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All Journal AGRIVITA, Journal of Agricultural Science Jurnal Penelitian Pendidikan IPA (JPPIPA) Agrin : Jurnal Penelitian Pertanian Menara Ilmu Agriprimatech Community Development Journal: Jurnal Pengabdian Masyarakat Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Jurnal Ekuilnomi Innovative: Journal Of Social Science Research Jurnal Media Ilmu Jurnal Medika: Medika Jurnal Pengabdian Masyarakat SAPANGAMBEI MANOKTOK HITEI
Sitinjak, Wahyunita
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Journal : Jurnal Penelitian Pendidikan IPA (JPPIPA)

 1 
Response of Growth and Production of Sweet Potato (Ipomea Batatas L.) Due to The Application of TSP Fertilizer and Cow Manure Sitinjak, Wahyunita
Jurnal Penelitian Pendidikan IPA Vol 11 No 6 (2025): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i6.11875

Abstract

The purpose of this study was to determine the response of growth and production of sweet potatoes (Ipomea batatas L.) due to the application of TSP fertilizer and cow manure, carried out in Huta I Silau Bayu, Gunung Maligas District, Simalungun Regency, North Sumatra, from May to August 2024. The study used a factorial Randomized Block Design (RAK), with 2 factors. The first factor is TSP fertilizer with 4 levels, namely P1 = 20.4g / plot, P2 = 40.8g / plot, P3 = 61.2g / plot, P4 = 81.6g / plot. The second factor is Cow Manure with 4 levels, namely: S0 = No Treatment, S1 = 5.1kg / plot, S2 = 10.2kg / plot, S3 = 15.3kg / plot. Observed parameters were Tendrils Length (cm) at 3 and 5 MST, Number of Bulbs Per Plant (fruit), Number of Bulbs Per Plot (bulbs), Bulb Weight Per Plant (g) and Bulb Weight Per Plot (kg). The results showed that TSP fertilizer application significantly affected Tendrils Length (cm) at 3 and 5 MST, Number of Bulbs Per Plant (bulbs), Number of Bulbs Per Plot (bulbs), Bulb Weight Per Plant (g) and Bulb Weight Per Plot (kg). The best dose of TSP fertilizer was found in the treatment of 30 tons/ha: 15.3 kg/plot. Cow Manure treatment significantly affected Tendrils Length (cm) at 3 and 5 MST, Number of Bulbs Per Plant (bulbs), Number of Bulbs Per Plot (bulbs), Bulb Weight Per Plant (g) and Bulb Weight Per Plot (kg). The best dose of cow manure was found in the treatment of 160 kg/ha: 81.6 g/plot. The interaction treatment of TSP fertilizer and Cow Manure fertilizer significantly affected the Length of Tendrils (cm) at the age of 3 and 5 MST, Number of Bulbs Per Plant (bulbs), Number of Bulbs Per Plot (bulbs), and Bulb Weight Per Plot (kg). It had no significant effect on Bulb Weight Per Plant (g). The best interaction treatment was in the TSP treatment (30 tons/ha: 15.3 kg/plot) with cow manure (160 kg/ha: 81.6 g/plot).  
Factors That Influence Orange Farmers Using Mixed Cropping Pattern in Nagori Bandar Purba, Purba District, Simalungun Regency Sitinjak, Wahyunita
Jurnal Penelitian Pendidikan IPA Vol 11 No 7 (2025): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i7.5381

Abstract

The problems studied in this study are (1) How much additional income does orange farmers get by using intercropping planting patterns in the research area? (2) What are the business risks that occur in orange intercropping farming in Pura Subdistrict, Simalungun Regency? This study aims to determine what factors make farmers use orange intercropping planting patterns in Bandar Pura Village, Pura Subdistrict, Simalungun Regency. The data used are primary data obtained from intercropping orange farmers with a sample of 30 respondents, secondary data obtained from relevant agencies. The results of the study show that orange production of 15,882 kg received an income of Rp. 190,059,200 with a production cost of Rp. 83,170,162 with an income of Rp. 106,349,683, the feasibility of orange farming with intercropping planting patterns can be calculated by R/C analysis. Based on the research results, the R/C value was 2.23, meaning that each R/C result was 2.0 > 1, indicating that orange farming in Bandar Purba Village, Purba District, Simalungun Regency was profitable and worth developing.
Analysis the Use of Gempur 480 SL Chemicals on the Mortality of Weed Types Sidabukke, Simon; Rozalina, Rozalina; Sitinjak, Wahyunita; Sinaga, Jonni
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.4855

Abstract

This study aims to determine the types of weeds that can be controlled or destroyed using the chemical Gempur 480 SL at PT. Toba Pulp Lestari Estate Tele. The method used in this research is a field survey method at 3 different masl by means of purposive sampling. Based on the research that has been done, it shows that the treatment of weed types found in Estate Tele is dominated by sedge weeds such as Cyperus rotundus and broad leaf weeds such as Boreria latifolia, Climedia hirta and Melastoma malabathtricum, while narrow leaf weeds such as Petridium (elephant fern), Stenochlaena (Vegetable ferns), Dicranopteris linearis (Wire ferns) are relatively few compared to sedge weeds and broadleaf weeds. The use of the concentration of the hebicide Gempur 480 SL of 1.25% can suppress weed growth where the percentage of dead weeds is higher. Weeding rounds have a significant effect on the percentage of weeds that die and the percentage of weeds that don't die. The highest percentage of weeds that died was in Weeding Round 3 (WR3). The interaction of herbicide concentrations and weeding rounds had a significant effect on the percentage of live weeds and the percentage of weeds that were not alive. The increase in the percentage of dead weeds will increase with the increasing concentration of the herbicide Gempur 480 SL, especially if the increased concentration of the herbicide Gempur is combined with Weeding Round 2 (WR2).
Increased Growth and Production of Shallots (Allium ascalonicum L.) with Mulching Type treatment and Tuber Weight Purba, Tioner; Sihaloho, Arvita; Situmeang, Ringkop; Sitinjak, Wahyunita; Sinaga, Asmina Herawaty
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.5815

