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Hamzah Manurung
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Agriculture, Biological Sciences & Forestry Environmental Science Social Sciences Other

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The THE EFFECTS OF COMPOSTS AND NPK DOSAGE TO THE GROWTH OF OIL PALM (Elaeis guineensis Jacq) AT MAIN NURSERY Siahaan, Megawati; Hamzah Manurung; Emil Adolf Behring Silalahi
Agro Estate Vol 8 No 2 (2024): Desember 2024
Publisher : Institut Teknologi Sawit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47199/jae.v8i2.262

Abstract

One of the problems in nursery is difficulties to find topsoil and  using of subsoil will be alternative. The objectives of this research were knowing the effects of kinds of compost, compound NPK dosage and interaction of them at oil palm in main nursery. Randomized block design was used with kinds of compost (J) and compound NPK dosage (D) as treatments; without compost (J1),  rice straw compost (J2), sawdust compost (J3) and empty palm oil bunches compost (J4); without compund NPK (D0), ½ of recomendation compound NPK dosage (D1), ¾ of  recomendation compound NPK dosage (D2) and ¾ of recommendation compound NPK dosage (D3); The research shows that height of plant at 6-12 weeks after planting, amount of leave at 10-12 weeks after plantings, stem diameter 7-12 weeks after planting,  fresh weight of  shoot and root at 12 weeks after plantings are significantly affected by kinds of compost (J). Heigh of plants at 6-12 weeks after plantings, stem diameter at 6-12 weeks after plantings, fresh and dry shoot weight at 12 weeks after planting are significantly affected by Compound NPK dosage.  Heigh of plants at 7-12 weeks after planting, stem diameter 3-5 weeks after planting, dried roots weight at 12 weeks after planting are affected by interaction of kinds of compost and  compound NPK dosage. J3 as compost from oil palm empty bunch; D3 as recommendation dosage compound NPK and K3D2 is better than the others.  
The Effect of Discipline and Work Ability Among Harvesters on Work Performance in Division II of the Adolina Plantation, PT. Perkebunan Nusantara IV Regional II Rahmat Triandi; Hamzah Manurung
Jurnal Ragam Pengabdian Vol. 3 No. 2 (2026): Mei-Agustus, Sustainable Development Goals (SDGs): Multidisciplinary Perspectiv
Publisher : Lembaga Teewan Journal Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62710/ef07sd25

Abstract

Plantation companies have a culture of enhancing work discipline and the work performance of each of their employees. In the development of an organisation within a company, this is naturally implemented and has become standard practice. At Adolina Plantation, Division II of PT Perkebunan Nusantara IV Regional II served as one of the sites for this research. The conclusions drawn from the research indicate that several assessments were carried out, namely work discipline, work attitude and work performance. The findings of this research indicate that, by examining the performance of the harvesters, their performance has a positive impact on the plantation’s productivity in the long term; work discipline influences the assessment process, thereby providing recognition to each harvester; and work ability yields increasingly better results, with the harvester’s work ability ultimately leading to improved work performance.
Co-Authors Emil Adolf Behring Silalahi Rahmat Triandi Siahaan, Megawati