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All Journal Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Agrosains: Jurnal Penelitian Agronomi Agroprimatech Journal of Agrotechnology and Sustainability
Nurdin Sitohang
Program Study Of Agrotechnology, Faculty Of Agriculture, Universitas Katolik Santo Thomas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Pembiakan Anakan (Sucker) Pisang Barangan (Musa paradisiaca L.) Secara in Vitro Nurdin Sitohang
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 13, No 2 (2008): June 2008
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v13i2.2679

Abstract

Pisang (Musa paradisiaca L.) termasuk Famili Musaceae, berasal dari Asia Tenggara dan tersebar di seluruh dunia. Pisang barangan sangat digemari karena rasanya enak, vitaminnya cukup, dan harganya terjangkau. Secara konvensional pisang diperbanyak dengan anakan (sucker) dan bonggol (bit), dapat dihasilkan 1-10 anakan dalam setahun (Meina, 1992). Perbanyakan pisang barangan secara in vitro dapat dilakukan untuk mendapatkan bahan tanaman yang lebih baik, khususnya yang bebas penyakit Fusarium sp dan Pseudomonas sp.
Application of Organic and Inorganic Fertilizer to Percentage of Attacks of Ganjur Pest (Orseolia oryzae) in Rice Arkhiadi Benauli; Nurdin Sitohang; Yunda Gusriani; Jaya Febrianto Hutasoit
Agrosains : Jurnal Penelitian Agronomi Vol 25, No 1 (2023): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v25i1.72482

Abstract

Rice plants are a staple food for Indonesian people. Low crop productivity causes farmers to feel at a loss. Low rice yields are also caused by pests that attack plants, one of which is ganjur (Orselia oryzae). Efforts must be made to suppress the ganjur attack by trialling fertilizer application to rice plants. Research was conducted to determine the effect of fertilizer application in reducing the percentage of Orseolia oryzae attacks on rice plants. The method used in this research used a randomized block design (RBD) with 1 treatment factor, namely the type of fertilizer. The treatment levels for the types of fertilizer used are as follows: F0: control; F1: Cow dung; F2: Composted Organic Fertilizer; F3: Single NPK Fertilizer, P4: Compound NPK Fertilizer (16:16:16). The research began with making organic fertilizer (cow dung and compost), planting, applying treatment, collecting data, and analyzing observation data. The research results show that the application of cow dung fertilizer provides the best results compared to other fertilizers. The application of cow dung fertilizer produced the highest data based on the observed variables in this study, namely number of tillers, number of panicles, weight of 1000 grains, production per plot and reduced percentage of gallbladder pest attacks. Based on this research, the application of cow dung fertilizer can suppress attacks by ganjur pests (Orselia oryzae) while increasing the productivity of rice plants.
PENGARUH PEMBERIAN PUPUK ORGANIK DAN ANORGANIK TERHADAP PERTUMBUHAN, PRODUKSI DAN PERSENTASE SERANGAN HAMA GANJUR (Orseolia oryzae) PADA TANAMAN PADI (Oryza sativa L.) Arkhiadi Benauli; Sitohang, Nurdin; Yunda Gusriani; Hutasoit, Jaya Febrianto
Agroprimatech Vol. 7 No. 2 (2023): Agroprimatech
Publisher : Prodi Agroteknologi Fakultas Agro Teknologi Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/agroprimatech.v7i1.4264

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk dalam menekan persentase serangan Orseolia oryzae pada tanaman padi. Metode dalam penelitian ini menggunakan rancangan acak kelompok (RAK) dengan perlakuan sebagai berikut: F0: kontrol; F1: Kotoran sapi; F2: Pupuk Organik Kompos; F3: Pupuk NPK Tunggal, P4 : Pupuk NPK Majemuk (16:16:16). Penelitian dimulai dengan pembuatan pupuk organik (kotoran sapi dan kompos), penanaman, penerapan perlakuan, pengumpulan data, dan analisis data observasi. Hasil penelitian menunjukkan bahwa pemberian pupuk meningkatkan jumlah anakan, jumlah malai, bobot 1000 butir, produksi per plot dan menurunkan persentase serangan hama Ganjur (Orseolia oryzae). Kotoran sapi adalah perlakuan terbaik.
KARAKTERISTIK BUAH DAN BIJI KAKAO (Theobroma cacao L.) PADA BERBAGAI ALTITUDE DI DATARAN TINGGI HUMBAHAS Sitohang, Nurdin
AGROSUSTAIN Volume 1 Nomor 2 (2023)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v2i1.3581

