Judul: Pengaruh serasah daun jati, urea dan biostimulan terhadap rumput setaria gajah dan rumput agustin di bawah tanaman jati
Abstrak: The aim of the experiment was to study the effect of giving teak leaves compost, urea and biostimulan on the growth and production of setaria and Agustin grass planted under teak wood. This experiment using Randomized Block Design with 8 treatments and 3 replications. The data were analyzed with Analyze of Variance (ANOVA) and the significant differences were further tested by Duncan Multiple Range Test. Variables measured were the increase of stolon length, stolon number, veflikal height, tiller numbers, dry catter production and infected root percentage. The result showed that treatments significantly (P<0.01) affected the percentage of infected root of the first harvest of Agustin grass as well as setaria (P<0.05). But the were no significant effect of the treatment were found 0x1 the stolon length gain, stolon number gain, vertikal height gain, tiller numbers gain, dry matter production, and infected root percentage in the second harvest.
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Judul: Pengaruh pemberian pupuk litter ayam dan nitrogen terhadap pertumbuhan dan produksi bahan kering rumput setaria gajah
Abstrak: Suatu penelitian telah dilakukan di Kebun Percobaan Institut Pertanian Bogor, Tajur Bogor. Penelitian dimulai tanggal 12 Desember 1933 dan selesai tanggal 24 Mei 1984. Tujuan penelitian adalah untuk mengetahui pengaruh pomberian pupuk litter ayam dan nitrogen terhadap pertum- buhan dan produksi bahan kering rumput Setaria Gajah (Se- taria splendida Stapf). Pupuk litter ayam diberikan dalam tiga taraf. Taraf 0 ton/ha, 9 ton/ha dan 18 ton/ha. Pupuk nitrogen yang di- berikan dalam tiga taraf. Taraf O kg/ha, 180 kg/ha dan 360 kg/ha. Tiap kombinasi perlakuan ditanam pada unit penelitian seluas 2 x 2m. Rancangan percobaan yang digunakan adalah rancangan berblok dengan pola faktorial (3 x 3). Ilasil penelitian menunjukkan bahwa pemberian litter ayam 9 dan 18 ton/ha menghasilkan tanaman yang nyata lebih tinggi (P0.01) daripada tanpa litter ayam. Hal yang sama terjadi pula pada pemupukan urea 180 dan 360 kg/ha. Demikian pula pemberian litter ayam maupun urea menghasil- kan anakan yang nyata lebih banyak daripada tanpa pemberian litter ayam maupun urea. Namun peningkatan dosis litter ayam dari 9 ton/ha menjadi 18 ton/ha maupun poningkatan dosis urea dari 180 kN/ha menjadi 360 kg/ha tidak nyata meningkatkan pembentukan anakan. Pemberian litter ayam 9 dan 18 ton/ha menghasilkan bahan kering yang nyata lebih banyak (P0.01) daripada tanpa litter ayam. Hal yang sama terjadi pula pada pemu.. pukan urea 180 kg/ha dan 360 kg/ha. Peningkatan dosis litter ayam dari 9 ton/ha menjadi 18 ton/ha nyata mening- katkan produksi bahan kering, namun peningkatan dosis urea dari 180 kg/ha menjadi 360 kg/ha tidak nyata meningkatkan produksi bahan kering.
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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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