Yohanes Parlindungan Situmeang
@warmadewa.ac.id
Agriculture Faculty
Warmadewa University
RESEARCH INTERESTS
Soil Science, Soil Fertility, Biochar
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
I. Gusti Bagus Udayana, Anak Agung Ngurah Mayun Wirajaya, Made Sri Yuliartini, Luh Kartini, Ida Bagus Komang Mahardika, Anak Agung Made Semariyani, I. Gede Pasek Mangku, Yohanes Parlindungan Situmeang, and Yuli Wibowo
AIP Publishing
I Nengah Muliarta, I Dewa Nyoman Sudita, and Yohanes Parlindungan Situmeang
Universitas Airlangga
Introduction: Bali, as an international tourist destination, is still experiencing problems in waste management. Suwung Landfill, Denpasar, is one of the landfills for waste originating from the Denpasar, Badung, Gianyar, and Tabanan (Sarbagita) areas. Methods: This research was an experimental study, by watering eco-enzymes on garbage heaps and examining changes in leachate parameters. Watering was carried out daily at a dose of 1 L of eco-enzyme dissolved in 1000 L of water and used for watering a garbage pile of 1 ha. The area of piles of garbage watered with eco-enzymes reaches 5 ha. Measured leachate parameters include pH, BOD, COD, TSS, N, cadmium, and mercury. Results and Discussion: Eco-enzymes have the potential to become activators or decomposers in waste composting. The evidence is that eco-enzyme watering causes the average leachate temperature to range from 36.63 to 40.370C, where the increase in leachate temperature occurs due to the rise in the temperature of the garbage pile. An increase in temperature characterizes the activity of microbes increases, so the decomposition process becomes rapid. Conclusion: Eco-enzyme spraying leads to a characteristic change in the form of an increase in the value of leachate parameters. The increase in temperature value, pH, BOD, COD, and N content of leachate indicates that environmentally friendly enzymes accelerate the decomposition of organic matter. The rapid decomposition process causes the total suspended density of leachate to increase.
I M A Widnyana, I B K Mahardika, M Suarta, L Kartini, M S Yuliartini, and Y P Situmeang
IOP Publishing
M S Yuliartini, A A N M Wirajaya, A U R Z Assegaf, and Y P Situmeang
IOP Publishing
K Maulana, M S Yuliartini, A A N M Wirajaya, I B K Mahardika, and Y P Situmeang
IOP Publishing
I M Mesa, Y P Situmeang, A A N M Wirajaya, I G B Udayana, and M S Yuliartini
IOP Publishing
Yohanes Parlindungan Situmeang, I Dewa Nyoman Sudita, and Made Suarta
Insight Society
I Dewa Nyoman Sudita, Yohanes Parlindungan Situmeang, and Made Suarta
Insight Society
I G B Udayana, L Kartini, Y P Situmeang, and I K Sunadra
IOP Publishing
I G L A A A Putra, Y P Situmeang, M S Yuliartini, and I G B Udayana
IOP Publishing
H D D R Amaral, Y P Situmeang, and M Suarta
IOP Publishing
N M D Janurianti, I W Sudiarta, and Y P Situmeang
IOP Publishing
G Y Arygunartha and Y P Situmeang
IOP Publishing
This study aims to improve student learning outcomes and scientific performance of physics. This research is a classroom action research. Subject from this study were students in the semester an odd number of school year 2018/2019 as many as 19 male students. This research implemented in two cycles with each cycle stage consisting of planning, action, observation/evaluation, and reflection. The results of this study indicate that 1) there is an increase in students' scientific performance. In the first cycle, the average value of performance the scientific achievement of students is 77.37 with a fairly high category, while at the second cycle increased to 87.90 with a very high category, 2) an increase student physics learning outcomes. In the first cycle, the average value of physics learning outcomes is achieved students are 73.00 while in cycle II it increases to 77.50. Research This class action is categorized as successful because it has reached the level of completeness Hornax of 94.7%.
Ni Made Yudiastari, Ni Ketut Etty Suwitari, Luh Suariani, and Yohanes Parlindungan Situmeang
IOP Publishing
The current condition of agricultural land in Indonesia, both wetlands and highlands, have low organic matter. The role of biochar to increase crop productivity is influenced by the amount of biochar added. Sorghum is a plant that can be used from stems, leaves, and fruit as animal feed. The purpose of this study was to evaluate the productivity and nutritional content of sorghum given biochar with different doses. This research is a one-factor experiment with the simple randomized block design. The treatments tested were biochar doses with 6 dose levels, namely: P0 (without biochar), P1 (3 ton ha-1), P2 (6 ton ha-1), P3 (9 ton ha-1), P4 (12 ton ha-1) and P5 (15 ton ha-1). Plant variables observed were the number of leaves and plant height, fresh forage production, dry matter production, and seed production per hectare, as well as the nutritional quality of sorghum such as crude protein, crude fiber, ash content, and dry matter content. The results showed that there was no significant effect on the variable number of leaves and plant height, crude protein, crude fiber, ash content, and forage, but significantly affected the variables of fresh forage production, dry matter production and grain yield per hectare. From this study, it can be concluded that the application of biochar dosage 9 ton ha-1 provides the best results for the production of fresh forage, dry material production and seed production per hectare.
