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Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment)
Published by Institut Pertanian Bogor
ISSN : 14107333     EISSN : 25492853     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Jurnal Ilmu Tanah dan Lingkungan merupakan media yang menyajikan artikel mengenai hasil penelitian dan telaah perkembangan mutakhir dalam bidang ilmu tanah, air, dan ilmu lingkungan sebagai bahan kajian utama.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah
Articles 5 Documents
 1 
Search results for , issue "Vol 6 No 1 (2004): Jurnal Ilmu Tanah dan Lingkungan" : 5 Documents clear
HUBUNGAN NISBAH K/Ca DALAM LARUTAN TANAH DENGAN DINAMIKA HARA K PADA ULTISOL DAN VERTISOL LAHAN KERING A Kasno; Abdul Rachim; Iskandar Iskandar; J. Sri Adiningsih
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 1 (2004): 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 (526.508 KB) | DOI: 10.29244/jitl.6.1.7-13

Abstract

The objectives of this experiment were: (1) to study the effect of K and Ca fertilization on the dynamic of K, (2) to study the relationship between the dynamic of K in the soils with corn growth, and (3) to determine the optimum K requirement on different K/Ca ratio in the soil solution. Ultisol and Vertisol from the upland areas were used for the study. The determination of K and Ca dosage was based on the maximum soil sorption. The experiment was carried out in a greenhouse using the factorial randomized complete design with three replications. Four levels K dosage and three levels Ca dosage were applied in the experiment. The C-7 hybrid of corn was selected as an indicator plant. The result showed that adding K and Ca increased the dry weight of the plant in both Ultisol and Vertisol. In Ultisol, adding of K increased the amount of exchangeable Ca, Mg and K, and water-extracted K, whereas adding of Ca increased the exchangeable Ca and Mg and water-extracted K. The optimum K requirement for Ultisol was 58 mg kg-1 for K/Ca ratio <0.03 and 88 mg kg-1 for K/Ca ratio >0.03. In Vertisol, adding of K increased the exchangeable and water-extracted K, while adding of Ca increased both exchangeable and water-extracted Ca and Mg. The optimum K requirement was 55 mg kg-1 for the K/Ca ratio <0.03 and 171 mg kg-1 for the K/Ca ratio >0.03. Water extracted Ca and Mg showed a negative relationship with the K/Ca ratio both in Ultisol and Vertisol. The positive relationship between K/Ca ratios with water-extracted K was found in Ultisol, and with both exchangeable and water-extracted K in Vertisol. The increase of the K/Ca ratio increased the critical level of exchangeable K and water-extracted K. Keywords: K/Ca ratio, K dynamic, soil solution, Ultisol, upland, Vertisol
BEBERAPA SIFAT SPESIFIK ANDISOL UNTUK PEMBEDA KLASIFIKASI PADATINGKAT SERI: STUDI KASUS DI DAERAH CIKAJANG DAN CIKOLE, JAWA BARAT D. Djaenudin
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 1 (2004): 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 (596.958 KB) | DOI: 10.29244/jitl.6.1.14-21

Abstract

The objective of this research was to study specific soil characteristics of Andisols as series differentiae. Five pedons of Cikajang and Cikole regions were studied. Both regions belong to the wet climate, udic soil moisture regime and isothermic temperature regime. As much as 32 soil samples were taken for analysis of physical, chemical and mineralogical properties follows the standard procedures of The Central Research and Development of Soil and Agroclimate laboratory. The specific soil properties can be used for soil series to differentiate each soil family. In soil family level, pedon Dn-1, Dn-2, and Dn-4 are classified as Typic Hapludand, medial-mixed, isothermic, and pedon Dn-3 and Dn-5 are classified as Thaptic Hapludand, medial-mixed, isothermic. Each soil family consists of two soil series. The properties of buried soil, color, texture, and soil reaction are used for soil series differentiate. Keywords: Andisols, soil series, specific soil characteristics, West Java
KAJIAN PENDUGAAN EROSI SUB DAERAH ALIRAN SUNGAI TUGU UTARA (CILIWUNG HULU) Nono Sutrisno Sa'ad
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 1 (2004): 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 (1043.411 KB) | DOI: 10.29244/jitl.6.1.31-38

