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COCOS
Published by Universitas Sam Ratulangi
ISSN : -     EISSN : 27150070     DOI : 10.35791
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal ini memuat materi yang berkaitan dengan Pertanian. Menyangkut Tanah, Budidaya Pertanian, Proteksi Tanaman, Teknologi Pertanian dan Sosial Ekonomi Pertanian
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 831 Documents
 72   73   74   75   76 
ANALISIS EKONOMI MESIN PERONTOK (POWER THRESHER) KEDELAI TIPE MPT 001 Putria G. Rompas; Robert Molenaar; David P. Rumambi
COCOS Vol. 13 No. 3 (2021): EDISI JULI-SEPTEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i4.35082

Abstract

AbstractThis study aims to analyze the economy, total costs and economic feasibilityof the soybean threshing process using the power thresher MPT 001 Type atLolah Satu Village, East Tombariri District, Minahasa Regency. Break evenpoint value or operational break even point of the power thresher MPT 001Type is at an operating level of 17.866,53 kg/year or equivalent to Rp.7.878.577/year. Analysis of the operational feasibility of the power thresherMPT 001 Type based on the amount of service potential available using acommercial scale calculation base is, resuted NPV value of Rp.302.056.654,69, the IRR of 195,982%, the B/C ratio of 1.4497. This conditionshows that the power thresher MPT 001 Type is economically feasible. Basedon the existing condition on site the machine does not fulfil the operationconditions that guarantee sustainability. The sensitivity analysis shows thatchanges in the level of working hours per year and the price of drying servicesare very influential on the feasibility of operations with the lowest level beingthe service price of 1.1 times the total cost of threshing services.Keywords: economics analysis. power thresher, soybean
ANALISIS EKONOMI MESIN PENGOLAH NIRA AREN MENJADI GULA SEMUT DI KELOMPOK TANI KARYA TANI DI DESA TALAITAD Nikita V. Momongan; Robert Molenaar; Esry O. H. Laoh
COCOS Vol. 13 No. 3 (2021): EDISI JULI-SEPTEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i4.35086

Abstract

AbstractThe purpose of this study is to analyze the economy, total costs and economicfeasibility of the of palm sugar processing machine HORJA MPN20 concerning the total costof processing, and economic feasibility is assessed from 4 criteria, namely: BEP, NPV, B/CRATIO, and IRR used by farmer groups in Talaitad Village, Suluun Tareran Subdistrict,South Minahasa Regency. The results showed an analysis of the operational feasibility of sappalm into palm sugar based on the amount of potential services available and using the basisof commercial business scale calculation resulted in a Net Present Value (NPV) ofRp.153,130,851.72, Internal Rate of Return (IRR) of 97%, Benefit/Cost Ratio (B/C Ratio) of1.32 and Break Even Point of operation of palm sugar processing machine MPN20 are at anoperating rate of 116.50kg/year or equivalent to Rp.4,653,142.02/year.Key words: economics analysis, palm sugar, processing machine of palm sugar
RESPON PEMBERIAN LIMBAH KELAPA SAWIT (Solid) TERHADAP TANAH MARGINAL DENGAN INDIKATOR TANAMAN BAYAM (Amaranthus tricolor L.) Dona J Nadeak; Karamoy Lientje Th; Wiesje J.N. Kumolontang
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35330

Abstract

ABSTRACTThe response of spinach as an indicator. (Amaranthus tricolor L.) grown on marginal soil givenpalm oil waste (solid) is the aim of this study. A completely randomized design (CRD) consistingof four treatments i.e., P0 (Control), P1 10 tons/ha, P2 20 tons/ha, P3 30 tons/ha in threereplicates were used during three month trials. The observed variables were plant height,number of leaves, and fresh weight of spinach plants.The results showed that the need forappropriate technology application of plam oil solid waste and its soil management systems onmarginal soils can improved the performance of the grown spinachs on this soil. The applicationof palm oil waste (solid) has a significant effect on the growth of spinach plants in terms of plantheight and number of leaves at the age of 3 WAP (Week After Planting) and of 4 WAP.Treatment of 20 tons of oil palm solid per ha gave the highest yield on plant height and numberof leaves. Furthermore, the fresh weight of spinach plants given 30 tons of oil palm solid per hagave the heaviest weight at 4 WAP.Key words : marginal soils, palm oil waste (solid), spinach plants
KARAKTERISTIK HABITAT DI SARANG TANGKASI (Tarsius Spectrumgurskyae) DI TAMAN HUTAN RAYA GUNUNG TUMPA H.V. WORANG, SULAWESI UTARA Sahdin Sapsuha; Johny S. Tasirin; Saroyo Sumarto
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35389

