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Geology And The Effect Of Boulder Size Concretion To Bauxite Laterite Deposit Quality At Djanra Area, Sandai District, Ketapang Regency, West Kalimantan Sutarto Sutarto; Agus Harjanto; Paschalis Pindyka Aji Kurniawan
Techno LPPM Vol 8, No 2 (2022)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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The research area is located in Djanra areas Sandai District, Ketapang Regency, West Kalimantan. The research methods used are surface geological mapping, bauxite sample collection, also studio and laboratory analysis. Laboratory analysis includes petrographic analysis, XRF, and wet analysis. The geomorphology of the study area is dominated by denudational and anthropogenic landforms as a result of mining activities. The constituent rocks are Kerabai andesite units which are Middle-Late Cretaceous and are intruded by Sukadana trachyte units which are of Late Cretaceous period. The geological structures found are a shear joint with the main southwest-northeast direction and the normal right slip fault. Bauxite laterite deposits in the research area have varying overburden and ore thicknesses. Distribution of concretion size of boulder to depth in the study area varies. Based on the results of the study, the boulder size concretion can affect the quality of bauxite laterite deposits. Where on DJANRA-1 hill is declared feasible to be taken and mixed with smaller concretions because it meets quality standards.

Growth And Yield Of Cassava Leaves To The Dose Of Manure And The Position Of Planting Stem Cuttings Maryana Maryana; Suwardi Suwardi
Techno LPPM Vol 8, No 2 (2022)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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The aim of the research was to determine the growth and yield of cassava leaf at the best dose of manure and planting position of cassava stem cuttings. The location of the research was carried out in the Garden of the Faculty of Agriculture UPN "Veteran" Yogyakarta, Condongcatur, Yogyakarta. The time of the research was carried out in November - February 2020 with the Regosol soil type and an altitude of approximately 110 m above sea level. This study used a field experiment with a factorial design which was arranged in complete randomized groups. The first treatment was the dose of manure, consisting of 4 levels: manure doses of 5 t/ha, 10 t/ha, 15 t/ha, and 20 t/ha. The second treatment was the planting position of the stem cuttings, consisting of 3 levels: vertical planting position, vertical planting position but the tip facing upwards was burned, and planting tilted at an angle of more than 60 degree. The results showed that the dose of manure did not show a significant difference to the growth and yield of cassava leaves. The planting position of cassava stem cuttings with normal cuttings gave the highest growth in the number of cuttings, shoot length, number of leaves, plant height and yield of fresh weight of cassava leaves. Interaction between manure dose and stem cuttings planting position

Design of Internet of Things (IoT) Based Hydroponic Controlling Device in Pyramid Greenhouse Arif Umami; Bagus Muhammad Akbar
Techno LPPM Vol 8, No 2 (2022)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Smart farming technology was previously implemented at Wedomartani experimental station, Faculty of Agriculture UPN "Veteran" Yogyakarta. It is proven to overcome human resource limitations in hydroponic cultivation. Even so, Smart farming has not been implemented yet in Pyramid Greenhouse, Which is the iconic landmark of the Faculty of Agriculture. Preparing IoT-based devices requires designs with certain specifications. Without an appropriate design, it would be found a failure system. This article’s purpose was to design an Internet of things (IoT) based hydroponic controlling device in Greenhouse Pyramid UPN “Veteran” Yogyakarta. It was built based on a literature study. Expert proofing was performed to ensure the design would work if implemented. The design contained the system overview, hardware description, user interface design, and integration of device system design in hydroponic installations. The design was positively accepted by users (Head of the experimental field and technicians). In the future, the proposed design needs to be realized as a part of greenhouse development.

