Judul: Budidaya tebu (Saccharum officinarum L.) lahan kering di PG Madukismo PT Madubaru Yogyakarta dengan aspek khusus pemupukan beberapa kategori tanaman tebu lahan kering
Abstrak: The internship was conducted at PG Madukismo PG Madubaru Yogyakarta beginning 14 February 2012 to 15 Mei 2012. The special purpose is study fertilization of some category of upland sugarcane at PG Madukismo PT Madubaru Yogyakarta. Fertilization in PG Madukismo is important because one in order to achieve high productivity is a good fertilizer. Most of the fields in the PG Madukismo was upland. There are two types of cultivated sugar cane that is PC (Plant Cane) and RC (Ratoon Cane) Fertilizer used in PG Madukismo is the dose recommended by the P3GI and considered by PG Madukismo and farmers. Parties responsible for the extraction of manure from the barn to the application to sugarcane was foreman and field assistant. Dosage fertilizer for PC (Plant Cane) are 11 ku/ha Madros, 5 ku/ha ZA and 5 ku/ha Phonska while for RC (Ratoon Cane) are 5 ku/ha ZA and 5 ku/ha Phonska. The data obtained were analyzed using t-test. From the results obtained for plants PC or RC I obtained the best productivity of sugarcane grown on land that has a typology mild soil type, irrigation well (pump) and the current drainage there are Kledokan field in Magelang which have productivity 598 ku /ha and Sikendal field in Temanggung which have productivity 693 ku/ha.
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Judul: Budidaya tebu (Saccharum officinarum L.) lahan kering di PG Madukismo PT Madubaru Yogyakarta dengan aspek khusus pelaksanaan pemupukan
Abstrak: Kegiatan magang dilaksanakan di wilayah kerja PG Madukismo PT Madubaru, Kabupaten Purworejo dan Kabupaten Gunungkidul sejak bulan Februari sampai bulan Juni 2015. Kegiatan magang bertujuan untuk mempelajari serta memperoleh pengalaman dan keterampilan bekerja secara nyata mengenai aspek teknis budidaya tebu. Aspek teknis yang dilakukan berupa aplikasi pemupukan pada tebu lahan kering di PG Madukismo, PT Madubaru, Yogyakarta. Petani tebu menggunakan pupuk ZA, NPK, dan pupuk organik bersubsidi yang didapat dengan mengajukan Rancangan Definitif Kebutuhan Kelompok (RDKK) Pupuk Bersubsidi. Dosis yang tercantum pada RDKK Pupuk Bersubsidi adalah ZA 6 ku ha dan NPK 4 ku ha. Petani wilayah Purworejo yang merupakan petani lama dan pada umumnya menambah sendiri dari dosis rekomendasi pada RDKK Pupuk Bersubsidi dengan dosis rata-rata ZA 7.5 ku ha¹ dan NPK 4.7 ku ha Petani wilayah Gunungkidul yang merupakan petani baru memakai dosis yang sesuai dengan RDKK Pupuk Bersubsidi. Kedua wilayah kurang efektif dalam cara pemupukan tanaman tebu. Produktivitas wilayah Purworejo lebih tinggi dibanding wilayah Gunungkidul karena pengaruh iklim, potensi lahan, dan ketepatan kegiatan budidaya.
Keyword: Gunungkidul, New farmer, Experience farmer, Purworejo, RDKK of subsidized fertilizer, Dry land, Upland sugarcane, Fertilization method, Iklim dan tanah, Budidaya tebu

Judul: Kekonsistenan Hamiltonian pada Gerak Gelombang Interfacial
Abstrak: The interfacial wave is an internal wave that occurs at boundary of two layers fluid. It appears because there is difference of mass density between the two layers. The objective of this thesis is to formulate the motion of internal wave with flat base and flat as well as free upper bound surface. The motion equation obtained is a Hamiltonian system. The Hamiltonian in this system is expressed by variable of wave deviation and horizontal component of potential velocity. Under assumption that interfacial wave moves only in one direction, it can be shown that the Hamiltonian depends on the solution of the wave motion equation. The coefficients of the equation depend on the physical characteristics of the two layers of fluid, i.e. thickness and mass density. The numerical results show that Hamiltonian in the system is constant. It is consistent with Hamiltonian characteristic, which does not depend on time.
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