Abstract

ABSTRAK This study aims to determine th characteristics of the habitat in the nest of Tangkasi (Tarsius spectrumgurskyae) in the Gunung Tumpa Forest Park HV Worang. The research was carried out from October to November 2020. In collecting the tangkasi nest data, the observations were divided into three stages, namely: 1. Determination of nests. 2. Observation of nest characteristics and 3. Observation of the condition of the nest environment. This observation was carried out in the afternoon until the evening, namely at 16-30 - 18-30 and at dawn, namely at 04-30-06:00 WITA. The results of the study have obtained the location of the coordinates of the tangkasi nests as many as 8 nests spread over several types of land cover in the Tahura area of Gunung Tumpa HV Worang. The types of nest plants that make up Tarsius spectrumgurskyae are found in the Ficus and Arenga genera. The nest structure consists of cavities in the interweaving of roots and piles of interwoven fibers between the leaf midribs and found 1-6 individual tangkassi in each nest. Tangkasi nests are foundat an elevation of 462-574 m with a slope of 11% - 25%. Environmental conditions around the nest with light intensity 351.6 ± 39.71 lx, light percentage 19.9% ± 1.94%. The morning, afternoon and evening temperatures were 25.74ºC ± 0.42, 30.88 88C ± 0.47 and 25.79 C ± 0.35 with humidity in the morning, afternoon and evening 91.71% ± 2.54%, 77.48% ± 2.80% and 74.31% ± 19.4%. The vegetation of the nest habitat was dominated by Spathodea campanulata (INP 51.32%) for trees, Leucosyke capitellata (INP 27.99%) for poles and calamus sp. (INP 31.68%) for saplings. Keywords: Tangkasi, habitat characteristics, Tangkasi nest, Tahura Gunung Tumpa H.V Worang
JENIS DAN POPULASI SERANGGA-SERANGGA HAMA GUDANG BIJI PALA DI KECAMATAN TUMINTING KOTA MANADO Michael A. Lumi; Maxi Lengkong; Jantje Jantje Pelealu
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35390

Abstract

ABSTRACT The insects that destroy nutmeg seeds are known to be Araecerus sp., Carpophilus sp., Lasioderma sp., and Tribollium sp. Long-term storage and improper post-harvest handling will cause warehouse pests to attack which causes quality degradation and yield loss. The objectives of the study were (1) to determine the types of insect pests that attack nutmeg seeds in the warehouse and (2) to determine the population of insect pests that attack nutmeg seeds in the warehouse. This research was conducted in two ways, namely by direct capture method (hand sampling) and the use of yellow sticky trap traps. The direct capture method is carried out by taking samples of nutmeg seeds from five points, namely at the corner and center diagonally in the warehouse. The weight of the seed sample from each point was 500 grams, then put into a jar and covered with gauze. Sampling was carried out once a week five times. All samples were labeled and taken to the laboratory for calculation and species identification.Sampling using the Yellow sticky trap method is a trap made of yellow paper whose surface has been coated with adhesive glue. Yellow stick traps are hung in the nutmeg warehouse ± 2 meters from the warehouse floor surface, which are placed around piles of nutmeg sacks. The nutmeg warehouse where the observations were made was installed with four yellow sticky traps for three days. Observations were made at intervals of three days and repeated five times. Samples of trapped insects will be taken to the laboratory for population calculations and species identification. Based on the results of the discussion, it can be concluded that the insect pests that were found attacking nutmeg seeds in the storage warehouse in Manado City with the direct capture method (hand sampling) found six species, namely Anthribidae, Laemophloeidae, Silvanidae, Ptinidae, Tenebrionidae, Nitidulidae and those obtained by trapping (yellow sticky trap) six species were found, namely Anthribidae, Silvanidae, Laemophloeidae, Tenebrionidae, Tephritidae, Hymenoptera. The highest population is Tenebrionidae with a population of 66.6 individuals obtained by direct capture method (hand sampling); and 195.5 tails obtained by trapping (yellow sticky trap) Keyword : Insect, Pest, Warehouse, Nutmeg
UJI UNJUK KERJA ALAT IRIGASI SPRINKLER TIPE GUN RAIN DN-50 DI DESA TONTALETE KECAMATAN KEMA KABUPATEN MINAHASA UTARA Meike C. Kusaly; Ruland A. Rantung; Dedie Tooy
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35391

