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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Journal of Agrosociology and Sustainability
Sudoyo, Bobot
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Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Environmental Science Medicine & Pharmacology

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Propagule origin and soil organic carbon content determine the growth and yield of Amorphophallus muelleri Blume Sudoyo, Bobot; Hariyadi; Santosa, Edi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 52 No. 1 (2024): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v52i1.51474

Abstract

Amorphophallus muelleri Blume locally called Iles-iles or porang becomes a new commercial commodity in Indonesia. The tuber as the most economic value contains high glucomannan. It has been speculated that the high variation in production among farmers is due to different planting materials and soil organic carbon (SOC). Thus, the research aimed to evaluate the growth and yield of A. muelleri from different planting materials and levels of SOC. The research was carried out at Leuwikopo Experimental Station IPB Bogor from December 2021 to August 2022, using a nested design. The main plot was the level of SOC (2%, 3%, 4%, 6%), and the sub-plot was planting materials (seeds, bulbils, and tubers from leaf cuttings). The results showed SOC status determined growth and yield. Plant height, stem diameter, number of leaves, canopy width, leaf greenness, number of tubers, weight, and size of tubers, stomatal conductance, and intercellular CO2 were significantly affected by SOC level. SOC at a level of 6% stimulated the highest growth and yield. Planting materials also determined the growth and yield. Plants originating from bulbils produced the highest yields, followed by tuber from leaf cuttings, and seeds. It is recommended to plant bulbils accompanied by maintaining SOC at a level of 6%.
Effect of coconut waste and chicken manure on the growth and yield of caisim (Brassica juncea L) Sudoyo, Bobot; Agusta, Herdhata
Journal of Agrosociology and Sustainability Vol. 3 No. 2: (January) 2026
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/jassu.v3i2.2026.2445

Abstract

Background: Coconut waste and chicken manure present innovative solutions for enhancing the growth and yield of caisim crops. Cocopeat is one of the organic growing media that is increasingly popular in modern horticultural cultivation. Utilizing coconut waste as a planting medium improves aeration and water retention, both of which are crucial for the development of caisim roots. Methods: This study used a randomized group design with five soil treatments to evaluate caisim growth. Parameters included plant height, leaf number, biomass, and soil nutrient content, analyzed using ANOVA and DMRT. Findings: The study revealed that the P3 treatment (soil:cocopeat:chicken manure = 1:1:1) produced the tallest caisim plants, highest leaf number, and greatest fresh weight. Nutrient balance and organic matter improved plant growth, transpiration, and stomatal conductance, while excessive nitrates and pH deviations reduced leaf formation. Total dissolved solids and electrical conductivity positively correlated with growth, highlighting the importance of balanced planting media for optimal vegetative development and biomass accumulation. Conclusion: The results revealed that the composition of the planting medium significantly influenced morphological growth, nutrient content, and the correlation between various growth parameters of caisim plants. Novelty/Originality of this article: The treatments P3 (soil: cocopeat: chicken manure in a ratio of 1:1:1) and P4 (1:2:1) yielded the best outcomes, resulting in increased plant height, fresh weight, and nutrient content, including nitrogen, phosphorus, and potassium. Additionally, these treatments produced optimal Total Dissolved Solids (TDS) and Electrical Conductivity (EC) values, which are essential for effective nutrient absorption.
Co-Authors Edi Santosa Hariyadi Herdhata Agusta