Abstract

The cocoa beans of small holder were usually still low quality, one of it caused by planting location of various altitude. The focus of this research were characteristic of cocoa pod and beans on several altitudes in Humbahas highland. The research method were survey as purposive sampling on four altitudes as 865, 960, 1030, and 1118 m from sea levels. The observed parameters were pod size, pod diametre, pod volume, dry weight of pods, dry weight of kolven, dry weight of beans, bean count per pod, and dry weight per bean at 4 different altitudes in Humbahas highland (>800 m asl) with 10 pods (replications) at each altitudes. The results of research showed that: pod size increased, pod diametre increased, pod dry weight increased, dry weight of beans increased, bean count per pod increased, and dry weight each bean increased with the increasing of altitude. The best pods and beans were at altitude of 960 m asl, namely fruit length 18.10 cm, fruit dry weight 85,92 g, beans dry weight 39,02 g, number of beans per fruit 38,7 and average weight per bean 1,02 g. The physical characteristics of cocoa pods and beans are still in the normal category.
Karakteristik Buah dan Biji Kakao (Theobroma Cacao L.) pada Berbagai Altitude di Dataran Tinggi Dairi Sitohang, Nurdin; Marbun, Arjun
AGROSUSTAIN Volume 2 Nomor 2 (2024)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v2i2.4618

Abstract

The cocoa productivity is currently quite low quantity (454 kg ha-1) and quality, one of it caused by planting location of various altitude especially the highlands. The focus of this research were characteristic of cocoa pod and beans on several altitudes in Dairi highland. The research method were survey as purposive sampling on four altitudes as 860, 940, 1040, and 1120 m from sea levels (asl). The observed parameters were pod size, pod diametre, pod volume, dry weight of pod, dry weight of kolven, dry weight of beans, bean count per pod, dry weight per bean, pods value, and bean yield at 4 different altitudes in Dairi highland (>800 m asl) with 10 pods (replications) at each altitudes. The results of research showed that the increasing of altitude caused the decresed of pod size, pod diametre, pod dry weight, dry weight of beans, bean count per pod, dry weight each bean, pod value, and bean yield. The best pods and beans were at altitude of 860 m asl, namely fruit length 18.3 cm, fruit dry weight 118.6 g, beans dry weight 48.3 g, number of beans per fruit 43.7 and average weight per bean 1.10 g. The physical characteristics of cocoa pods and beans are still in the normal category.
Pemupukan N.P.K.Ca.Mg Berimbang dengan Prinsip Empat Tepat terhadap Kakao Produktip (Theobroma Cacao L.) KLON TSH 858 Sitohang, Nurdin; Harahap, Erwin M.; Hanum, Chairani; Siregar, Tumpal H.S.; Siregar, Hasril
AGROSUSTAIN Volume 3 Nomor 1 (2025)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v3i1.4626

Abstract

Cocoa productivity and its quality are still low (<2 tons ha-1), in order to increase its productivity through fertilization, it is necessary to be tested by using balanced N.P.K.Ca.Mg fertilizer with right formula and dosage. The research was done by 3 field experimental series at the cocoa seed farm (TSH 858 clone) owned by IOPRI at Sei Pancur, Deli Serdang on the altitude of 72 m. The research studies were: (1) the influence of balanced N.P.K.Ca.Mg fertilization; (2) the influence of formula and dosage of N.P.K.Ca.Mg of 12,5 : 10,9 : 16,4 : 10,3 : 4,6 and 12,9 : 11,4 : 16,8 : 10,6 : 4,8; and (3) the influence of the time of applying balanced N.P.K.Ca.Mg fertilization of 12,9 : 11,4 : 16,8 : 10,6 : 4,8 with pruning on cocoa flushing, flowering and pod reserves. The research method included: (1) non-factorial group random design with 6 levels of balanced N.P.K.Ca.Mg fertilization, for research-1; (2) nested factorial group random design with 2 levels (the best) of balanced fertilizer formula and 4 levels of dosage ratio (80%-140%), for research-2; and (3) non-factorial group random design with 4 levels of the time of applying balanced N.P.K.Ca.Mg fertilization related to heavy pruning, for research-3. Research-1 showed that, balanced N.P.K.Ca.Mg 12,5 : 10,9 : 16,4 : 10,3 : 4,6 and 12,9 : 11,4 : 16,8 : 10,6 : 4,8 fertilization indicated the better result on number of flower and pod reserves. Research-2 showed that, the formula of N.P.K.Ca.Mg fertilizer of 12,9 : 11,4 : 16,8 : 10,6 : 4,8 which tended to have the highest ratio of dosage (1,120 g plant-1) indicated the best result on number of flower and pod reserves. Research-3 showed that, application of fertilization 2 weeks after pruning indicated the best result. Potential yields can be increased from 680 kg ha-1 by tentative fertilization to 6,180 kg ha-1 by balanced N.P.K.Ca.Mg 12.9: 11.4: 16.8: 10.6: 4.8 fertilization.
EKSTRAK DAUN PANDAN WANGI (PANDANUS AMARYLLIFOLIUS ROXB.) DALAM MENGENDALIKAN ULAT GRAYAK (SPODOPTERA LITURA F.) DI LABORATORIUM Benauli, Arkhiadi; Sitohang, Nurdin; Gusriani, Yunda; Harefa, Syukur Berkat
AGROSUSTAIN Volume 1 Nomor 1 (2023)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v1i1.2480

Abstract

This research was conducted at the Biology Laboratory, Faculty of Agriculture, Universitas Katolik Santo Thomas, Medan. This study aims to determine the potential of fragrant pandan leaf extract as a vegetable pesticide in controlling armyworm pests. This study used a non-factorial completely randomized design (CRD). The treatment factor was fragrant pandan leaf extract (Pw) which consisted of 5 treatments and 4 replications, namely: Pw0 = (control/without giving fragrant pandan leaf extract), Pw1 = 20 ml of fragrant pandan leaf extract, Pw2 = 40 ml of pandan leaf extract fragrant, Pw3 = 60 ml of fragrant pandan leaf extract and Pw4 = 80 ml of fragrant pandan leaf extract, each treatment added with 100 ml of distilled water. The results showed that the highest percentage of mortality (100%) at 108 hours after application (JSA) was found in the treatment of 80 ml of fragrant pandan leaf extract + 100 ml of aquadest. The fastest death time of 50% of armyworms was found in the treatment of 80 ml of fragrant pandan leaf extract + 100 ml of aquadest, which was 30 JSA.
PRODUKTIVITAS SAWIT DAN EVALUASINYA (PALM PRODUCTION AND EVALUATION) Sitohang, Nurdin
AGROSUSTAIN Volume 1 Nomor 1 (2023)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v1i1.2484

Abstract

The average potency of palm production were 24, 22, 20, and 18 ton fruit fresh bunch (FFB) each year along 25 years in class of land 1, 2, 3 and 4. In fact, the real production of palm is often below of planning (estimation). Production evaluation ought to be done as dayly, weekly, monthly, threemonthly, sixmonthly, and yearly. Several points of production evaluation of palm as like: comparing with last year production, tendency of production, palm condition in field, maintainance of palm, harvest system, and solving some problems in field. The object of production evaluation would be done with overall of plantation, every afdeling, groups of years planting (groups of age plantings), and every blocks land area. The result of evaluation would be used as based information to repair/maintain palm, to increase the product and to stabilize the high product, or in other term to optimize the production as good as land potency.
UJICOBA PERPADUAN MEDIA TANAM COCOPEAT -TOPSOIL DAN DOSIS PUPUK SP-36 TERHADAP PERTUMBUHAN TANAMAN KEDELAI HITAM MALIKA (GLYCINE SOJA. L) Sipayung, Patricius; Sitohang, Nurdin; Purba, Andre Hartono
AGROSUSTAIN Volume 1 Nomor 1 (2023)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v1i1.2485