Abstract

Abstract This study aims to test the performance of irrigation sprinkler type gun rain DN-50, and how to manage water efficiently and effectively through the use of pressurized irrigation technology on plantation land located in Tontalete Village. This study uses tools such as sprinklers and water pumps on soybean plantations in Tontalete Village with an area of 60m x 60m. The results of this study indicate of watering using irrigation sprinkler the type Gun Rain DN-50 at the Village Tontalete for 19 minutes with 3 rounds of sprinkler produces 3.254 l and wet land 1808.64 m2, uniformity coefficient values indicating that the level of use watering sprinkler less efficient, the low rotational value of the pump (rpm) that is not in accordance with the specifications, and the sprinkler transmission distance which only reaches 24 m. Keywords: performance test,tools of irrigation, sprinkler, water supply, coefficient uniformity.
ANALISIS PERILAKU HARIAN HARIMAU SUMATERA (Panthera tigris sumatrae) DI TAMAN MARGASATWA MEDAN Kiandreas Tarigan; Wawan Nurmawan; Martina A. Langi
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35422

Abstract

AbstractMedan Wildlife Park is a conservation area for the Sumatran tiger (Panthera tigrissumatrae) which is kept in an artificial environment and shown to the public. Differentenvironments will affect the daily behavior of animals, and an indicator of successfulconservation is seen from the increase in the number of tigers that survive and are ableto breed (Yelanda, 2017). This research aims to study the daily behavior of thesumatran tiger (Panthera tigris sumatrae) at the Medan Wildlife Park by calculating2the duration and frequency of occurrence of each behavior sumatran tigers (Pantheratigris sumatrae) in the Medan Wildlife Park. The results of this study indicate that thereare five behaviors of the sumatran tiger (Panthera tigris sumatrae) in the MedanWildlife Park, with the percentage of duration and frequency of behavior from thehighest to the lowest is resting behavior (49.23%) with a relative frequency of 41.48%,moving places ( 41.02%) with a relative frequency of 37.47%, others (4.94%) with arelative frequency (12.71%), social (2.60%) with a relative frequency of 4.39%, andeating ( 2.20%) with a relative frequency of 3.95%. The daily behavior of the Sumatrantiger has differences in terms of length of time, manner, and behavior in the MedanWildlife Park with behavior in the wild. Based on the different tests conducted, it isknown that male and female sumatran tigers (Panthera tigris sumatrae) have differentforms of behavior but do not have a significant difference in behavior duration.Keywords: daily behavior, sumatran tiger (Panthera tigris sumatrae), medan wildlifepark
UJI KINERJA MESIN PENGOLAH GULA SEMUT HORJA MPN20 DI KELOMPOK TANI KARYA TANI DESA TALAITAD KECAMATAN SULUUN TARERAN KABUPATEN MINAHASA SELATAN Stenli F. E. Pomantow; Lady C. Ch. E. Lengkey; Robert Molenaar
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35468

