Judul: Pengaruh penambahan pupuk soils plus terhadap produktivitas rumput Stenotaphrum secundatum (Walt) K
Abstrak: The research was aimed to find out the interaction of level salinity and soils plus fertilizer on growth and product of Stenotaphrum secundatum ( Walt.) Kuntze grasses. The research was carried out on February until July 2005 in green house of Laboratory of Agrostologi, The Faculty of Animal Science, Bogor Agriculture University. Factorial Completely Randomized Design with factorial design 2 x 5 by 3 replications was used in this research. First factor ( factor A) were soils plus fertilizer and non soils plus fertilizer, while second factor ( factor B) were level of salinity with concentration 0 ppm, 2500 ppm, 5000 ppm,7500 ppm and 10000 ppm. The result showed that soils plus have an significant effect (P<0.01) to individual number, number of stolon, stolon dry matter weight first period and second periode, and shoot dry matter weight. Salinity do not have an significant effect to number individual, root dry matter weight and shoot dry matter weight. Result from this research indicated that soils plus very required for the growth and produce Stenotaphrum sece~ndatum ( Walt.) Kuntze grasses. keywords : salinity, stolon, soils plus,rumput Stenotaphrum seczrndatum ( Walt.) Kuntze, sandy soils
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Judul: Pengaruh dosis dan frekuensi penyiraman garam terhadap produktivitas Chloris gayana Kunth dan Setaria splendida Stapf dengan media tanam tanah tambak dari marunda
Abstrak: Salt can pursue cell bisection if it was high content in land. The limited water can cause drougt stress, which can effect the growth and plant yield. The experiment was conducted to study the influence of salinity and frequency of salt springkler to Chloris gayana and Setaria splendida productivity. The experiment was conducted in Laboratory of Agrostology greenhouse, Faculty of Animal Science, Bogor Agriculture University. The experiment was design in completely randomized design with two factor (3x4) and 3 replication.
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Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix