan produksi dan teknik budi daya untuk memproduksi krisan potong. Kegiatan yang dilakukan selama magang meliputi sebagai pekerja dalam proses budi daya, panen, pascapanen, dan pemasaran krisan potong, serta wawancara dengan karyawan perusahaan dan pengamatan di lapangan terkait produksi krisan potong. Kemampuan yang diperoleh setelah magang yaitu berupa pengetahuan dan keterampilan untuk memproduksi krisan potong dalam skala komersial. Selain itu, dilakukan studi terkait vase life krisan potong untuk mengevaluasi vase life beberapa kultivar krisan potong dari PT AIBN dan dari petani. Vase life krisan potong dari hasil produksi PT AIBN dan petani menunjukkan adanya perbedaan lama waktu, yaitu 19,40 hari dari PT AIBN dan 15,00 hari dari petani. Perbedaan vase life ini mungkin terjadi karena adanya perbedaan pemupukan, konstruksi bangunan tanam, serta kerapatan tanam antara PT AIBN dengan petani., Chrysanthemum is a popular cut flower and potted ornamental plant in Indonesia. PT Alam Indah Bunga Nusantara (AIBN) is a cut chrysanthemum production company located in Cianjur, West Java. An internship was conducted at PT Alam Indah Bunga Nusantara for 4 months starting from February 6 2023 until June 5 2023. The internship aimed to enhance skills in both technical and managerial aspects related to agricultural enterprise management, particularly in production management and cultivation techniques for producing cut chrysanthemums. The activities during internship included as a worker in cultivation, harvest, postharvest, and marketing of cut chrysanthemums, interviewing company employees and field observations on cut chrysanthemum production. The outcomes from the internship are knowledge and skills in producing cut chrysanthemums on a commercial scale. In addition, a study on cut chrysanthemum vase life was conducted to evaluate the vase life of several cut chrysanthemum cultivars from PT AIBN and from the local farmer. The vase life of cut chrysanthemums from PT AIBN and local farmer showed differences in longevity, it was 19.40 days from PT AIBN and 15.00 days from the local farmer. The differences in the vase life might have been caused by differences in fertilization, growing structures, and space density between PT AIBN and the local farmer.
Keyword: harvest, ornamental plant, postharvest, vase life

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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