Judul: Manajemen pemupukan pada tanaman kelapa  sawit (Eaeis guineensis jacq.) di kebun buatan, PT Inti Indosawit Subur, Pelalawan, Riau
Abstrak: The apprenticeship was conducted at oil palm plantation of PT Inti Indosawit Subur,Pelalawan, Riau. This internship activity was conducted from March 1st to July 1st 2011. The internship was aimed to increase knowledge on the cultivation of oil palm both technical and managerial, particularity on the management of oil palm fertilization. The study was focused on, analyzis the factors that affect the efficiency and effectiveness of fertilization on palm oil production. Data was collected from primary and secondary source. Primary data were analized on the efficiency (time, and labor), and effectiveness (the right time, right dose, right type, and the right method. PT Inti Subur Indosawit, generally has been practicing an efficient and effective fertilization management, by considering the principle of 4 R (right kind, right dosage, right time , and right method) of fertilization.
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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: Mathematical model of Hematopoietic Stem Cell in Chronic Myelogenous Leukemia with and without Therapy
Abstrak: Leukemia or blood cancer is a diverse group of neoplastic disease, characterized by the multiplication of abnormal leukocytes or malignant transformation of blood-forming cells in bone marrow and lymphoid tissues. One of the most common types of leukemia is Chronic Myelogenous Leukemia (CML), which is usually diagnosed by the presence of certain chromosomal abnormalities, the so-called Philadelphia chromosome (Ph). One of the treatments of CML is Granulocyte Colony-Stimulating Factor (G-CSF). In this paper, we discuss two Hematopoietic Stem Cell (HSC) models, i.e. HSC without treatment and HSC with G-CSF treatment. The model of HSC without treatment included three equations representing the dynamics of HSC, leukocyte and platelet. Whereas, the model of HSC with G-CSF treatment includes the previous three equations and adds two more equations representing G-CSF injection and G-CSF circulation. The stability behavior of the system approaching the equilibrium points in the simulation study is carried out using Mathematica 7.0. The simulation results show that the G-CSF treatment can successfully decrease the number of HSC, which means reducing the CML.
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