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KONVERSI BATUBARA LIGNITE MENJADI ASAM HUMAT SEBAGAI PUPUK TANAMAN Fadhilah, Rahimatul; Nursanto, Edy
Journal TECHNO Vol 10, No 1 (2024)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Low-rank coals, such as lignite and sub-bituminous coal, generally exhibit low calorific values (< 5,100 kcal/g, air-dried basis) and high moisture content (30-50%). This high moisture makes them less attractive and difficult to market, despite their abundance in Indonesia. Additionally, these coals are prone to spontaneous combustion, requiring special handling. Given their high moisture and sulfur content, they are inefficient as fuel and contribute to gas pollution, necessitating costly emission controls. This study, conducted in collaboration with Universitas Pembangunan Nasional Veteran Yogyakarta, explores the use of fine coal as a fertilizer additive. The research aims to evaluate the effectiveness of fine coal in urea fertilizers and analyze its humic acid content. Fine coal was tested as an additive in urea fertilizers at ratios of 3:1, 1:1, and 1:3 on pakcoy, kangkung, and tomatoes. The 1:3 ratio of urea to fine coal proved most effective, enhancing plant growth and leaf quantity. Results suggest fine coal, a byproduct from PT Adaro Indonesia, can be effectively used as a fertilizer additive, contributing to waste reduction. However, humic acid analysis revealed it does not yet meet standard fertilizer quality requirements, indicating a need for further improvement. Keyword: Low-rank coals, Fine coal, Fertilizer additive, Humic acid, Plant growth

GROWTH RESPONSE AND YIELD OF PURPLE EGGPLANT ON VARIOUS PLANTING MEDIA AND LIQUID ORGANIC FERTILIZER Maryana, Maryana; S. Padmini, Oktavia; Indri, Nia
Journal TECHNO Vol 9, No 2 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Purple eggplant is a seasonal vegetable that contains a lot of fiber and few calories and is rich in manganese, folate, potassium, vitamins K and C, small amounts of niacin, magnesium and copper. The research aims to determine the composition of various planting media compositions and liquid organic fertilizers that are best for the growth and yield of purple eggplant plants. The research was carried out at the Experimental Garden of the Faculty of Agriculture, National Development University "Veteran" Yogyakarta. This research used a factorial design arranged in a completely randomized design. The first factor is the composition of the planting medium, soil, sand, and manure with volume ratios of (2:1:1), (1:1:2), (1:2:1), and (1:2:2). The second factor is the type of liquid organic fertilizer consisting of rabbit urine, cow urine, rice washing water and liquid smoke. The research results showed that the composition of the planting media and the application of liquid organic fertilizer from rabbit urine, cow urine, rice washing water and liquid smoke had no significant effect on all parameters, except for the diameter of purple eggplant stems per plant.

ANALYSIS OF WEED VEGETATION IN TEAK AND SENGON STANDS IN SUMBER GIRISUKO VILLAGE PANGGANG DISTRICT GUNUNGKIDUL REGENCY Maryana, Maryana; Rizal AZ, Abdul; Aji Pangestu, Febriana
Journal TECHNO Vol 10, No 1 (2024)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Weed vegetation refers to plants that grow in agricultural land, gardens, or other environments that are undesirable to humans. The aim of the research was to analyze weed composition and determine the value of weed diversity in teak plant stands and sengon plant stands. Analysis of weed vegetation on land with the SDR coefficient value of weed species, to see differences in weed composition between two stands using a community index. The research was carried out in Sumber Girisuko Village Panggang District, Gunungkidul Regency. Determining the research location used the purposive sampling method and weed sampling using systematic random sampling, while the analysis method used the quadratic method. The results obtained show that in this study 10 weed species were found from 6 families, namely Passifloraceae, Colchicaeae, Asteraceae, Poaceae, Convolvulaceae, and Verbenaceae. In the land under teak stands, 5 species were found with SDR values of 0.03-0.61, in land under sengon stands there were 8 species with SDR values of 0.02-0.48. The value of the community coefficient for the land under the teak and sengon stands was 16%, meaning that the weeds on the two lands were not uniform. The diversity index (H') value for land under teak stands is 1.10 and for sengon stands is 1.52, which means it is classified as moderate. The Simpson dominance index was found to be 0.40 in land under teak stands, and 0.27 in sengon stands, meaning that weed species were present but did not dominate.

