Judul: Pengelolaan Limbah Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Manggala-1, PT. Tunggal Mitra Plantation, Minamas Plantation, Provinsi Riau
Abstrak: The internship was conducted at Manggala-1 Estate, Minamas Plantation, Riau Province from February 10th until June 10th 2014. The aim of this internship was to improve technical and managerial skill. It was conducted using direct method (doing all practice in estate, field observation, and discussion with estate employee) and indirect method (collect all information, archives and files from estate) with waste management as a specific topic. The utilization of palm oil waste which produced from mill, such as empty fruit bunch (EFB), wet decanter solid (WDS), and palm oil mill effluent (POME), as an organic fertilizer and mulch could stimulate plant growth. In this internship, writer observed the effectivity of organic waste land application in Manggala Estate especially EFB and POME application. Overall, palm oil waste utilization could prevent environmental damage and also reduce chemical fertilizer used.
Keyword: Bogor Agricultural University (IPB), POME, land application, empty fruit bunch

Judul: Pengelolaan limbah kelapa sawit (Elaeis guineensis Jacq.) di Teluk Siak Estate PT Aneka Intipersada, Minamas Plantation, Riau
Abstrak: The internship was conducted at oil palm plantation of Teluk Siak Estate, PT Aneka Intipersada, Minamas Plantation, Riau for three months starting from February 13th 2012 to May 13 th 2012. The main purpose of this internship is to increase knowledge, skill, experience, waste product management of oil palm plantation, and to analyze waste product of palm oil as an organic fertilizer. The analysis results showed that application of empty fruit bunches(EFB) as organic fertilizer has not been able to increase the amount of nutrients on palm oil leaf and increase of palm oil production. Application of palm oil mill effluent (POME) are able to increase the amount of nutrients on palm oil leaf palm oil especially nitrogen and phosphate and a positive impact to increase production of oil palm plantations especially on the productivity (ton/ha).
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Judul: Karakteristik Bifurkasi Persamaan Schoedinger Nonlinier Kuintik Menggunakan Pendekatan Dinamika Sistem
Abstrak: Soliton merupakan gelombang soliter yang dapat mempertahankan bentuknya saat menjalar pada kecepatan konstan. Jika sebuah gelombang soliton berinteraksi dengan gelombang soliton yang lain maka keduanya akan mempertahankan profilnya masing-masing. Pada penelitian ini soliton diwakili oleh persamaan Scroedinger nonlinier kuintik (QNLS). Melalui pendekatan dinamika sistem akan digambarkan karakteristik bifurkasi persamaan QNLS. Dari hasil perhitungan diperoleh 3 titik kritis untuk (U1, U2) yaitu (-(k/σ) 1 4, 0); (0, 0); ((k/σ) 1 4, 0) harga eigen λ1,2 = ±2(k/β) 1 2 , λ1,2 = ±(-k/β) 1 2 , λ1,2 = ±2(k/β) 1 2 berturutturut untuk masing-masing titik kritis. Ketika k > 0 dan β > 0 atau k < 0 dan β < 0 diperoleh jenis titik kritis sadel, senter, sadel untuk masing-masing titik kritis. Sedangkan ketika k > 0 dan β < 0 atau k < 0 dan β > 0 diperoleh jenis titik kritis senter, sadel, senter untuk masing-masing titik kritis. Hasil ini metunjukkan bahwa sistem tidak mengalami perubahan titik kritis tetapi mengalami perubahan kestabilan pada bifurkasi persamaan QNLS.
Keyword: soliton, quintic nonlinier Schroedinger (QNLS) equation, system dynamics, bifurcation, critical points