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All Journal E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Jurnal Agrista Techno: Jurnal Penelitian Jurnal Ilmiah Pertanian Jurnal Penelitian Sains
Agus Hermawan
Department Of Soil Science, Faculty Of Agriculture, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Mathematics Physics

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Karakteristik Beberapa Sifat Fisika dan Kimia Tanah pada Lahan Bekas Tambang Timah Ibnu Hamid; Satria Jaya Priatna; Agus Hermawan
Jurnal Penelitian Sains Vol 19, No 1 (2017)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (176.324 KB) | DOI: 10.56064/jps.v19i1.8

Abstract

Kegiatan penambangan timah di Bangka Belitung menyebabkan permasalahan sifat fisika, kimia dan tingkat kesuburan tanah yang rendah.  Ciri-ciri tanah berpasir, lapisan top soil hampir tidak ada, keasaman tinggi serta sangat miskin vegetasi dan unsur hara.  Sebagai perusahaan tambang yang mempunyai izin untuk mengakses timah, PT Timah melakukan reklamasi dengan harapan dapat meningkatkan kualitas lahan, memperbaiki atau memulihkan suatu ekosistem rusak atau mengalami gangguan, sehingga dapat pulih atau mencapai suatu ekosistem yang mendekati kondisi aslinya.  Kegiatan reklamasi lahan bekas tambang timah yang telah dilakukan memberikan peningkatan kualitas lahan yaitu terjadi perbaikan beberapa sifat fisika dan kimia tanah dengan meningkatnya kadar liat pada tekstur tanah dan penurunan komposisi fraksi pasir, perbaikan struktur tanah, penurunan bobot isi tanah,  meningkatnya C-organik tanah namun masih dalam kategori sangat rendah, N-total meningkat tetapi masih dalam kategori sangat rendah, KTK meningkat meskipun masih dalam kategori rendah, P-tersedia meningkat dari sangat rendah menjadi rendah, namun belum mampu memperbaiki pH tanah yang masih tergolong sangat masam di semua lokasi penelitian. Kegiatan reklamasi lahan bekas tambang timah perlu dilanjutkan dan ditingkatkan serta perlu adanya pemeliharaan secara rutin untuk lebih memperbaiki kondisi tanah khususnya sifat fisika dan kimia tanah dengan cara memberikan bahan organik dan memilihara vegetasi yang ada.
Modifikasi Titik Muatan Nol Tanah Bermuatan Terubahkan melalui Pemberian Campuran Abu Terbang Batubara-Kotoran Ayam Agus Hermawan; Sabaruddin Sabaruddin; Marsi Marsi; Renih Hayati; Warsito Warsito
Jurnal Agrista Vol 17, No 3 (2013): Volume 17 Nomor 3 Desember 2013
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.372 KB)

Abstract

ABSTRAK. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian campuran abu terbang-kotoran ayam (ATB-KA) terhadap perubahan titik muatan nol (TMN) tanah dan dampaknya terhadap jerapan dan ketersediaan P pada Ultisol. Dua perlakuan yang diuji adalah ATB-KA (w/w 1:1) pada dosis 0, 15, 30, 45 dan 60 ton ha-1, dan pemupukan P pada dosis 0, 87, 174, 261 dan 348 kg P2O5 ha-1.  Perlakuan ini ditata dalam Rancangan Acak Lengkap yang diulang sebanyak tiga kali. Hasil penelitian menunjukkan bahwa aplikasi CATK untuk setiap dosis pemupukan P berkorelasi secara nyata dengan status tanah TMN, pH, muatan negatif, jerapan dan ketersediaan P. TMN berkorelasi positif dengan pH dan muatan negatif. Muatan negatif secara nyata berkorelasi negatif dengan jerapan P, dan berkorelasi positif dengan P tersedia. Modification of PZS of Soil With Variable Charge by Application of Coal Fly Ash-Chicken Manure MixtureABSTRACT. The objective of current research was to study the effect of coal fly ash-chicken manure mixture (FA-CM) on the changes on the soil PZC status and its impact on P sorption and availability in Ultisols. Two treatments - FA-CM mixture (w/w of 1:1) at the rate of 0, 15, 30, 45 and 60 ton ha-1, and P fertilization at the rate of 0, 87, 174, 261 and 348 kg P2O5 ha-1 were tested.  These treatments were arranged according to Factorial Completely Random Design with three replicates. The results showed that the application of FA-CM for each dosages of P fertilizer correlated significantly with the status of soils PZC, pH, negative charge, P sorption and P-available. PZC has possitive correlation with pH and negative charge. Negative charge has a significantly negative correlation with P sorption, and posssitively correlation with P-available.
Perubahan Titik Muatan Nol dan Muatan Negatif Abu Terbang Batubara akibat Penambahan Kotoran Ayam dan Waktu Inkubasi AGUS HERMAWAN; SABARUDDIN SABARUDDIN; MASRI MASRI; RENIH HAYATI; WARSITO WARSITO
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.3, No.4, Oktober 2014
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