Yohanes Parlindungan Situmeang, Ida Bagus Komang Mahardika, and Anak Agung Sagung Putri Risa Andriani
IOP Publishing
This study aims to examine the effectiveness of biochar from bamboo and coconut shell combined with compost and NPK fertilizer on the growth and yield of sweet corn. In this study, we used a randomized block design with factorial patterns consisting of two factors and 3 replications. The first factor is the treatment of biochar types (3 types), namely: without biochar, bamboo biochar, and coconut shell biochar. The second factor is the treatment of fertilizer types (4 types), namely: without fertilizer, compost, NPK, and compost+NPK. The results showed that the interaction of bamboo biochar with compost+NPK significantly increased the total fresh weight of the highest plant 297.97 g when compared to without biochar, compost, and NPK 184.63 g or increased by 61.38% with an agronomic effectiveness of 132.10%. Likewise, the coconut shell biochar interaction with compost+NPK significantly increased the highest total fresh weight of 295.83 g when compared to the lowest yield without biochar, compost and NPK 184.63 g with an increase of 60.23% and agronomic effectiveness of 103.76 %. The application of compost+NPK fertilizer treatment significantly gives the highest fresh weight of cob without husk 79.26 g increased by 51.54% when compared with the lowest yield on 52.30 g fertilizer without fertilizer. From the results of this study, biochar from bamboo and biochar from coconut shell combined with compost+NPK can be used to improve the yield of sweet corn.
Yohanes Parlindungan Situmeang, I Dewa Nyoman Sudita, and Made Suarta
Insight Society
This study aimed to determine the characteristics of biochar, compost, and poschar from livestock manure waste and its effect on the yield of red chili plants. Randomized Block Design (RBD) with nested patterns was used in this study. The treatment composition consisted of 9 types of fertilizer (cow compost, goat compost, chicken compost, beef biochar, goat biochar, chicken biochar, beef poschar, goat poschar, and chicken poschar), and 3 levels of fertilizer doses (5, 10, and 15-ton ha -1 ) and one control treatment. The results showed that the type of fertilizer treatment did not significantly influence all observed variables, except the maximum plant height and fresh weight of shoot had a very significant effect. While the dose of fertilizer did not have a significant effect on most of the variables observed except for the height of the chili plant, the weight of the fresh stem and leaves, and the weight of the fresh chili harvested. In various types of fertilizer treatments, the maximum plant height obtained in chicken biochar (111.53 cm), which shows a slight difference when it was compared with the lowest plant height of 99.58 cm in biochar goat. The treatment of compost, biochar, and poschar sourced from 15 tons ha -1 chicken manure achieved the highest yields of fresh weight of chili harvested respectively 266.06 g, 270.95 g, and 280.05 g which were significantly increased 39.16%, 41.72%, and 46.48% compared with control (without treatments).
Y P Situmeang, M Suarta, I K Irianto, and A A S P R Andriani
IOP Publishing
This study aims to obtain a proper dose of biochar for the growth and yield of red amaranth plants. This study used a complete randomized design of one factor with 4 replications. The tested treatment was bamboo biochar with 4 dose levels (0, 3, 6, 9, and 12 t ha−1). The results showed that biochar treatment gave significant effect to fresh weight of economic yield and oven dry weight of economic yield, but not significant to a variable of plant height and number of the leaf. Biochar as a soil enhancer has been able to improve soil physical properties, increase microbial activity, and improve soil fertility. With soil fertility improvements, it will enhance the ability of plants to absorb nutrients and water in the soil, and encourage the vegetative growth of plants and sunlight interception by leaves to produce photosynthesis. The highest fresh weight of amaranth yields was obtained at biochar 9 t ha−1 of 14.53 g which increased by 34.41% when compared with the fresh weight value of the lowest economic yield on biochar without 10.81 g.
A A S P R Andriani, Y P Situmeang, N P A Sulistiawati, and G I Setiawan
IOP Publishing
Yohanes P Situmeang
EDP Sciences
This study aims to determine the status of soil quality after biochar treatment, compost, and phonska in the cornfield. Soil samples were taken from 48 experimental plots after harvesting of maize. Assessment of soil quality is done by collecting selected indicator data including soil physical and chemical properties to observe changes in soil due to land use and agricultural cultivation practices. The soil quality status in this study was determined by calculating the value of soil quality rating (SQR) based on the weighting of 11 indicators of soil quality. The results showed that soil quality before the research was bad (SQR 30) and improved to moderate (SQR 27) until a good (SQR 20) after the research of biochar, compost and NPK phonska on the cornfield. Improved soil quality in biochar formulations 10.52 t ha-1, compost, and phonska, due to improved soil physical properties such as porosity, bulk density, and soil moisture content, which has encouraged the process of exchange and chemical reactions in the soil to release nutrients for the plant. Giving of bamboo biochar, compost, and NPK phonska on dry land cultivated maize has resulted in good soil quality (SQR 20) or approaching sustainability status is very good (highly sustainable).
