Judul: Study of farm machinery in sugarcane litter management on dry land sugarcane plantation pg takalar
Abstrak: Agricultural waste in form of sugarcane litter is an organic material that can be reused as compost. To process sugarcane litter into compost take several technology that can facilitate the process. The objectives of this research were; 1) to determine the potential of sugarcane litter and to determine the machinery requirement for sugarcane litter management in PG Takalar, 2) to design an applicator for compost made of sugarcane litter that can be used for a plant cane and ratoon in dry land, 3) to identify the quality of sugarcane litter compost and to analyze the influence of the compost to soil physical and mechanical properties, soil fertility, and ratoon crop growth, 4) to analyze the benefit and feasibility of sugarcane litter management on dry land, and 5) to develop model of sugarcane litter management in determining the number of machinery used and analyzing sugarcane litter management cost, by using dynamic model. Average availability potential of sugarcane litter in PG Takalar was 19.96% or 20% from each stem of sugarcane in total, with 4 186 ha area of PG Takalar, the potential of sugarcane litter was 32 860 ton/year. The number of machinery needed to support the mechanization of sugarcane litter management were 48 units of tractor, 13 units of trash rake, 31 units of trailer, 4 units of applicator, 18 units of chopper, 3 units of truck, 3 units of composting turner and 3 units of loader. The compost produced was appropriate with SNI 2004, Agriculture Ministry Regulation No. 2/2006 and No. 28/2009. The compost application in the sugarcane plantation will reduce production cost. The use of sugarcane litter compost in 15 ton/ha dosage was equivalent with 48 kg of N. Thus, compare with urea fertilizing dosage of 600 kg/ha, the use of 15 ton/ha of compost will reduce urea fertilizer up to 17.8%. The application of compost will reduce production cost and will increase the level of C and N organics, respectively by 8% and 21% within 4 months used of compost. It is also found that, compost positively affect the soil physical and mechanical properties. Based on the growth of high and diameter stem. The feasibility analyze showed that the mechanization of sugarcane litter management through sugarcane litter management unit in each district was feasible to be developed.
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Judul: Pengomposan Blotong, Bagas dan Abu Ketel dari Industri Gula dengan Perlakuan Aerasi Aktif dan Perbedaan Nilai C/N Awal
Abstrak: Filter Cake, Bagasse and Boiler wastes in the sugarcane industry has not been used optimally. Therefore, it is necessary to studies use of composting. The purposes of study are to optimize the wastes utilization with composting and to know the influence of different active aerationrate and different initial C/N value on composting process and product. The research method using complete randomized design with two treatments, namely active aeration treatment with air drainage and passive aeration (without air drainage). The aeration active composting in the first week, then in the second week until the end of composting by air supply naturally. Composting consists of three composition based on initial C/N value, they are 30, 40 and 50. In term of active aeration rate, composting consists of two aeration rate, they are 0.8 l/kg.minute and 1.2 l/kg.minute. Parameters monitored during composting such as, temperature is done every day, pH and C/N is every week. Upon the completion of composting which is 42 days, compost is characterized to define the quality of compost and compare with SNI 19-7030-2004. The composting with aeration treatment of active and passive aeration does significantly affect the value of C/N and the different initial C/N value composition significantly affect the value of C/N by anova statistic. The compost, in physically, pH value and potassium content does meet the requirements of the compost, but it does not meet the requirements in water content, phosporus content and C/N Value, based on SNI 19-7030-2004.C/N value of the compost is 23.44 and water content is 54.56%
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Judul: Asymptotic Distribution of Estimator for the Intensity Function of a Doubly Periodic Poisson Process
Abstrak: In this manuscript, estimation of the intensity function of a doubly periodic Poisson process is discussed. It is assumed that only a single realization of the Poisson process is observed in a bounded window [0,n]. It is also assumed that the period of the intensity function is known. The rate of consistency and asymptotic normality of the estimator are formulated. Finally, a confidence interval for the local intensity function is also formulated.
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