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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Indonesian Journal of Geography Buletin Peternakan Jurnal Ilmu Pertanian Journal of Tropical Soils Sains Tanah Pembangunan Pedesaan Journal of Degraded and Mining Lands Management Jurnal Tanah dan Air Planta Tropika Jurnal Zeolit Indonesia Livestock and Animal Research SAINS TANAH - Journal of Soil Science and Agroclimatology Agrin : Jurnal Penelitian Pertanian Martabe : Jurnal Pengabdian Kepada Masyarakat jurnal Ilmu Pertanian (Agricultural Science) JURNAL ILMIAH AGRINECA Molekul: Jurnal Ilmiah Kimia
Eko Hanudin
Jurusan Ilmu Tanah, Fakultas Pertanian, Universitas Gadjah Mada, Jl. Flora, Bulaksumur, Depok, Sleman, Yogyakarta 55281, Indonesia, Telp./fax.: (0274) 563062
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Journal : journal of tropical soils

 1 
The Role of Peat Layers on Iron Dynamics in Peatlands Fahmi, Arifin; Radjagukguk, Bostang; Purwanto, Benito Heru; Hanudin, Eko
JOURNAL OF TROPICAL SOILS Vol. 15 No. 3: September 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i3.195-201

Abstract

The Role of Peat Layers on Iron Dynamics in Peatlands (A Fahmi, B Radjagukguk, BH Purwanto and E Hanudin): The research aimed to study the effect of peat thickness and humification stage of the peat material on Fe solubility at the peatlands with sulfidic material as substratum.  The research was conducted at three conditionals of ombrogen peatlands ie ; deep, moderate and shallow peat. Soil samples were collected by using peat borer according to interlayer (the border layer of peat and mineral layer) and conditional of soil horizons.  The sample point depth were (cm) G.s2 : 25, G.s1 : 50, Int.s : 70,  M.s1 : 90 and M.s2 : 100 for shallow peat, G.m2 : 47, G.m1 : 100, Int.m : 120 and M.m1 : 135 for moderate peat and G.d3 : 50, G.d2 : 150, G.d1 : 200, Int.d : 220  and M.d1 : 235 for deep peat respectively.  The results showed that most of Fe on the tested soils was found in organic forms. The peat layers above the sulfidic material decreased the Fe2+ solubility at peatlands. Fe2+ concentration in peat layer decreased with its increasing distance from sulfidic material. There was any other processes beside complexation and chelation of  Fe2+  by humic material and its processes was reduction of Fe3+ and this conditions was reflected in redox potential values (Eh).
Phosphate Adsorption Capacity of Allophane from Two Volcanic Mountains in Indonesia Airlangga, Tandaditya Ariefandra; Matsue, Naoto; Hanudin, Eko; Johan, Erni
JOURNAL OF TROPICAL SOILS Vol. 25 No. 1: January 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i1.39-46

Abstract

Allophane is known as clay mineral with high capacity of phosphate adsorption via ligand-exchange mechanism. This study aims to compare the phosphate adsorption characteristics by allophane from Mt. Merapi and Mt. Lawu in relation to its chemical and mineralogical properties. The results  of X-Ray Flourescence analysis shows that both allophane samples from Merapi and Lawu have low Si/Al ratio, i.e. 1.18 and 1.16, respectively. Infrared spectral characteristics of the allophane materials indicated that the main adsorption bands appeared at the range of 2700-3700 cm-1 (due to stretching vibration of all hydroxyl (OH) groups), 1400 – 1800 cm-1 (vibration of HOH deformation), and 650 - 1200 cm-1 (vibration between the Si-O-Al). Adsorption experiment of phosphate on allophane samples were conducted at initial adsorbate concentration of up to 2.0 mM and at pH 4.0 and 8.0. Phosphate adsorption capacity of allophane shows that both allophane from Merapi and Lawu are categorized as very high in adsorbing phosphate and fit well with the Langmuir adsorption equation. Phosphate adsorption increases with decreasing pH due to the positive charge sites such as Al-OH2+ in the allophane structure increase. Another reason is the negative charge of phosphate gradually decreases from -2 to -1 with decreasing pH, and the repulsive force between the negatively charged Si-O- in the allophane structure and phosphate anions decreases.
Leaching Characteristics of Udipsamment Ameliored by Mineral Soil and Adhesive Polymer Fibrianty, Fibrianty; Hanudin, Eko; Ma’as, Azwar
JOURNAL OF TROPICAL SOILS Vol. 27 No. 1: January 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i1.17-25