ABSTRACT Changes in Point of Zero Charge and Negative Charge of Coal Fly Ash due to Chicken Manures Addition Fly ash, coal combustion residue of thermal power plants, has been regarded as a problematic solid waste all over the world. Due to the environmental problems created by large-scale fly ash generation, efforts are being made to recycle these materials, such as to improve soil fertility as an ameliorant. In the present study, the possibility to improving the status of point of zero charge (PZC) and negative charge in fly ash (FA) and chicken manure (CM) mixtures was investigated. Fly ash was mixed with chicken manure composition of 0, 25, 75, and 100 % FA (w/w basis) and incubated for 15, 30, 45, and 60 days. Treatments arranged in factorial completely randomized design with 3 replicates. The results showed that the compositions of FA-CM and incubation period significantly affect the status of TMN, negative charge, P sorption and available-P. The mix of 50% FA with 45 days incubation tend to have a lower PZC and P sorption and higher negative charge and P-available. This composition could be use as an amelioran to improve the soils chemical properties in terms to decrease PZC and increase negatif charge, and it is necessary for further research.   Keywords: chicken manure, coal fly ash, point of zero charge, negative charge
Performance of paddy crop in swampland under organic pellet fertilization from Azolla and vermicompost Agus Hermawan; Dwi Probowati Sulistyani; Bakri
Jurnal Ilmiah Pertanian Vol. 17 No. 2 (2021): Jurnal Ilmiah Pertanian
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/jip.v17i2.5807

Abstract

This study aimed to examine the effect of applying organic pellet fertilizers from vermicompost and Azolla using coal fly ash as an adhesive on paddy crop response in swampland. The research was performed in a pot experiment using a completely randomized factorial design with two treatment factors. The organic pellet fertilizer doses were: 0 ton ha-1 (a control); 10 ton ha-1; 20 ton ha-1; and 30 ton ha-1 as the first factor. In the second factor, the different NPK fertilizer dose was applied: the absence of NPK fertilizer as a control; 0.5 and 1 time of the recommended dose. The results showed that the application of organic pellet fertilizer significantly improved soil pH but not significant on soil organic C and N levels. There was tendency of increased on soil pH, C-organic, and N-total with the increased doses of organic pellet fertilizers applied. The NPK fertilizer application significantly improved plant height, tiller number and plant biomass as the dose were rised up. The organic pellet fertilizer application significantly improved plant height, number of tillers, and plant biomass. Applying organic pellet fertilizer at a dose of 10 tons ha-1 should be sufficient as no further improvement with the increasing doses.
MICROALGAE POTENTIAL TO DECREASING DISSOLVED AMONIA CONCENTRATION (NH3) ON LIQUID WASTE OF UREA FERTILIZER FACTORY Fadjar Sidiq Hidayahtullah; Agus Hermawan; Nuni Gofar
TECHNO: JURNAL PENELITIAN Vol 8, No 1 (2019): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tk.v8i1.977

Abstract

The purpose of this research to analyzing the abilities of microalgae from various water treatment processes to improving chemical properties (pH, dissolved NH3, BOD, NO3-) the liquid waste of urea fertilizer factory. The sampling method has used the grab sampling method for a certain period. Microalgae sources are obtained from various water treatment processes and mixed with waste of water at a dose of 300 mg L-1. The results showed the source of microalgae clarifier was significantly different in reducing dissolved ammonia concentration, pH, and nitrate. Based on the results of regression analysis and correlation showed that the microalgae population was partially correlated with pH, BOD, nitrate, and dissolved ammonia of 1.61%, 87.70%, 55.38%, and 9.63%. While the concentration of dissolved ammonia significantly affected pH, BOD, nitrate, and microalgae biomass growth of 84.40%.
Co-Authors Bakri Fadjar Sidiq Hidayahtullah Ibnu Hamid Marsi Marsi MASRI MASRI NUNI GOFAR Renih Hayati Sabaruddin Sabaruddin Satria Jaya Priatna, Satria Jaya Sulistyani, Dwi Probowati Warsito Warsito