Judul: Permodelan Pertumbuhan dan Produksi Kelapa Sawit Pada Berbagai Taraf dan Periode Penunasan Pelepah
Abstrak: The number of leaf frond influence oil palm yield, especially fresh fruit bunch weight and production. The objective of this research was to obtain oil palm growth and production model for different levels and periods of frond pruning. The experiment was conducted at PT. Astra Agro Lestari, Pangkalan Bun, Central Kalimantan, from August 2011 to February 2012. The experiment was arranged in randomized block design with two factors and three replications. The first factor was numbers of unpruned frond and the second factors was pruning periods. The frond treatments consisted of 41-48, 49–56, and 57–64 fronds. The periods of pruning treatment consisted of first period (early to mid rainy season):September– December, second period (mid to end of rainy season):Januari–April, and third period (dry season):May–August. Model has been able to predict 75% variable for production and fresh fruit bunch weight for different levels and periods of pruning.
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Judul: Identifikasi Parameter Agronomi untuk Pengembangan Taksasi Produksi Kelapa Sawit (Elaeis guineensis Jacq.) di Angsana Estate, PT. Ladangrumpun Suburabadi, Minamas Plantation, Tanah Bumbu, Kalimantan Selatan.
Abstrak: The purpose of this final assignment was to determine agronomic and agroecological characters responsible to production estimation of oil palm fresh fruit bunches. The studies was conducted at PT. Ladangrumpun Suburabadi, Minamas Plantation, District of Tanah Bumbu, South Kalimantan from February 15th to June 15th 2010. The assignment composed of several works, i.e., as field worker for two months, as assistant foreman for one month, and as estate assistant for one month. Special observation was conducted as additional activity, e.g. to examinate the agronomic and agroecological characters which were expected affected oil palm production such as climates, land suitability, and agronomy of oil palm. According to test of t-parcial, indicated that climatic factors played an important role in the production of oil palm. Air humidity in the 6 months prior to harvest (MPH), the sun shines intensities on 18 MPH, rainfall on 6 MPH, rainy days on 18 MPH, water deficit at 0 and 24 MPH, as well as plant age and fertilizer including the factors determining the production of oil palm. Production forecasting modeling performed by multiple linear regression analysis, from the seven variables significantly affected the production of oil palm, of which obtained six combination of regression. Multiple linear regression equation no. VI was the closest to actual production. This multiple linear regression equation VI can be used to predict the annual production of oil palm in Angsana Estate for 5-11 years old plants by adding up monthly production forecast for a year. It is note worthy that regression equation VI dependent on fertilizer aplikation, number of rainy days and sunshine at 18 MPH, water deficit at the 24 MPH, and present plant age data.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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