ROLE OF TEA DREGS LIQUID ORGANIC FERTILIZER AND PLANT MEDIA COMPOSITION IN INCREASING TOMATO RESULTS (Lycopersicon esculentum Mill.) Maryana Maryana; Darban Haryanto; Reti Columba Lifia
Techno LPPM Vol 9, No 1 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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The aim of this study was to determine the composition of the tea waste liquid organic fertilizer and the composition of the growing media in increasing the yield of tomato plants. The research was conducted from June to November 2022 at the Wedomartani Experimental Garden, Faculty of Agriculture UPN "Veteran" Yogyakarta Kapanewon Ngemplak, Sleman Regency, Yogyakarta. Research method with polybags using factorial (3 Ã— 3 + 1) arranged in a completely randomized design. The first factor was tea waste liquid organic fertilizer with 3 levels: 200 ml/l, 300 ml/l, and 400 ml/l. The second factor was the composition of the planting medium in the form of a mixture of soil and goat manure consisting of 3 levels: (1:1), (1:2), and (2:1). For each treatment of tea waste liquid organic fertilizer, 3 grams of NPK 16:16:16 fertilizer was added. The control treatment used soil and 3 grams of NPK fertilizer for each application of fertilization which was given 3 times. The results showed that the combination of treatments was better than the control on tomato fruit diameter per harvest, tomato fresh fruit weight per third and fourth harvest. There was no interaction between the concentration of tea waste liquid organic fertilizer and the composition of the planting medium. Concentration of 400 ml/l tea waste liquid organic fertilizer gave higher yields on tomato fruit diameter per harvest, tomato fresh fruit weight per harvest and total tomato fresh fruit weight. The composition of the growing media with a composition of 1:1 gave the highest yield on tomato fruit diameter per harvest and a composition of 2:1 for total fresh fruit weight of tomatoes.

LAND SUITABILITY EVALUATION FOR SUGARCANE IN SEGOROMULYO VILLAGE, PAMOTAN SUBDISTRICT, REMBANG REGENCY Stefanus Feby Nugroho; Didi Saidi; Partoyo Partoyo
Techno LPPM Vol 9, No 1 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Sugarcane planting in Pamotan Subdistrict, Rembang Regency took place before 2000, but in recent years farmers have complained of declining yields. Data from the Central Statistics Agency for Rembang Regency shows that the productivity of sugarcane in Pamotan Subdistrict in 2011 produced 6,000 kg/ha, 2014 produced 4,597 kg/ha, and 2017 produced 4,200 kg/ha. This study aims to determine the characteristics of the land and land suitability class for sugar cane in Segoromulyo Village. The method used is the matching method, the determination of sample points is carried out using a purposive method based on the land system which is determined from the overlay of soil type maps, slope maps, and land use maps. The parameters measured include average temperature, water availability/rainfall, drainage, texture, coarse material, soil depth, soil CEC, base saturation, pH, C-organic, salinity, erosion hazard, slope, flood/puddle hazard, rock on the surface, and rock outcrops. The results showed that Segoromulyo Village has several land suitability classes for sugar cane, namely S2 with a limiting factor of water availability and oxygen availability of 198.08 ha or around 32.84%, S2 with a limiting factor of water availability, oxygen availability and salinity of 207 .77 ha or around 34.44%, and S3 with a salinity limiting factor of 197.41 ha or around 32.72%.

DIGGING TIME DECREASION ON THE BLASTING OF OVERBURDEN; EXPLOSION GEOMETRY OVERVIEW Nur Ali Amri; Michael Keenlie; Raden Hariyanto; Berryl Afkar Muhammadi
Techno LPPM Vol 9, No 1 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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This study aimed to evaluate the geometric design the P80 or Passing 80% of rock fragments and the digging time of equipment for sandstone overburden blasting with rock density, 2.43 kg/m3. As a basis for the results of observations on the current geometric design with a burden of 9 m, spacing of 9 m, and a depth of blast holes of 8 m, problems were found in the results of rock fragments that did not meet the criteria with the size of the rock fragments P80, 79.24 cm, the digging time of loading, 13.03 second and an average powder factor of 0.24 kg/m3. To obtain more uniform rock fragments is to improve the blasting geometry, so the energy distribution can be even that rock fragments and better digging time can be obtained in sandstone. The blasting geometry design which is proposed to improve fragmentation, 8 m; burden, 9 m; spacing; 3.5 m stemming; and 8 m blast hole depth with a column filled explosives of 4 m and the number of perforated explosives is 163.2 Kg, with powder factor, 0.28 kg/m3. The proposed blasting geometry produces suitable rock fragment. P80 is 39.93 cm and average digging time of 10.61 seconds.