Yohanes Parlindungan Situmeang, I Made Adnyana, I Nengah Netera Subadiyasa, and I Nyoman Merit
Insight Society
Biochar is a carbon-rich material produced from incomplete combustion of agricultural biomass through pyrolysis process. Bamboo biochar can increase soil carbon content, improve soil fertility and restore the degraded soil. Previously we found that bamboo-biochar was effective to improve maize yield with an optimum dosage 10.52 t ha -1 biochar. Here, we examined the effectiveness of bamboo-biochar combined with compost and NPK fertilizer to improved soil quality and crop yield. In this experiment, we used a randomized block design (RBD) with two factors, three replications. The first factor was biochar dosage (four levels), namely without biochar, biochar dosage 5.26 t ha -1 , biochar dosage 10.52 t ha -1 , biochar dosage 15.78 t ha -1 . The second factor is the type of fertilizer with four types, namely: without fertilizer, compost, NPK, and compost+NPK. The results showed that biochar dosage 10.52 t ha -1 combined with compost+NPK could increase P and K availability, increase total soil microbes, and improved soil quality to be very good with soil quality rating value 18. The biochar dosage 10.52 t ha -1 combined with compost+NPK gave the dry weight seed-corn highest of 12.84 tons per hectare that increased 38.61% when compared with without biochar and with compost+NPK. The highest yield 12.84 tons of the dry weight of seed-corn per hectare provides the highest effectiveness-agronomic value 119.69% and feasibility of corn crop farming in drylands value 1.27.
Yohanes Parlindungan Situmeang, I Made Adnyana, I Nengah Netera Subadiyasa, and I Nyoman Merit
Insight Society
The purpose of this study was to determine the effect of treatment of various doses of biochar level bamboo, compost, and phonska on hybrid corn plant growth bisi-2 super in dry land. The design used in this study is a randomized block design (RAK) with a pattern of nested experiments. Factors treatment consists of 3 types of materials to improve soil quality, that biochar bamboo, organic compost fertilizer and inorganic fertilizer dose phonska with 4 levels and a control for comparison. The results showed that the treatment of the type of fertilizer had no significant effect on all the variables observed. While the dosage of biochar bamboo gives highly significant effect on plant height, number of leaves and total leaf area per plant. The highest result of variable plant height, number of leaves and total leaf area per plant corn obtained at treatment dose of 5-10 tons/ha biochar bamboo, 10-20 tons/ha of compost and 300 kg/ha phonska. From the results of the regression analysis obtained optimum doses of biochar bamboo 10.93 tonnes/ha with maximum plant height of 244.11 cm, the optimum dose of compost 19.54 tonnes/ha with maximum plant height of 247.89 cm, and the optimum dose phonska 308.11 kg/ha with a plant height of 246.32 cm.
I Gusti Made Arjana, Yohanes Parlindungan Situmeang, I Nengah Suaria, and Ni Komang Sulasmini Mudra
Insight Society
The purpose of this study was to determine the effect between types of cuttings and between varieties of plant material on any type of plant material chrysanthemum cuttings. Methods trial with a randomized block design factorial nested pattern. The results showed that the treatment effect of plant cuttings type of material does not give a significant effect on all parameters observed. Influence of cuttings between varieties at any plant material gives a significant influence on the parameters, the maximum number of leaves, flower stalks weight and economical weight of fresh flowers. The average weight of the highest economical due to the influence between the varieties in each type of plant material cuttings from mother plants found in fiji white varieties 93.83 g and not significant with 93.46 g fiji yellow varieties. So also in effect between varieties on any type of cuttings from the plant material production plant gives the same result.
I Gusti Made Arjana, Yohanes Parlindungan Situmeang, and I Nengah Suaria
Insight Society
The purpose of this study was to determine the potential of agro-climate, technology of cultivation, harvest and post-harvest chrysanthemums. This study uses survey method, through the collection of primary data and secondary data. This research is located in the village of Pancasari, District Sukasada, Buleleng Bali Province. Descriptive survey conducted on 40 respondents chrysanthemum growers using the component identification of determinants of commodity production chrysanthemum include: site selection, infrastructure, crop production processes and post-harvest handling. The survey results showed that 100% of the farmers have chosen a suitable location with agro-climatic conditions required by the chrysanthemum plant, and 86.09% of the farmers have been using the means needed to support the process of crop production. In the process of production of 78% in accordance with the operational procedures. At the stage of harvest and post-harvest handling 80% have been implemented by farmers and some still use conventional methods of handling. Thus Pancasari village has a potential location for the cultivation of chrysanthemum as a mainstay commodity.