Judul: Manajemen Pemupukan Kelapa Sawit (Elaeis guineensis Jacq.) di PT. Perdana Inti Sawit Perkasa I, First Resources Ltd., Rokan Hulu, Riau
Abstrak: Apprenticeship aims to increase knowledge about the cultivation of palm oil to obtain the work experience and skills on oil palm cultivation. Internship was conducted at Afdeling II PT. Perdana Inti Sawit Perkasa I, Sei Air Hitam Estate, First Resources Ltd., Riau Province in 10 February-10 June 2014. Internship activities included, work in the field as laborer, assisten as supervisor and field manager. Management of fertilization was analyzed base on four concep : proper in term of kind, proper in term of dosage, proper interm of time of application and proper in application technique. Secondary data were collected from literature and field division archives such as monthly and annuals reports, as well as documentation of the field. Generally fertilization in Sei Air Hitam Estate do not fully the of concept four proper fertilization. Work with good quality are needed to be incresed.
Keyword: Bogor Agricultural University (IPB), fertilization manajement., right time, fertilizer dosage

Judul: Manajemen Pemupukan Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) di PT. Perdana Inti Sawit Perkasa I, First Resources Ltd., Rokan Hulu, Riau
Abstrak: Apprenticeship aims to increase knowledge, about the cultivation of oil palm. To obtain the work experience and skills on oil palm cultivation. Internship was conducted at Afdeling III PT. Perdana Inti Sawit Perkasa I, Sei Air Hitam Estate, First Resources Ltd., Riau Province in February-June 2013. Internship activities are enducated though management, mount level experiences of lower class labour, supervisor (foremen) and field assistant. Management of fertilization was analyzed base on four raights concept : right kind, right dosage, right time, right place dan method of application. Secondary data were collected in the form of literature and field devision archives such as monthly, annuals reports, as well as documentation of the field. Generally fertilization in Sei Air Hitam Estate was not fully the of concept four rights. Workforce swith good quality are needed to be improved.
Keyword: fertilization manajement, fertilizer dosage, right time.

Judul: Persamaan Geodesik Black Hole dengan Metrik Kerr 4+1 Dimensi dalam Koordinat Waktu Kosmik
Abstrak: Persamaan geodesik black hole dengan metrik Kerr 4+1 dimensi dalam koordinat waktu kosmik merupakan interpretasi lain dari persamaan geodesik black hole dengan metrik Kerr 4+1 dimensi, dimana acuan waktu yang digunakan diubah dari koordinat waktu wajar (proper time) ke dalam koordinat waktu kosmik (cosmic time). Waktu kosmik merupakan koordinat waktu yang dimana pengamat bergerak mengikuti ekspansi dari alam semesta. Penelitian ini merekonstruksi persamaan geodesik black hole dengan metrik Kerr 4+1 dimensi yang telah ditemukan pada penelitian sebelumnya menjadi persamaan geodesik yang memiliki fungsi terhadap dimensi waktu (t). Hasil akhir dari transformasi persamaan dapat digunakan sebagai bahan studi pustaka untuk penelitian lebih lanjut mengenai persamaan geodesik black hole dalam koordinat waktu kosmik.
Keyword: Dimensi ekstra, Metrik Kerr, Persamaan geodesik, Waktu kosmik