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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Journal of Degraded and Mining Lands Management
Rina D. Ningsih
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance

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Tanggap Tanaman Kedelai terhadap Inokulasi Rhizobium dan Asam Indol Asetat (IAA) pada Ultisol Darmaga Rina D. Ningsih; Iswandi Anas
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 32 No. 2 (2004): Buletin Agronomi
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 | Full PDF (1699.641 KB) | DOI: 10.24831/jai.v32i2.1453

Abstract

Some of rhizobacteria have been known to stimulate the growth of some crops through their fitohormon (IAA = indole acetic acid). Those rhizobacteria can stimulate the development of epidermis cells formation at root hair  site and increase the infection sites to increase the nodulation and N2 fixation. The aims of this study were to study the effect of Rhizobium strains inoculation and indole acetic acid (IAA) application on crop growth, root nodulation. and N, P uptake of soybean on the Ultisols. The greenhouse experiment used Completely Randomize Design (CRD) with four replications. The treatments were: I) Without inoculation (blank), 2) 100 ppm N application, 3) 0.4 ppm IAA application, 4) Inoculation of Rhizobium 1004 (106), 5) Inoculation of Rhizobium 1004 (I05) + IAA, 6) Inoculation of  Rhizobium RD-20 (104), 7) Inoculation of Rhizobium RD-20 (106), 8) Inoculation of Rhizobium SNI-2 (106). 9) Inoculation of Rhizobium SNI-2 106 + IAA. Result of the experiment indicated that inoculation of Rhizobium and IAA application increased crop growth, nodulation, and nutrient uptake of soybean. Inoculation of Rhizobium I004(106). RD-20(104)R, D-20(I06),S NI-2(I06), and IAA 0.4 ppm increased dry weight of crop by 33.5%,37.8,17.3%,35.1%,and 3.8% respectively compared to blank. Application of IAA at Rhizobium inoculation treatment of SNI-2(106) and 1004(106i)n creased dry nodule weight on soybean 40.9%, and 55.7 % respectively compared to without IAA application.
Biochar for sustainable rehabilitation of degraded lands: Mechanisms, applications, environmental benefits, and future perspectives Maftu’ah, Eni; Maharani, Puspita Harum; Sulaeman, Yiyi; Mukhlis, Mukhlis; Napisah, Khairatun; Hairani, Anna; Ningsih, Rina D.; Sunardi, Sunardi; Utami, Sri Nuryani H.; Siswadi, Siswadi
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11313

Abstract

Land degradation poses a growing global environmental concern that threatens soil productivity, ecosystem services, biodiversity, and climate resilience. Biochar is generated by thermochemically processing biomass in an oxygen-restricted environment and is a viable nature-based solution for soil degradation and sustainable land management. This review synthesizes recent knowledge on the qualities of biomass-derived biochar, mechanisms for improving soil properties, and its application in different degraded lands, including mine-degraded lands, peatlands, saline and sodic soils, drylands, and eroded agricultural lands. Biochar enhances soil quality and contributes to restoring ecosystems through improved soil aggregation, water and nutrient storage, enhanced cation exchange capacity, soil pH and microbial functioning, and by reducing soil acidity and bioavailability of toxic substances. Furthermore, the use of agricultural and forest residues as feedstock for biochar production helps maintain carbon in the soil over extended periods, reduces greenhouse gases, improves water quality, and supports a circular bioeconomy. However, biochar performance is influenced by several factors, including feedstock characteristics and pyrolysis conditions, soil properties, and environmental considerations. Economic feasibility, quality standardization, and governmental support remain major concerns. The review emphasizes the various functions of biochar in the reclamation of degraded lands and indicates the future research needs to foster sustainable land management and climate change mitigation.
Co-Authors Anna Hairani Iswandi Anas Maftu’ah, Eni Maharani, Puspita Harum Mukhlis Mukhlis Napisah, Khairatun Siswadi Siswadi Sunardi Sunardi Utami, Sri Nuryani H. Yiyi Sulaeman