Judul: Pengaruh konsentrasi daan frekuensi pemberian alar terhadap pertumbuhan tanaman krisan pot varietas rage
Abstrak: Persaingan pasar krisan pot yang ketat menuntut produsen untuk dapat memproduksi krisan pot yang berkualitas tinggi dengan biaya produksi yang rendah. Penampakan krisan pot menjadi hal yang sangat penting. Penilaian kualitas krisan pot terutama dilihat dari tinggi tanaman, keserempakan berbunga, keseimbangan antara tajuk, bunga dengan tinggi tanaman. Untuk mencapai tinggi yang ideal yaitu 21 cm, maka krisan pot harus dikendalikan pertumbuhannya dengan menggunakan zat penghambat tumbuh, salah satunya alar. Harga alar yang semakin tinggi menyebabkan biaya produksi krisan pot meningkat. Penelitian bertujuan mendapatkan konsentrasi dan frekuensi pemberian alar yang tepat untuk menghasilkan krisan pot varietas Rage terbaik dan dapat menekan biaya produksi. Penelitian dilaksanakan pada bulan Februari sampai April 1999, menggunakan greenhouse milik PT Saung Mirwan. Lokasi perusahaan ini terletak pada ketinggian 650-750 m dpl dengan suhu 23.7-26.5°C.
Keyword: Agronomy, Ornamental plant

Judul: Pertumbuhan Tanaman Krisan Pot (Chrysanthenumm morivolium var Rst) pada Berbagai Konsentrasi Pemupukan  dan Alar
Abstrak: Clirysanthemzon spp. are cultivated flowers as a member of Asteraceae have a high requirement of macro nutrients and regulation height with growth retardants chemical. The aims of the researclt was to find out the most accurately fertilizer concentration composition and the most compatibility of alar for growth of pot mutn (Clnysanthemunz morfolium var Rsl). This research used Randomized Complete Factorial Design consisting 2 factors i.e. concentration of fertilizer and concentration of alar by 5 replication for each. Coinbinations of fertilizer are used CaNO,, KNO,, DAP, and MgSOn. The pot mum with treatment fertilizer of 80gl1001 CaNO;, 25gI1001 KNO,, 35gl1001 DAP, 25gl1001 MgSOR, and alar of 2,5g/1 (P3A2) showed the best growth level in number of lateral buds, number of blossom flowers, diameter flower and total chlorophyll concentration. The increasing of fertilizer in this research was not significant in all treatments, except number of lateral buds. The pot mum growth with alar are significant in height of plant, number of lateral buds, internode, leaf colour, length of pedicle, and number of bud flowers.
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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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