Abstract

This study aims to determine the effect of mulch type and bulb weight on the growth and yield of onion production (Allium ascalonicum L.). In detail, this study aims to (1). Know the type of mulch that is most suitable for the growth and production of onion plants. (2). Knowing the weight of bulbs is best for the growth and production of onion plants. (3). Know the interaction between the type of mulch and the weight of bulbs used for the growth and production of onion plants. This study used Group Randomized Design (RAK) with 2 treatments, namely Factor I: three types of Mulch use (M): M0 = No Mulch; M1= Silver black plastic mulch (0.35 cm thick); M2= Mulch rice straw (1.5 cm thick). Factor II: three tuber weight intervals, namely: B0= 0 - 1.4 g (Small Tuber); B1= 1.5 – 1.8 g (Medium Tuber); B2 = > 1.8 g (Large Tubers). The results showed that the treatment of several types of mulch had a significant effect on plant height, weight of fresh tubers per clump, number of fresh tubers per clump, weight of fresh tubers per plot and number of fresh tubers per plot. M1 silver black plastic mulch treatment resulted in the highest plant height. weight of fresh tubers per clump (148.22 g), number of fresh tubers per clump, weight of fresh tubers per plot. Tuber weight treatment has a noticeable effect on plant height, number of leaves, weight of fresh tubers per clump, number of fresh tubers per clump, weight of fresh tubers per plot and number of fresh tubers per plot. B2 treatment yields the highest crop, number of leaves), weight of fresh tubers per clump, number of fresh tubers per clump, weight of fresh tubers per plot. The interaction of the use of several types of mulch and various tuber weights has a noticeable effect on plant height, number of leaves, weight of fresh tubers per clump, number of fresh tubers per clump, weight of fresh tubers per plot and number of fresh tubers per plot.
Analysis of the Partnership Between Turnip Farmers and PT VAI Company in Purba District Sinaga, Roeskani; Sitinjak, Wahyunita; Purba, Jhon Kariando
Jurnal Penelitian Pendidikan IPA Vol 11 No 9 (2025): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i9.12738

Abstract

This study aims to analyze the form of partnership implementation between turnip farmers and PT VAI, examine the benefits of this form of partnership for turnip farmers, and analyze turnip farming income. This study was conducted in Purba District, Simalungun Regency. Farmers in Nagori Pamatang Purba were designated as sample villages from the population that became research respondents. The sampling technique and population in this study used Purposive Sampling and Snowball techniques. The data analysis method used descriptive analysis of PT VAI's contract with partner farmers, farm income analysis, and R/C Ratio. The results of the study indicate that the form of partnership between PT VAI and turnip farmers in Purba District is a subcontract form. Where farmers and PT VAI have a contract regarding seeds, production prices and product quality. The benefits that are definitely obtained by farmers as partners include being able to help in procuring seeds. Farmers get convenience for seeds because they do not have to do their own seeding, thereby reducing the risk of failure because the seeds are ready to plant. The benefits of marketing guarantees provide a guarantee that the resulting product will be immediately sellable. One hundred percent of turnip farmer respondents answered that they received benefits in marketing convenience. This aligns with the initial rationale and hope for joining, which is that farmers won't have to search for markets to sell their products. Marketing guarantees can also motivate farmers to produce according to PT VAI's criteria so their products are accepted. Radish farming in Pematang Purba Village generates substantial income and is considered viable, as the R/C ratio analysis shows a value of 3.01, meaning that for every Rp 1.00 spent, a return of Rp 3.01 is generated.
Co-Authors Ahmad Fakhri Hutauruk Ambarita, Lenny Mutiara Arvita Netti Sihaloho, Arvita Netti Azis Trilinardi Damanik, Anggi Safitri Br Damanik, Hana Pertiwi Damanik1, Pandapotan Dimas Syahputra Galingging, Irawaty Rosalyne Girsang, Cristin Imelda Gultom , Sariaman GULTOM, SARIAMAN Hermes, Christian Daniel Hotman Tuah Imman Yusuf Sitinjak Januari Rizky January Rizky Linda Reni Manurung, Hotlan P Marbun, Jhonson Marlan Marulam MT Simarmata Nainggolan, Eva T Nainggolan, Rosita Nainggolan, Thomas Firdaus PURBA, IKA ROSENTA Purba, Jhon Kariando Purba, Linda Reni Purba, Nur Ainun Purba, Rosmadelina Purba, Van Lodewijk Reni, Linda Rosenta, Ika Rozalina, Rozalina Rozalina Saragih, Ramainim Sari, Juliantika Siadari, Martua Sidabukke, Simon Sihaloho, Arvita Sihaloho, Arvita Netti Br Sihotang, Indah Rosari Simanjuntak, Romauli Simbolon, Netty Mewahaty Sinaga, Asmina Herawaty Sinaga, Jonni Sinaga, Nisa Dearni Sinaga, Risdon Sinaga, Roeskani Siregar, Mirna Anriani Sitinjak , Imman Yusuf Sitinjak, Humala Situmeang, Ringkop Tanjung, Juwita Asyia Tioner Purba Zega, Yohannes Setiawan