Abstract

Udipsamment  is  characterized  by  sand  fraction  > 95%,  loose,  and  very  high  leaching. This  study  aimed  to determine  the  effect  of  mineral  soil  ameliorants  and  adhesive  polymers  on  the character  of  nutrient leaching  in  Udipsamment.  The  leaching   study  in  lysimeters  used  a completely  randomized  design  with three  replications.  The  treatments  consist  of  bagasse  (B),  mineral  soil included  Inceptisol  (I)  and Vertisol  (V),  and adhesive  polymers included tapioca  1% and 2% (T1  and  T2),  tapioca  dregs  1%  and  2  %  (A1 and  A2),  Polyvinylalcohol  0.1%  and  0.2%  (P1  and  P2).  Combination  of  treatments  are  IB,  VB,  IBT1, IBT2,  VBT1,  VBT2,  IBA1,  IBA2, VBA1 ,  VBA2 , IBP1,  I BP2, VBP1,  and  VBP2.  Observations  were made  before  and  after  leaching.  The  research  showed  that  VBT2  increases moisture-holding  capacity. Amelioration improved the ability of  Udipsamment  to  hold  nutrients,  after leaching  for  six  months,  there was  a  decrease  in  organic  C,  total  N,  and  available  P  compared to before  leaching.  Amelioration increased the  soil  CEC,  even up  to  the  sixth  month  leaching,  the soil  CEC  showed  a  higher value  than  before  leaching.  The  amount  of  clay  fraction  was  relatively  uniform  between  the  surface  and  the  bottom of  the lysimeter,  indicating that   the adhesive   polymer  successfully  bonding  the  clay-sand  particles  and prevented clay leaching.
Co-Authors , Tamad Achmad Fatchul Aziez Airlangga, Tandaditya Ariefandra Angga Ade Sahfitra ARIFIN FAHMI Bambang Hendro Sunarminto Bambang Hendro Sunarminto Bambang Hendro sunarminto Bambang Triyatmo Benito Heru Purwanto Bostang Radjagukguk Cahyo Wulandari Dewi Ratna Nurhayati Didik Indradewa Djoko Soetrisno Eka Tarwaca Susila Putra Endang Dwi Purbajanti Endang Sulistyaningsih Fajarini, Permata Harty Noor Fibrianty, Fibrianty JAKA WIDADA Jauhari Syamsiyah Johan, Erni Kartikawati, Retno Kartikawati, Rina Kurniasih, Budiastuti Lis Noer Aini, Lis Noer Mahyudi Mahyudi, Mahyudi Matsue, Naoto Ma’as, Azwar Muhammad Rif’an Mulyono Mulyono Mulyono, Mulyono Nasrudin Nasrudin Noer Aini, Lis Prapto Yudhono Prapto Yudono Prasetiyanto, Lukas Priyo Priyono Suryanto Puji Dyah Anggraini, Meika Kurnia Putri Ratnasari R. Djoko Sutrisno Rajiman Rajiman Riyadi, Aldy Slamet Sari Widya Utami Sri Nuryani Hidayah Utami Subur Priyono Sasmito Budhi Supriyanto Notohadisuwarno Susanto, Simbar Sulanjari Taryono, Taryono Tohari Tohari Wiratama, Ristiya Adi Y. Prapto, Y.