Abstract

Abstract The purpose of this study is to evaluate the performance of palm sugar processing machine HORJA MPN20 including temperature conditions, product yield, energy consumption and energy efficiency of palm sugar processing machine HORJA MPN20 located in the farmer group Karya Tani. The results showed that the average fire temperature in the first to third experiments was 205.30ËšC, 214.4ËšC, and 240.4ËšC, respectively. The yields in the first to third experiments were respectively 9.47%, 10.40%, 11.03% with an average of 10.30%. Gas energy consumption in the first to third experiments were 136,533,62 kJ, 136,533,62 kJ, 141,241.68 kJ with an average of 138,102,98 kJ. The consumption of electrical energy in the first to third experiments were 711.48 kJ, 323.40 kJ, 662.97 kJ with an average of 565.95 kJ. Human energy consumption in the first to third experiments were 502.08 kJ, 313.8 kJ, 376.56 kJ with an average of 397.48 kJ. The energy efficiency of the engine in the first to third experiments was respectively 44.56%, 44.29%, 42.39% with an average of 43.75%. Key words: palm sugar, processing machine , performance, efficiency
KEANEKARAGAMAN KUPU-KUPU, TUMBUHAN PAKAN LARVA DAN IMAGO DI HUTAN LINDUNG GUNUNG TAMPUSU DAN MAHAWU Mufti Aldya Rivai; Hard N. Pollo; Jackson F. Watung
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35469

Abstract

Abstract Butterflies are a group of insects belonging to the order Lepidoptera, which have two pairs of wings and a scaly body. Butterfly species richness may decrease due to increased deforestation and conversion of forest land which affect the diversity of larval and imago feed plants. The purpose of this research was to analyze the diversity of butterfly species and feed plants for larvae and imago in the protected forests of Mount Tampusu and Mahawu. The method used in this research is the pathway count method. The results showed that there were 5 families of 37 species of butterflies in the two research locations including 26 species in the Mount Tampusu protected forest and 23 species in the Mount Mahawu protected forest. The results of the analysis of the Shannon-Wiener diversity index are H'= 2.74 and the evenness index analysis is: E = 2.74/ln (37) = 0.76. The larval food plants found in the Mount Tampusu Protection Forest were Ficus sp. and feed for larvae found in the Mount Mahawu Protection 2 Forest, namely Glochidion sp., and Alpinia sp.. The imago feed plants in the Mount Tampusu Protection Forest were Crassocephalum crepidioides, Lantana camara, Lindernia crustacean, Mikania cordata and forage plants in the Mount Protection Forest, namely Bidens pilosa, Crassocephalum crepidioides, Hyptis capitate, Impatiens sp., Sida acuta, and Vernonia sp.. Keywords: Butterflies, host plant and food plant, Mount Tampusu and Mahawu protected forests
UJI KINERJA ALAT IRIGASI SPRINKLER TIPE BIG GUN 1,25 INCI DI DESA TONTALETE KECAMATAN KEMA KABUPATEN MINAHASA UTARA Novianti Nari; Ruland A. Rantung; Dedie Tooy
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35470

Abstract

Abstract Sprinkler irrigation is the provision of water to crops by spraying water into the air, so that the plants get water from above like rain. The principle used by this system is to put pressure on the water in the pipe and emit it into the air so that it resembles rain and then falls on the ground. The purpose of this study is to test the performance and calculate ef iciency and uniformity of water supply by using irrigation sprinkler of the type big gun 1.25 inch. The method used is an experimental method and a descriptive analysis method, which focuses on performance testing using a irrigation unit sprinkler of type Big Gun 1.25 inch. This study uses several components of equipment such as a spinkler, water pump and hose on the plantation land of Tontalete Village with an area of 40 m x 40 m. The variables observed in this study include: water discharge, pump rotation (rpm), uniformity coef icient (CU), jet distance, and pump fuel use. The results of this study indicate that the provision of irrigation water sprinkler using a sprinkler Big Gun 1.25 inch and MGP pump 50 HD, with a round of sprinkler 3 times round the that produces a time for 12 minutes, the sprinkler can remove as much water as 77.46 l / min and irrigate the land area of 1,017 m2 with an average speed of rotation pump 2,008 rpm and spent as much as 280 ml of pump fuel/12 minutes. The farthest distance thewater sprinkler emits is 18 m. Keywords: performance test, irrigation, sprinkler, radiance, water discharge

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