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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Journal of Tropical Soils
Djunaedi Abdul Rachim
PS Ilmu Tanah, Sekolah Pascasarjana, IPB, Kampus IPB Darmaga Bogor 16680
Agriculture, Biological Sciences & Forestry Environmental Science

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PENGARUH PENGERINGAN CONTOH TANAH TERHADAP BEBERAPA SIFAT FISIK DAN KIMJA TANAH BERSIFAT VERTIK SERTA KLASlFIKASINYA MENURUT TAKSONOMI TANAH Djunaedi Abdul Rachim; Dyah Tjahjandari
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 1 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (959.009 KB) | DOI: 10.29244/jitl.2.1.17-24

Abstract

This laboratory experiment was carried out to study the effect of soil samples drying on the physical and chemical properties of vertic soils and their classification according to soil taxonomy. Usually, soil analysis is held on samples in air-dried condition. Clays of some soil types, however, have irreversible properties upon drying which can cause a bias in the measurement results and classification outputs of the soils. To study the irreversibility of clays upon drying, 25 samples of vertic soils were treated in moist and air-dried conditions prior to analysis. The statistical procedure of Match Pair Comparison was used to test the effect of the treatments. The results showed that the irreversibility of day upon drying was reflected in the measured soil properties except for exchangeable-A! and -K, organic-C. and soil-CEC. Nevertheless, the intensity of the day irreversibility of the vertic soils studied was low. Therefore, the drying treatment did not affect their classification outputs.
NH4+, dan Fe3+ terhadap Ketersediaan K Jerapan dan Pengaruh Na+, NH4+ pada Tanah-tanah yang Didominasi Mineral Liat Smektit Dedi Nursyamsi; Komaruddin Idris; Supiandi Sabiham; Djunaedi Abdul Rachim; Agus Sofyan
JOURNAL OF TROPICAL SOILS Vol 14, No 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.33-40

Abstract

Total content of potassium in smectitic soils is commonly high, however its availability for plant growth is frequently problem because it is fixed at interlayer space of 2:1 type of clay mineral. The research was  aimed to study the sorption and effect of Na+, NH +, and Fe3+  on soil available K at smectitic soils. It  was conducted in Laboratory of Research and Soil Test, Indonesian Soil Research Institute by using four of soil samples taken from Bogor (Typic Hapludalfs), Cilacap (Chromic Endoaquerts), Ngawi (Typic Endoaquerts), and Blora (Typic Haplustalfs). Incubation experiment used Randomized Completely Block Design, 4 treatments, and 5 replications. The treatment consisted of without cation, application of Na+, NH +, and Fe3+ from NaCl, NH Cl, and FeCl respectively at 50% of maximum adsorption level. The results showed that soil sorption, buffering capacity, and maximum sorption of Fe3+ were higher than NH + and Na+, while the variables of NH + were similar with those of Na+. Among the treatments,bond energy constant was in order of  Na+  > Fe3+  > NH +  at Alfisols and it was in order of  Fe3+  > Na+  > NH +  at Vertisols. Among the soils, the soil sorption, buffering capacity, and maximum sorption were in order of Vertisols > Alfisols. The application of Na+ significantly increased soil soluble-K at Chromic Endoaquerts and Typic Endoaquerts; NH + significantly increased soil exchangeable K at Typic Hapludalfs, Chromic Endoaquerts, and Typic Endoaquerts; while Fe3+ significantly increased both variables in all tested soils.
NH4+, dan Fe3+ terhadap Ketersediaan K Jerapan dan Pengaruh Na+, NH4+ pada Tanah-tanah yang Didominasi Mineral Liat Smektit Nursyamsi, Dedi; Idris, Komaruddin; Sabiham, Supiandi; Rachim, Djunaedi Abdul; Sofyan, Agus
JOURNAL OF TROPICAL SOILS Vol. 14 No. 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.33-40

Abstract

Total content of potassium in smectitic soils is commonly high, however its availability for plant growth is frequently problem because it is fixed at interlayer space of 2:1 type of clay mineral. The research was  aimed to study the sorption and effect of Na+, NH +, and Fe3+  on soil available K at smectitic soils. It  was conducted in Laboratory of Research and Soil Test, Indonesian Soil Research Institute by using four of soil samples taken from Bogor (Typic Hapludalfs), Cilacap (Chromic Endoaquerts), Ngawi (Typic Endoaquerts), and Blora (Typic Haplustalfs). Incubation experiment used Randomized Completely Block Design, 4 treatments, and 5 replications. The treatment consisted of without cation, application of Na+, NH +, and Fe3+ from NaCl, NH Cl, and FeCl respectively at 50% of maximum adsorption level. The results showed that soil sorption, buffering capacity, and maximum sorption of Fe3+ were higher than NH + and Na+, while the variables of NH + were similar with those of Na+. Among the treatments,bond energy constant was in order of  Na+  > Fe3+  > NH +  at Alfisols and it was in order of  Fe3+  > Na+  > NH +  at Vertisols. Among the soils, the soil sorption, buffering capacity, and maximum sorption were in order of Vertisols > Alfisols. The application of Na+ significantly increased soil soluble-K at Chromic Endoaquerts and Typic Endoaquerts; NH + significantly increased soil exchangeable K at Typic Hapludalfs, Chromic Endoaquerts, and Typic Endoaquerts; while Fe3+ significantly increased both variables in all tested soils.
Co-Authors Agus Sofyan Agus Sofyan Atang Sutandi Burhanuddin Bahar Dedi Nursyamsi Dedi Nursyamsi Dyah Tjahjandari Elyas Aditya Pradana Julie Dewi Barliana Komaruddin Idris Komaruddin Idris rahmadani, Nur Amaliah Supiandi Sabiham Syntia Nusanti