Judul: Kualitas Pupuk Kompos Campuran Kotoran Ayam Dan Batang Pisang Menggunakan Bioaktivator Mol Tapai
Abstrak: Growth of organic product demand result in increasing organic fertilizer demand. Two problem in producing organic fertilizer are long time producing and poor quality fertilizer. Chicken manure and banana trunk are rich in nutrient. They can be used as good material for compost producing. MOL tapai is activator to shorten compost producing times. This research is to know the effect of MOL tapai with different concentration to compost quality. This research consisted of two steps. First step was compost producing and step two is plantation test. The data from compost producing were analyzed with using completely randomized block design. The data from plantation test were are analyzed using completly randomized factorial design. Result showed that MOL tapai concentration didn’t affect pH, N, P, K of compost, but affect C quality. Plantation test showed that dosage of fertilizer affect plant height, leaf quantity, stem dryed weight, and root dryed weight. It is concluded that MOL tapai additions at different levels relative does not affect the quality of compost produced. The use of different dosages of very real effect on the productivity of crop. The use dosage of 100 g gave the best growth response.
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Judul: Taraf penggunaan mikroorganisme lokal tapai sebagai bioaktivator pembuatan pupuk organik campuran kotoran domba dengan batang pisang
Abstrak: Processing of animal waste such as sheep manure is one alternative to prevent environmental damage from animal waste. Until now, the processing of sheep manure to produce fertilizer is not optimized yet. Difficulty to get commercial bioactivator in Karawang causes this problem. To enrich the fertilizer, banana trunk could be used because of its high kalium content. This research purpose was to know the quality of organic fertilizer made using local microorganism of tapai. The data of organic fertilizer were analyzed using completely randomized design (CRD) with 3 replications. The data from planlation test were analyzed using completely randomized factorial design with 3 replications. Result showed that organic fertilizer made using activator local microorganism of tapai 1% and local microorganism of tapai 5% have same quality, but both of them have higher quality than the organic fertilizer made using activator local microorganism of tapai 10%. All plants using fertilizer have higer productivity than plant without fertilizer. It is concluded that fertiliezer usage of local mircroorganism of tapai 1% as an activator with dosage of 240 g have the higest productivity.
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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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