RESOURCE ESTIMATION OF LATERITE NICKEL USING INVERSE DISTANCE WEIGHTING METHOD CASE STUDY OF NORTH KONAWE DISTRICT, SOUTHEAST SULAWESI PROVINCE Sofiannur Sofiannur; Eddy Winarno; Nur Ali Amri; Abdul Jalil
Techno LPPM Vol 9, No 1 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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The mining industry's estimation of mineral resources is a stage that is carried out to determine the quantity of a mineral. This study aimed to determine the selection of laterite nickel resource estimation methods. The determination of the estimation method is based on the value of the coefficient of variance and the geological conditions of the mineral deposits. This research area is in Lasolo Kepulauan District, North Konawe Regency at PTâ€”x block south. Statistical analysis found that the coefficient of variance in the limonite zone was 0.19, the saprolite area was 0.37, and it was included in moderate geological geometry conditions. The estimation method used in this research is the inverse distance weighting method. The estimation results in the limonite zone are 3,398 tons with an average Ni content of 0% Ni, 448,037 tons with a moderate Ni content of 1.32%, 588,256 tons with an average Ni content of 1.65%, and 14,912 tons with an average Ni content of 2.01%. In comparison, in the saprolite zone, there are 174.46 3 tons with a middle grade of Ni of 0.84%, 408,896 tons with an average quality of Ni of 1.26%, 788,818 tons with moderate content of Ni of 1.77%, 771,709 tons with a middle grade of Ni of 2.21%, 172,236 tons with an average quality of Ni of 2.63%, and 5,215 tons with an average rate of Ni of 3.04 %.

GROWTH and YIELD RESPONSE of TOMATO (Lycopersicum esculentum Mill.) on VERMICOMPOST FERTILIZATION and WATER SHOOTS PRUNING Nur Aulia Suwari; Tuti Setyaningrum; Heti Herastuti
Techno LPPM Vol 9, No 1 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Inorganic fertilizers used continuously in tomato cultivation cause soil degradation which will affect the growth and yield of tomato plants. Efforts to maintain soil fertility include applying organic fertilizers and reducing inorganic fertilizers, one of which is vermicompost. The aim of the study was to obtain the best treatment combination from the administration of various doses of vermicompost and the time of pruning water shoots. The research was conducted from July to October 2022 in Kalasan, Yogyakarta. The research method was a field experiment using a factorial Complete Randomized Block Design. Factor I was the dosage of vermicompost: 5 tons/ha, 10 tons/ha, 15 tons/ha, and 20 tons/ha. Factor II was the time of pruning water shoots: 20 days after planting (DAP), 35 DAP and 50 DAP. The results showed that vermicompost 20 tons/ha by pruning water shoots at 20 DAP gave the best results on the number and weight of fruit per plant. The treatment of vermicompost at 20 tons/ha gave the best results on plant height and stem diameter, as well as pruning water shoots at 20 DAP.

INVENTORY OF RED CHILI (CAPSICUM ANNUM L.) PLANT DISEASES IN PAKEM DISTRICT, SLEMAN REGENCY Ulilalbab, Azizah Ridha; Ajri, Miftahul; Poerwanto, Mofit Eko; Wicaksono, Danar
Journal TECHNO Vol 10, No 1 (2024)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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Red chili is cultivated practically everywhere and plays a crucial role in Indonesian culture, economy, and cuisine. Plant diseases have been the main factor driving the country’s yield reduction of red chili. This research was conducted to observe chili plant diseases in Hargobinangun Subdistrict, Pakem District, Sleman, Yogyakarta. Chili variety Twist-42 was planted in the area. The Twist-42 variety is a local variety that is well adapted in the middle plains between 450 – 650 masl (meters above sea level) and is a good variety in both the dry and rainy seasons. There were 360 red chili plants as samples. The diseases found are Yellow leaf curl disease, Anthracnose, Ralstonia wilt, and Root knot nematode (Meloidogyne spp.).

The Effect of Cultivation Techniques on Soil Characteristics and Bambara Groundnut Production Al Hamdi, Muhammad Fauzan Farid; Kusumawardani, Mawar; Astuti, Hanifah Dwi; Pruwita, Adika Trias
Journal TECHNO Vol 9, No 2 (2023)
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

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The potential of bambara groundnut (Vigna subterranea (L.) Verdcourt) as a source of protein is relatively high, but the production is relatively low. Efforts that can be made to increase production include modifying cultivation techniques. The aim of this research is to determine the effect of cultivation techniques on soil characteristics and bambara groundnut production, as well as to determine the correlation between production variables and soil characteristics. This research was conducted in Dukuh Tanjung, Umbulmartani Village, Sleman district. The design used was a Randomized Complete Block Design with one factor and three replications/blocks. The factors applied are 2 cultivation techniques: using beds and without using beds. The variables observed in this research include pod yield variables and soil character analysis. The bambara groundnut cultivation technique with beds produces a lighter density per mass than the cultivation technique without beds. The element P (phosphorus) content in the soil is an element that has a real positive correlation with all yield variables. The dust fraction is the soil fraction that is most significantly negatively correlated: negatively correlated with the number of pods per plant, dry pod weight per plot, N content and K content in the soil.

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Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA