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All Journal Jurnal Ilmu Pertanian Indonesia Journal of Degraded and Mining Lands Management
Raharjo, Hardi Rahmat
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Fermented Kasgot and SP 36 Fertilizer as Inputs for Purple Corn Cultivation in Ultisol Soil Raharjo, Hardi Rahmat; Supartoto, Supartoto; Herliana, Okti
Jurnal Ilmu Pertanian Indonesia Vol. 30 No. 2 (2025): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.30.2.406

Abstract

The purpose of this research was to determine the effect of fermentation kasgot and SP-36 fertilizer on purple corn in Ultisol soil. The research was carried out in the Screenhouse Food and Horticulture Corps Seed Agency, Bojong Village, Kembaran District, Banyumas Regency, from February to July 2022. The experiment used Randomized Block Design (RBD) with 2 treatments and 3 replications. The treatments were fermentation kasgot fertilizer with 3 levells, namely kasgot without fermentation, kasgot fermented with EM4, and kasgot fermented with Trichoderma sp.; and the second treatments were dose of SP-36 fertilizer with 3 levells, namely 50 kg/ha, 75 kg/ha, 100 kg/ha. The result showed that fermentation kasgot with EM4 increased wet crop weigth to 9,03% and wet seeds weight by corncob to 27,56%, while fermented kasgot with Trichoderma sp. increased dry seeds weight by corncob to 29,13%. SP-36 fertilizer effect in corncob diameter and P uptake in plant. Dose of 50 kg/ha increased corncob diameter to 6,58% and P uptake in plant to 23,03%. There was significant interaction between fermented kasgot with EM4 and SP-36 fertilizer dose by 50 kg/ha that increased dry plant weight to 36,98%. Keywords: kasgot, fermentation, purple corn, SP-36 fertilizer
The effect of microorganisms, manure, and citronella on the Pb and Cd content in heavy metal-contaminated soil and potato yields Tamad; Maryanto, Joko; Saparso; Kurniawan, Ruli Eko Kusuma; Surono; Hanifa, Hana; Leana, Ni Wayan Anik; Amar, Haidar; Raharjo, Hardi Rahmat
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.10039

Abstract

The Dieng region in Central Java, Indonesia, is a major horticulture commodities center, covering approximately 3,000 hectares of Andisols. Since the 1980s, long-term use of organic and inorganic fertilizers as well as pesticides has led to the accumulation of heavy metals, such as lead (Pb) and cadmium (Cd). Pb contents in Andisols generally remain below the Environmental Protection Agency (EPA) standard, except in Sikunang, and Cd exceeds the standard in both Sembungan and Jojogan Wonosobo. In potato tubers, Pb content exceeds the SNI 7378-2009 threshold in Wonosobo and Pekasiran Banjarnegara, while tubers from other areas are below standard. The Cd content in tubers from Jojodan and Kalilembu Wonosobo, as well as Pekasiran and Kepakisan Banjarnegara, also surpasses the standard, but in other areas, it is below standard. The use of remediators composed of chicken manure enriched with Pseudomonas sp, Dark Septate Endophytes (DSE), and Citronella (Cymbopogon nardus) as phytoremediators reduced Pb and Cd levels in both soil and potato tubers. Therefore, the best remediation strategy for mitigating heavy metal contamination included the combination of Pseudomonas sp., DSE, and citronella. These treatments did not significantly affect potato yield. The correlation among variables shows that Pb and Cd levels in potato tubers were influenced by the respective soil concentrations. However, no correlation was observed between soil heavy metal content and tuber yield.
Co-Authors Amar, Haidar Hanifa, Hana Joko Maryanto Kurniawan, Ruli Eko Kusuma Leana, Ni Wayan Anik Okti Herliana, Okti Saparso Supartoto, Supartoto Surono Tamad