Peningkatan Pertumbuhan dan Hasil Sawi Hijau (Brassica chinensis) oleh Bakteri Fotosintetik dalam Kondisi Lapangan Avianto, Yovi
Journal TECHNO Vol 9, No 2 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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In the 21st century, there has been a gradual shift in agricultural practices towards embracing organic concepts and harnessing the potential of beneficial bacteria to amplify crop production. Simultaneously, there is a heightened public awareness concerning the significance of integrating leafy vegetables into diets. A promising avenue to address these evolving concerns involves the adoption of photosynthetic bacteria as biofertilizers. This study sought to examine the extent to which pak choy plant yield is enhanced through the supplementation of photosynthetic bacteria (PSB). Furthermore, the investigation aimed to elucidate the underlying mechanisms by which photosynthetic bacteria contribute to the growth of mustard green plants and determine the optimal PSB dosage to achieve maximal production. Conducted between November and December 2022 at the Biotech Botanical Garden, the research employed a complete randomized block design incorporating various PSB treatment levels, including no PSB spray, a 10 mL/L dosage, a 50 mL/L dosage, and a 100 mL/L dosage. An array of growth indicators such as plant height, leaf count, leaf width, root length, fresh and dry shoot weight, fresh and dry root weight, relative water content, and consumption index, were meticulously observed. The study revealed noteworthy alterations in improved growth and yield (consumption index). The optimal PSB dosage, identified to maximize pak choy plant production, was determined to be 67.25 mL/L.

APLIKASI PUPUK ORGANIK CAIR KEONG MAS DAN PENAMBAHAN MEDIA TANAM TERHADAP PERTUMBUHAN DAN HASIL TERUNG Sanjaya, Lucky; Sri Lestari, Rina
Journal TECHNO Vol 10, No 1 (2024)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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The purpose of research was to examine the effect of gold snail liquid organic fertilizer and organic planting media on eggplant growth and yield. The research is a field experiment prepared with RAKL. The first factor in the gold snail liquid organic fertilizer is 40 ml/L, 80 ml/L, and 120 ml/L. The second factor is the addition of planting media namely 20 kg/plot sawdust, 20 kg/plot cocopeat, and 20 kg/plot husk charcoal. Data were analyzed using ANOVA 5% level and further tested using DMRT 5% level and orthogonal contrast test. The results showed that there was an interaction between the treatment of gold snail liquid organic fertilizer concentration and organic growing media. The best combination in the treatment of 120 ml/L gold snail liquid organic fertilizer concentration with 20 kg husk charcoal planting media/plot against the stem diameter parameter of 35 days after planting and the best combination in the treatment of 80 ml/L gold snail liquid organic fertilizer concentration with sawdust planting media 20 kg/plot against the fruit weight parameter per hectare. The addition of cocopeat planting media of 20 kg/plot shows a heavier fruit weight value per fruit compared to the addition of husk charcoal planting media 20 kg/plot.

Rancang Bangun Instalasi Aquaponik Sederhana Sistem Deep Flow Technique di Lahan Pekarangan Umami, Arif; Faris Mu'taz, Ade; Taufik Amin, Ja'far; Azhar Riza, Aulia
Journal TECHNO Vol 9, No 2 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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One aspect of success in aquaponic cultivation is a suitable installation to support the growth of plants and fish. Good nutritional water quality is needed in aquaponic cultivation for the survival of fish and plants. Aquaponic systems could use several systems to deliver nutrients or water to plants. One system that could be used is the DFT (Deep Flow Technique) system. The DFT system for simple aquaponics requires a design and its implementation in the yard. So, in this article, the design and implementation of a DFT system for simple aquaponics in the yard were discussed. The design results have been successfully realized. DFT aquaponic trials on rice-tilapia plants resulted in normal growth of plants and fish even though harvest data were not recorded. Subsequent trials on DFT aquaponic vegetable- catfish produced an average wet weight per plant for the Grand Rapids lettuce was 15,526 gr, Red Rapids was 60,916 gr, Green romaine was 48,630 gr, and star lettuce was 33,106gr. Meanwhile, the average yield obtained from the Tosakan variety was 31,466 gr per plant, Shinta was 38,576 gr, New White Light was 10,116 gr, and Chinese Kale New Veggin was 18,678 gr/plant. Catfish harvested were 100 - 200g per fish with SR value> 80%.

