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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Maya Melati
Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University (Bogor Agricultural University), Jl. Meranti, Kampus IPB Dramaga, Bogor 16680, INDONESIA
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Humic acid and chicken manure improve growth and productivity of organic edamame Regata Ringga Hanessa Putry; Maya Melati; Munif Ghulamahdi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 53 No. 2 (2025): 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.v53i2.63915

Abstract

Edamame (Glycine max L.), a soybean harvested for young pods, has high nutritional content and is promising as an export commodity. Here, organic edamame was produced by incorporating chicken manure and humic acid. This study aimed to evaluate the effects of chicken manure, humic acid, and their interaction on the growth and productivity of edamame. The study used a factorial randomized complete block design with two factors and three replications, and it was carried out at the IPB Experimental Station, Cikarawang A, Dramaga, Bogor, from May to September 2024. The first factor was chicken manure: 0, 8, 16, and 24 tons ha-1, and the second factor was humic acid: 0, 30, 60, and 90 kg ha-1. Vegetative variables were observed at 5 weeks after planting (WAP). The relative growth rate (RGR) and net assimilation rate (NAR) were determined from the period between 3 and 5 WAP. Yield components included the number, length, and weight of pods and pod yield. The results showed that the interaction of chicken manure and humic acid significantly increased root length, RGR, number of flowers, number of productive nodes, plant fresh weight, plant dry weight, pod weight per plant, and pod yield. Chicken manure at 9.5 tons ha-1 and humic acid at 90 kg ha-1 were the optimum doses to significantly increase pod yield. This study highlights the potential use of humic acid to reduce the amount of chicken manure demand in organic farming systems. Keywords: leaf greenness; net assimilation rate; nutrient levels; organic fertilizer; relative growth rate
Effect of row orientation and cowpea row numbers on sweet corn-cowpea intercropping Atikah Fajri; Heni Purnamawati; Maya Melati
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 53 No. 2 (2025): 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.v53i2.66676

Abstract

Intercropping between sweet corn (Zea mays L. var. saccharata Sturt) and cowpea (Vigna unguiculata L. Walp) can improve land productivity, but requires optimization of row orientation and cowpea row number. This study evaluated the effects of row orientation and cowpea row number on the growth, yield, and economic performance of sweet corn–cowpea intercropping. The experiment was conducted from June to September 2024 at the IPB experimental field in Sawah Baru, Bogor, Indonesia. A split-plot design with four replications was employed. The main plots consisted of two row orientations (North–South and East–West), while the sub-plots included maize monoculture, intercropping with one row, and two rows of cowpea. A significant interaction between row orientation and cowpea row number was observed on maize height, leaf number, and stem diameter at two weeks after planting. Although row orientation did not significantly affect maize and cowpea performance, the East–West orientation increased cowpea yield by 14.6% and reduced maize yield by 5.3% compared to the North–South orientation. The East–West orientation combined with one cowpea row produced the highest land equivalent ratio (LER = 1.93) and benefit–cost ratio (R/C = 1.45). Keywords: LER, R/C ratio, aggressivity, competitive ratio
Combined application of broiler chicken manure and PGPR on growth, yield, and amylopectin content of waxy corn “Kumala F1” Abdul Latif; Maya Melati; Dhika Prita Hapsari
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 54 No. 1 (2026): 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.v54i1.69924

Abstract

Glutinous corn or waxy corn is often used as a raw material for flour, while sweet glutinous corn is preferred when fresh harvest. Broiler manure is one of the organic fertilizers that can be used in the organic cultivation of sweet glutinous corn, and it needs to be optimized. The addition of plant growth-promoting rhizobacteria (PGPR) can be used to stimulate plant growth and increase fertilization efficiency. The experiment was conducted from March to August 2025 at IPB Experimental Field in Cikarawang B, Dramaga, Bogor. The experiment used s a randomized complete block design with doses of broiler manure and PGPR as treatment factors with 3 replications. The manure doses were 0, 10, 20, and 30 t ha-1, while 2 levels of PGPR were with and without PGPR. The concentration of PGPR was 20 g L-1 and was applied by soaking the seeds for about 30 minutes. The results showed that the average leaf numbers did not differ significantly at 8 weeks after planting. The highest leaf area index was recorded without PGPR application, while PGPR application increased root length. Amylopectin content showed a significant response at the lowest manure dose of 0 t ha-1. Keywords: amylopectin; C:N ratio; nutrient immobilization; sweet waxy corn.
Co-Authors Abdul Latif Atikah Fajri Dhika Prita Hapsari Faqih Udin Munif Ghulamahdi Regata Ringga Hanessa Putry