Abstract

The research aims to test the media plant cocopeat-top soil as well dose SP-36 fertilizer against growth soya bean black malika (Glycine soja.L ). To know the impact of the growth of oil palm seedlings (Elaesis guineensis Jacq.) in dose using rice husk charcoal biochar on some type of soil in pre- nursery. The research uses the Design Random Factorial (DRF) consist of 2 factors . The first factor is a mixture of cocopeat - top soil planting media . The second one is SP-36 dose . Based on the results of the study, it can be stated that, cocopeat planting media with topsoil had no significant effect on plant height at 4, 5, 6 and 7 mst, significantly affected the number of branches aged 7 and 8 mst and plant root length, but had no significant effect on flowering age, weight of 100 seeds, and number of root nodules. The dose of SP-36 fertilizer had no significant effect on plant height at the ages of 2, 3, 8, 11, 12 and 13 mst, flowering age, weight of 100 seeds and root length, but had no significant effect on number of branches and number of root nodules. The interaction of cocopeat growing media with topsoil and the dose of SP-36 fertilizer had no significant effect on all observed parameters .The dose of SP-36 fertilizer had no significant effect on plant height at 2, 3, 8 11 and 12 mst, flowering age, weight of 100 seeds and root length, but had no significant effect on number of branches and number of root nodules.
KARAKTERISTIK BUAH DAN BIJI KAKAO (Theobroma cacao L) PADA BERBAGAI ALTITUDE DI DATARAN TINGGI SAMOSIR Sitohang, Nurdin; Benauli, Arkhiadi; Sitanggang, Peby; Zagoto, Fran A.
AGROSUSTAIN Volume 1 Nomor 2 (2023)
Publisher : LPPM Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/agrosustain.v1i2.2889

Abstract

The cocoa beans of small holder were usually still low quality, one of it caused by planting location of various altitude in highland. The focus of this research were characteristic of cocoa pod and beans on several altitudes in Samosir highland. The research method were survey as purposive sampling on five altitudes as 815, 930, 1.073, 1.300, and 1.350 m above sea levels (asl). The observed parameters were pod size, pod diametre, pod volume, dry weight of pods, dry weight of kolven, dry weight of beans, bean count per pod, and dry weight per bean at 5 different altitudes, in Samosir highland (>800 m asl) ie: 815, 930, 1.073, 1.300, and 1.350 m asl, with 10 pods (replications) at each altitudes. The results of research showed that: pod size increased, pod diametre increased, pod dry weight increased, dry weight of beans increased, bean count per pod increased, and dry weight each bean increased with the increasing of altitude. The best pods and beans were at altitude of 1.350 m asl, namely fruit length 19.20 cm, fruit dry weight 92.65 g, beans dry weight 47.73 g, number of beans per fruit 40.5 and average weight per bean 1.20 g. The physical characteristics of cocoa pods and beans are still in the normal category.
Co-Authors Arkhiadi Benauli Arkhiadi Benauli Benauli, Arkhiadi Chairani Hanum Chairani Hanum Ginting, Erika Afulina Br Gusriani, Yunda Harahap, Erwin M. Harefa, Syukur Berkat Hutasoit, Jaya Febrianto Hutauruk, Sixtus Jaya Febrianto Hutasoit Marbun, Arjun Patricius Sipayung, Patricius Purba, Andre Hartono Siregar, Hasril Siregar, Tumpal H.S. Sitanggang, Peby Yunda Gusriani Yunda Gusriani Zagoto, Fran A.