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All Journal Journal of Tropical Soils Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati AGRIVITA, Journal of Agricultural Science Jurnal Agroteknos Jurnal Tanah dan Air Jurnal Penelitian Pertanian Terapan Jurnal Ilmu Tanah dan Sumber Daya Lahan
Bambang Hendro Sunarminto
Department of Soil Science, Faculty of Agriculture, Gadjah Mada University, Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Journal : Jurnal Agroteknos

 1 
PERKEMBANGAN TANAH DARI LAPUKAN BATUAN ULTRABASA PADA DUA TOPOSEKUEN DI SULAWESI TENGGARA Sunarminto, Bambang Hendro; Siradz, Syamsul Arifin
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Jurnal Agroteknos

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The study of soil development of weathering ultramafic rocks have been performed on several toposequence in Sulawesi Tenggara in Puriala Subdistrict of Konawe District and in Lasusua Subdistrict of Kolaka District from December 2010 until Juni 2011. The results showed that soils developed from ultramafic rocks weathering low rainfall (torric) in Puriala have a more coarse texture (LS, SL, L, SiL, CL, C), impervious container which was more shallow (20-90 cm), land of color tend to be brown (7.5 YR), pH 6.8 to 7.6, C-organic 0.57 to 0.93%, CEC 26.20 to 69.61 cmol(+)kg-1, the number of base 11.90 to 15.86 cmol(+)kg1, Fe-d 3.79 to 16.12%, Al-d 0.14 to 1.65%, smectite clay minerals, sand mineral feldspar hematite compared soils developed from ultramafic rocks weathering high rainfall (udic) in Lasusua color tends to be more red (2.5 YR), with a finer texture (SiCL, C) and impervious container deeper (70 -> 150 cm), pH 6.1 to 7.0, C-organic 1.20 to 1.86%, CEC 11.29 to 31.60 cmol(+)kg-1, the number of bases 2.72 to 13.33 cmol(+)kg-1, Fe-d 21.62 to 27.04%, Al-d 0.87 to 3.58%, gutit smectite clay minerals, sand mineral feldspar-magnetite-hematite. Soil weathering from ultramafic rocks with high rainfall experienced base cations leaching was higher mainly characterized by high mobility of cations with CEC and a lower base amount, and the accumulation of low mobility of cations is characterized by high Fe-d and Al-d. Level of soil development began from P2 (Entisol), P1 (Vertisol), L2 (Inceptisol), P3 (Inceptisol), L1 (Alfisol) and the last L3 (Oxisol) the most advanced of soil is on the middle slope, the next is soil on summit, and the last is soil on toeslopes
DETEKSI DAN PENGHITUNGAN KERAPATAN INOKULUM Phytophthora capsici DALAM TANAH DENGAN MENGGUNAKAN UMPAN DAUN LADA BANDE, LA ODE SANTIAJI; HADISUTRISNO, BAMBANG; SOMOWIYARJO, SUSAMTO; SUNARMINTO, BAMBANG HENDRO
Jurnal Agroteknos Vol 4, No 3 (2014)
Publisher : Jurnal Agroteknos

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Abstract

Phytophthora capsiciis a causal agent for footrot disease in pepper and classified as a soil-borne pathogen. The inoculums of P. capsici in the soilis difficultto detect. The dynamics of P. capsici population in the soil is frequently and rapidly fluctuates and hard to detect, causing the pathogen to produce disease rapidly. The aimsof this research were todetect the pathogen P.capsici using black pepper leaf baiting and to quantify the inoculum of the pathogen P.capsici in the soil belonging to several disease intensities of the black pepper foot rot in the field. The first experiment: detecting the pathogen P. capsici using black pepper leaf baiting in the soil artificially infested using several sporangia, anda second experiment: quantification of propagul of the P.capsici in various categories of intensity on the black pepper foot rot disease in the field. The research results showed that the black pepper leaf baiting could be used to detect the existence of the propagul of P.capsiciin the soil artificially infested in various densities of sporangia.  The increase in disease intensity occurred in parallel with the greater density of P. capsici inocula in soil. The density of P. capsici inocula in the soil tended to decline when the disease intensity reached the highest level.
KARAKTERISTIK BAHAN INDUK TANAH DARI FORMASI GEOLOGI KOMPLEKS ULTRAMAFIK DI SULAWESI TENGGARA Alam, Syamsu; Sunarminto, bambang Hendro; Siradz, Syamsul Arifin
Jurnal Agroteknos Vol 2, No 2 (2012)
Publisher : Jurnal Agroteknos

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The research aiming to study the characteristics of the soil parent material ultramafic Complex Geologic Formations in the Southeast Sulawesi has been carried out in December 2010 to  June 2011 .  Fieldwork was conducted at  two different locations, namely in  the District Lasusua, North Kolaka and in the District Puriala, Konawe. Laboratory studies were conducted using thin section rock and extraction with concentrated acid extraction using HNO3 + HF to determine the mineral composition and chemical composition of total elemental rock. The research results showed that the type of host rock found commonly included peridotite and serpentinite group which were the main constituents of the rock group  Ultarmafik complex  geological formations. The  dominant  mineral  found  in  rocks peridotite included olivine followed by some minerals such as antigorit accompaniment, enstantit, and hornblende, picotit, plagioclase feldspar and anthophyllit. The dominant mineral types found in serpentinite rocks included olivine and antigorit accompaniment followed by  minerals such as  enstantit, plagioclase feldspar and  anthophyllit. Elemental composition of the rock group ultramafic complex geological formations were characterized by low contents of SiO2  and Al2O3  compared to other rocks, as well as contained relatively high MgO, CaO and Na2O. Kata Kunci : soil parent material, geologic formations, mineral composition, ultramafic, 
Co-Authors Abdul Syukur Bambang HADISUTRISNO Denah Suswati Didik Indradewa Dja’far Shiddieq Eko Hanudin Endang Sulistyaningsih Eny Faridah Hidayat Pujisiswanto La Ode Santiaji Bande M. Tufaila Muhammad Anshar Prapto Yudono Retno Prayudyaningsih Sari Widya Utami Shiddieq, Djafar Shiddieq, Dja’far Sulakhudin Sulakhudin Sulakhudin, . Sumardi . Susamto Somowiyarjo SYAMSU ALAM Syamsul Arifin Tohari Tohari