Browsing Doctoral Dissertations (Agricultural Science) by Issue Date
Now showing items 1-20 of 102
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Evaluasi Karakteristik Fisikokimia Tanah Andisol dan Hubungannya terhadap Produksi Tanaman Kentang (Solanum tuberosum L.) di Kabupaten Karo
(Universitas Sumatera Utara, 2026)Andisol soils, which dominate the Karo Regency, have low nutrient availability and a high capacity for phosphate fixation, and these conditions often cause crops to experience nutrient deficiencies that ultimately reduce ... -
Daya Saing Ekspor Kopi dari Negara Penghasil Ke Negara Tujuan Ekspor
(Universitas Sumatera Utara, 2025)Coffee is a leading commodity with an export value of USD 1.14 billion with an export volume of 433,780 tons in 2022. The highest destination for Indonesian coffee exports is the United States with a value of USD 268.55 ... -
Skrining Kandidat Probiotik dari Dengke Naniura untuk Menurunkan Kolestrol
(Universitas Sumatera Utara, 2025)Research was conducted with the aim of obtaining lactic acid bacteria (LAB) species from dengke naniura that have the ability to reduce cholesterol. The research was carried out in several stages, each stage is done with ... -
Sintesis Trigliserida Rantai Sedang secara Asidolisis Enzimatik Berbasis Minyak Inti Sawit sebagai Bahan Pangan Fungsional
(Universitas Sumatera Utara, 2025)Medium-Chain Triglycerides (MCT) is a form of structured lipid with a composition of Medium-Chain Fatty Acids (MCFA/C6-C12) esterified on the glycerol backbone. MCT is different from Long-Chain Triglycerides (LCT) because ... -
Peningkatan Kualitas Nutrisi Larva BSF (Black Soldier Fly) Dengan Penurunan Kadar Kitin Menggunakan Asam Organik Sebagai Sumber Protein Pada Pakan Ayam Broiler
(Universitas Sumatera Utara, 2025)Quality animal feed is one of the determining factors for the success of the livestock industry and is the largest component in these business activities, which is 50-70% and the protein component has an important role ... -
Potensi Bakteri Asam Laktat (BAL) Dari Larva Lalat (Hermetia illucens) Sebagai Probiotik Alternatif Antibiotic Growth Promotor (AGP) Pada Ayam Broiler
(Universitas Sumatera Utara, 2025)Antibiotic growth promoters (AGPs) are commonly used in poultry farming to inhibit bacterial gowth and enhance chicken performance. However, AGPs have been banned in Indonesia due to their adverse effects on human health, ... -
Tumbuhan Refugia sebagai Mikrohabitat Serangga dan Sumber Ketertarikan Sycanus croceovittatus Predator Pteroma pendula (Lepidoptera: Psychidae) pada Perkebunan Kelapa Sawit
(Universitas Sumatera Utara, 2025)Octanina Sari Br Sijabat conducted a study en titled “Refugia plants as microhabitat insects and sources of interest Sycanus croceovittatus predator of Pteromapendula (Lepidoptera: Psychidae) on oil palm plantations” The ... -
Model Pemberdayaan Petani Berbasis Sistem Integrasi Usahatani Kopi-Ternak Kambing Di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)The problems faced by farmers in general are weak capital, limited land, lack of understanding, so that the level of use of agricultural inputs is not optimal, and inefficient business scale. This raises the question of ... -
Ekstrak Glukomanan dari Umbi Porang (Amorphophallus oncophyllus Prain) Sebagai Prebiotik dan Pereduksi Kolesterol pada Ayam Broiler
(Universitas Sumatera Utara, 2025)The porang tuber (Amorphophallus oncophyllus Prain) is an indigenous Indonesian tuber plant that is increasingly being cultivated due to its high economic potential. One of the main bioactive components in this tuber is ... -
Strategi Mitigasi Banjir untuk Optimasi Usahatani Padi Sawah di DAS Krueng Kluet Aceh
(Universitas Sumatera Utara, 2025)The Krueng Kluet watershed, often referred to as the Kluet watershed, is one of the largest watersheds in South Aceh Regency, Aceh Province, which currently experiences frequent flooding, thereby adversely affecting the ... -
