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All Journal Jurnal Agroekoteknologi Terapan
Rumbiak, Julio Eiffelt Rossaffelt
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Agriculture, Biological Sciences & Forestry Environmental Science

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Response Of Liquid Organic Fertilizer Concentration Levels on The Growth and Yield of Three Varieties of Pakchoy (Brassica rapa L.) Seftiani, Rani; Laila, Alfu; Rumbiak, Julio Eiffelt Rossaffelt; Sulistyorini , Endang
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) Vol. 7 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v7i1.66113

Abstract

Pakchoy production in Indonesia has declined due to excessive use of inorganic fertilizers and suboptimal cultivation practices, necessitating the adoption of alternative fertilization methods, such as liquid organic fertilizer (LOF), which can improve soil structure, provide readily available nutrients, and enhance plant growth. This study aimed to determine the effects of varying concentrations of Infarm LOF on the growth and yield of three pakchoy (Brassica rapa L.) varieties to identify the most effective combination for cultivation. The Research was conducted from September to November 2025 in the home yard area of Kp. Cibuah, Cibuah Village, Warunggunung District, Lebak Regency, Banten, using a randomized block design with two factors: LOF concentration and pakchoy varieties. LOF concentration levels were P0 (no LOF), P1 (3 mL/L), P2 (6 mL/L), and P3 (9 mL/L), while varieties included (V1 = Nauli F1, V2 = Flamingo, and V3 = Green). The results showed that P1 (3 mL/L) produced the best growth performance, indicated by plant height and fresh shoot weight. The Nauli F1 variety showed the best growth response across most parameters. In addition, a significant interaction between Infarm LOF concentration and pakchoy varieties was observed for leaf number and leaf greenness. Keywords: Infarm, Pakchoy, Concentration level, Variety
Weed Vegetation Analysis Based on Sdr and Ivi in Peanut (Arachis hypogaea L.) Fields of Cipocok Jaya District, Serang Kurniasari, Amelia Dwi; Hermita, Nuniek; Rumbiak, Julio Eiffelt Rossaffelt; Putri, Widia Eka
Jurnal Agroekoteknologi Terapan Vol. 7 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v7i1.66649

Abstract

Peanuts (Arachis hypogaea L.) play an important role as an agricultural commodity with high economic value and are a source of protein in the community's consumption patterns. This study aims to identify the dominant weed species based on Summed Dominance Ratio (SDR) and Importance Value Index (IVI) in peanut (Arachis hypogaea L.) cultivation areas. The research was conducted from August to October 2025 on farmer group land in Link Beberan, Banjaragung Village, Cipocok Jaya Subdistrict, Serang City, Banten Province. This study used a quadrat method with random sampling plot placement measuring 1 × 1 m2 at 20 observation points. The results found 15 weed species from 8 family with a total of 614 individuals consisting of grass weeds and broadleaf weeds. The weed found in almost all research plots was Rottboellia cochinchinensis with 241 individuals/m2 and a relative value of 39.22%, while the lowest was found in the species Eriochloa with 1 individual/m2 and a relative value of 0.16%. The highest relative frequency value was found in Rottboellia cochinchinensis and Richardia brasiliensis at 20.83%. The highest Importance Value Index (IVI) obtained on peanut fields was 89.10, found in the weed species Rottboellia cochinchinensis. The most dominant weed was Rottboellia cochinchinensis with an Summed Dominance Ratio (SDR) value of 29.03. Weed diversity was classified as medium (H′ = 1.58). The results of the study indicate that differences in the level of dominance between species reflect the relationship between the biological characteristics of weeds and local environmental conditions. Keywords: Weeds, Frequency value, Summed Dominance Ratio (SDR), Importance Value Index (IVI), Peanut plant.
Co-Authors Alfu Laila Kurniasari, Amelia Dwi Nuniek Hermita, Nuniek Putri, Widia Eka Seftiani, Rani Sulistyorini , Endang