Abstract

The research of erosion prediction method at the watershed scale was carried out at Tugu Utara (Upper Ciliwung) sub-watershed in Puncak, West Java, Indonesia from August 2000 to February 2001. The objectives of this study were: ( I ) to predict erosion at watershed scale through an approximation of sediment yield measurement at the outlet of subwatershed, and (2) multiple regression equation and Sediment Delivery Ratio (SDR) prediction. The experiment at Tugu Utara (upper Ciliwung) sub-watershed measured the discharge, surface erosion by soil pan method, sediment yield by sampling at the outlet and SDR. The result showed that the multiple regression equation and SDR Stiff Diagram can be used to predict the erosion at Tugu Utara (upper Ciliwung) sub-watershed. Keywords: Erosion prediction, multiple regression equation, sediment delivery ratio.
Abundance, Biomass and Diversity of Soil Fauna at Different Ecosystems in Jakenan, Pati, Central Java Rahayu Widyastuti
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 1 (2004): 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 (1010.414 KB) | DOI: 10.29244/jitl.6.1.1-6

Abstract

The assessment of soil fauna in three different ecosystems namely teak forest, home garden and fallow paddy field had been studied in Pati, Central Java. The soil fauna was collected using a soil corer of 20 cm diameter to the depth of 0-15 cm from 5 randomized points in the above ecosystems. The soil fauna was t$en extracted in a Berlese funnel extractor. Soil fauna in the home garden showed the highest abundance (2 940 individual m--), followed by teak forest (2 340 individual m-?) and fallow paddy (1 790 individual m-?). The home garden had also a higher soil fauna diversity (2.06) compared to the teak forest (1.82) and fallow paddy (1.67). In terms of soil fauna biomass, the teak forest had a higher value (961 mg m-3 compared to the home garden (368 mg m-3 and fallow paddy (309 mg m"). In these three ecosystems, two fauna groups, i.e. Collembola and Acari were the most abundant animals. Poor vegetation cover tends to reduce the population of soil fauna in the fallow paddy. field, whereas vegetation, found in the home garden and teak forest protected the soil surface from direct sunshine and maintained soil moisture. This condition presumably provided a more favorable habitat for soil fauna. Thus, vegetation cover appears important to maintain soil moisture and soil living-organisms. Keywords: soil fauna, abundance, diversity, ecosystem, vegetation cover
PENINGKATAN IKATAN P DALAM KOLOM TANAH GAMBUT YANG DIBERI BAHAN AMELIORAN TANAH MINERAL DAN BEBERAPA JENIS FOSFAT ALAM W. Hartatik; Komarudin Idris; Supiandi Sabiham; Sri Djuniwati; J. Sri Adiningsih
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 1 (2004): 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 (2434.945 KB) | DOI: 10.29244/jitl.6.1.22-30

Abstract

Peat soils have very low capacity in retaining P. Mineral soils rich in Fe could be used as ameliorant in increasing this capacity. The aim of this experiment was to study the use of three rock phosphates and SP-36 on peat amended with mineral soil in increasing P retention. The experiment was conducted in the laboratory of the Centre for Soil and Agroclimate Research and Development, Bogor. P treatments consist of four P fertilizer sources including Morocco rock phosphate, Christmas rock phosphate, Ciamis rock phosphate, and SP-36, and three P level (50, 100 and 200% of P sorption) plus partial and complete control in 2 replications. The experiment conducted in the soil column made from PVC pipe 4 inches in diameter. The column was filled with 1,250 g peat dry weight (10.5 oC), 250 g of which was amended with mineral soil and each of three rock phosphates or SP-36, and put on as the upper part of the column and incubated for 4 weeks. Leaching was conducted every day, with 50 cc distilled water for 12 days. The filtrate was collected in 500 cc Erlenmeyer glass, and soluble P was analyzed. After this step peat in the colu~nnw as divided into seven depth that was 0-5, 5-10, 10-20, 20-30, 30-40, 40-50 and 50-60 cm, then P-Bray I was analyzed. The results showed that the application of Morocco and Ciamis rock phosphates on peat amended with mineral soil after leaching, resulting in the accumulation of P on the upper layers, suggesting that P retention on peat was increased such that P loss could be reduced. The ratio of P content in the soil column at 0-30 cm and 30-60 cm depth for Morocco rock phosphate on the dosages of 50, 100 and 200% of P sorption were 1.54; 1.90; and 2.79, respectively, and that for Ciamis rock phosphate were 1.64; 1.76 and 4.11, respectively. The application of Christmas rock phosphate resulted in P accumulation at 30-40 cm depth. The ratio of P content in soil column treated with Christmas rock phosphate at 0-30 cm and 30-60 cm depth on dosages of 50, 100 and 200% of P sorption were 1.05; 1.11 and 1.38, respectively, suggesting that P was leached to the bottom layer. It seems that high Fe in Christmas rock phosphate did not contribute to an increase of P retention. Although the application of SP-36 resulted in P accumulation at the upper layers, P leaching was higher. Keywords: Amelioration, Peat, Phosphorus fertilization, Phosphorus retention

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