Integrasi Spasial Pasar dan Ambang Batas (Threshold) Harga Komoditi Bawang Merah antara Pasar Perdesaan dan Pasar Perkotaan di Sumatera Utara
(Universitas Sumatera Utara, 2025)The Law of One Price states that the price of red onions in one market and in another market should differ only by the cost of transferring the commodity. Imbalances in price movements between markets (rural-urban) indicate ... -
Implementasi Precision Agriculture melalui Penyusunan Rekomendasi Pemupukan Tanaman Kelapa Sawit Berbasis Sistem Informasi Geografis (SIG) dan Teknologi Penginderaan Jauh
(Universitas Sumatera Utara, 2025)This study evaluated methods for accurate formulation of fertilization recommendations for oil palm plantations in North Sumatra Province for implementing precision agriculture. The study used geographic information systems ... -
Agroekologi dan Pengaruh Infestasi Asystasia gangetica (L.) terhadap Pertumbuhan dan Hasil Tanaman Kelapa Sawit
(Universitas Sumatera Utara, 2025)This series of studies comprehensively examined the biological, ecological, and management aspects of Asystasia gangetica (L.) T. Anderson in oil palm (Elaeis guineensis Jacq.) plantations located in the tropical lowlands ... -
Kesediaan Untuk Membayar Konsumen Dan Kesediaan Untuk Menerima Petani Cabai Merah Terhadap Label Keamanan Pangan (Studi Kasus : Konsumen Cabai Merah Kota Medan dan Petani Cabai Merah Kabupaten Karo)
(Universitas Sumatera Utara, 2025)The research employed a Discrete Choice Experiment (DCE) with a D-optimal design, involving 262 consumer respondents and 265 farmer respondents. Data were analyzed using a mixed logit model to capture preference ... -
Perbaikan Genetik Padi Gogo Lokal Aceh (Oryza sativa L.) melalui Iradiasi Sinar Gamma untuk Genotipe Umur Genjah dan Produksi Tinggi
(Universitas Sumatera Utara, 2024)Local rice cultivars that have resistance to biotic and abiotic stresses still have weaknesses in terms of long life and low production. In general, local cultivars have a relatively long lifespan when compared to superior ... -
Penurunan Kandungan Merkuri Padi Sawah pada Lahan Tercemar Merkuri di Kabupaten Mandailing Natal melalui Aplikasi Varietas Toleran dan Biochar yang Dimodifikasi
(Universitas Sumatera Utara, 2024)Mandailing Natal Regency is administratively located in the province of North Sumatra, covering an area of 662,070 hectares, with 40,051 hectares of rice fields. The Batang Gadis River, which flows for 180 km, serves as a ... -
Identifikasi Gen Embriogenik terhadap Genotipe Klon Kelapa Sawit (Elaeis guinnensis Jacq.) Produksi Tinggi dan Tahan Penyakit Ganoderma
(Universitas Sumatera Utara, 2024)Oil palm is an important tropical plant producer of vegetable oil as a source of Indonesian currency. The presence of oil palm superior seed is necessary to increase productivity. Tissue culture becomes the only vegetative ... -
Produksi dan Kandungan Minyak Atsiri Beberapa Ekotipe Akar Wangi (Vetiveria zizanioides L.) pada Beberapa Tingkat Salinitas dan Kultur Teknis dengan Asam Salisilat dan Mikoriza
(Universitas Sumatera Utara, 2024)sub-tropical areas. The quality of essential oils in Indonesia is increasingly declining. The decline in export volume and low price of vetiver oil is caused by low production and quality of vetiver oil. Planting vetiver ... -
Faktor Faktor yang Mempengaruhi Keberhasilan Implementasi Enterprise Resource Planning di Perkebunan Kelapa Sawit PT. Anugerah Langkat Makmur
(Universitas Sumatera Utara, 2024)Palm oil plantation are the sector agriculture control long-range system. This leads to the inspections of plantation work processes, as well as performance assessments, being conducted through visits to plantation/factory ... -
Produksi Biomassa dan Metabolit Sekunder Bawang Merah Samosir yang Diaplikasi PGPF Trichoderma sp.
(Universitas Sumatera Utara, 2024)Shallots are one of the leading national vegetable commodities which function as a food seasoning, used as industrial raw materials such as fried onions, flour, dry slices, wet slices, oleoresin, oil, pasta and pickles and ...