OPTIMASI PRODUKSI WEDANG UWUH SAAT PANDEMI COVID-19 (Studi Kasus di CV. Progress Jogja DIY) Meisafitri, Nesti; Suprihanti, Antik; Handri Utami, Heni
Journal TECHNO Vol 10, No 1 (2024)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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This study aims to analyze optimal combination of inputs, labor, machines and demand for wedang uwuh (original, brewed, and instant) which provides an optimal combination of wedang uwuh production in CV. Progress Jogja. This research uses descriptive method with case study method and the director and production manager as respondents. The types and sources of data are primary and secondary data. Collecting data uses observation, interviews, and documentation method. The data analysis technique uses a Linear Programming (LP). The results showed that there was an optimal combination of input used namely rock sugar, demand for wedang uwuh seduh, and demand for instant wedang uwuh. The combination input such as dry ginger, wet ginger, granulated sugar, nutmeg leaves, sappan wood, clove leaves, labor, machines (cabinet dryer, grinder, grate, spinner, crystallizer) and the demand of original wedang uwuh did not optimal yet

THE OPTIMIZATION OF DRYING IN THE PROCESS OF TAKING GLUCOMMANAN AS PORANG FLOUR (Amorphophallus Spp.) Sugiarto, Bambang; Proklamagita, Angela Merici Herdyana; Hasibuan, Juana Hizkia; Sulistyowati, RR Endang
Journal TECHNO Vol 9, No 2 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Porang (Amorphophallus Spp.) is one of the Indonesian commodities that are full of benefits because they contain glucomannan, but Porang also contains calcium oxalate, which is dangerous if consumed in large quantities so it requires pre-treatment such as immersion. Besides that, immersion also serves to maintain and improve the physical and chemical quality of Porang. In this research, the immersion media used were water, salt solution (NaCl), vinegar solution (CH3COOH) and ethanol. Porang that have gone through the immersion process are then removed from the water content using spinner and then dried using dehydrator. This research used drying temperature variations of 40°C, 45°C, 50°C, 55°C, and 60°C. The purpose of this research was to obtain the optimal drying temperature for the glucomannan content of Porang flour. Glucomannan content was determined using DNS method. The result showed that each immersion media had a different optimal temperature due to the difference in oxalate released.

Growth of Oil Palm Seedlings on Several Doses of Sugarcane Blotong and Soil Types Suryanti, Sri; Firmanto, Agung; Rahayu, Enny
Journal TECHNO Vol 9, No 2 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Blotong is sugar factory waste which can be used as organic fertilizer. Research on the effect of sugarcane doses for several types of soil was carried out with the aim of knowing the effect of blotong doses and soil types on the growth of oil palm seedlings in designpre-nursery. The research was conducted at the Stiper Agricultural Institute Research and Experimental Garden located in Maguwoharjo village, Depok District, Sleman Regency, DIY from March to June 2021. The experimental method used was a completely randomized design with two factors. The irst factor was the blotong dosage which consists of five levels, namely 0, 100, 200, 300 and 400 grams / polybag. The second factor was the type of soil which was divided into three levels, namely latosol, regosol and grumusol. The research data were analyzed using analysis of variance at a real level of 5% and if there were significant differences, it was continued with the Duncan Multiple Range Test. Observations were made on the parameters of seedling height, number of leaves, leaf area, fresh crown weight, shoot dry weight, root fresh weight, root dry weight, length of primary root, number of primary root, number of secondary root, number of tertiary root and root volume. The results showed that there was no significantly interaction between blotong and soil type on all observed parameters. The use of blotong at a dose of 300 g significantly increased seedling height and primary root length. The use of latosol soil as a seeding medium significantly increased seedling height and fresh shoot weight, while grumusol soil increased the number of secondary and tertiary roots.

EFEKTIVITAS ALAT PENGERING DEHIDRATOR TENAGA LISTRIK SEBAGAI ALTERNATIF PENGERINGAN HASIL PERTANIAN SEREH WANGI Sugiarto, Bambang; Mariska Aulia Putri, Indah; Nur Azizah, Isnaini; Wahyu Widayati, Tunjung
Journal TECHNO Vol 10, No 1 (2024)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Most drying processes in Indonesia still utilize heat from direct sunlight. However, this method is deemed less effective because it is very dependent on the intensity of sunlight (weather) and the time required tends to be long. A drying tool is needed as an alternative that can be used to save drying time. This research aims to determine the efficiency of electrically powered drying equipment using citronella as an agricultural product that is abundant and easy to find. The variables used in this research are material weight with variations of 10, 15, 20, 25, 30 grams and drying time with variations of 10, 15, 20, 25, 30 minutes. The test methods used were air content testing, drying rate testing, mass flow rate testing and drying equipment efficiency testing. The results of the tests that have been carried out, obtained optimal results for the citronella material, namely with a weight variation of 10 grams over a period of 5 hours with the lowest water content of 2%. The efficiency of the electric power dryer was obtained at 65.62%.

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Journal Mail Official
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Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA