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 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: 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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