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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
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Search results for , issue "Vol 10 No 1 (2008): Jurnal Ilmu Tanah dan Lingkungan" : 5 Documents clear
The Effect of Calcium Silicate on The Phosphorus Sorption Characteristics of Andisols Lembang West Java Arief Hartono
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 1 (2008): 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 (407.017 KB) | DOI: 10.29244/jitl.10.1.14-19

Abstract

The effect of calcium silicate CaSiOJ the phosphorus (P) sorption characteristics were studied in Andisols Lembang.The amount of 0, 2.5 and 5% CaSiOJ (calcium silicate) or 0, 7.5 and 15 g calcium silicate per pot was added to the 300 g(oven-dry weight) soil and incubated for one month. A completely randomized design in double replication was set up. After one month incubation, P sorption and P sorption kinetic experiments were conducted The results of P sorption experiment showed that P sorption data were satisfactorily described by the Langmuir equation. which was used to determine P sorption maxima, bonding energies and P sorbed at 0.2 mg P £"' (standard P requirement). The application of calcium silicate did not affect significantly P sorption maxima but decreased significantly the P bonding energies. Calcium silicate also decreased significantly the standard P requirements. As for P sorption kinetic experiment. the results showed that application of 5% calcium silicate decreased significantly the rate constant of P sorption and P sorbed maximum at given amount of added P. The results suggested that the application of calcium silicate to the Andisols made added P was more available for plant.
Application of Fuzzy Sets Function for Land Attributes Mapping Dwi Putro Tejo Baskoro
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 1 (2008): 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 (480.976 KB) | DOI: 10.29244/jitl.10.1.20-26

Abstract

A study was conducted to evaluate the potential use of Geographical Information System (GIS) for mapping thebiophysical resources of watershed PC-based GIS soft-wares were used in the analysis, processing and mapping of spatialdata. The conventional mapping technique that presents land attribute in form of polygon with abrupt change across classboundaries was improved using Fuzzy technique. This technique involves the generation of membership maps for each soiltype based on the relationship between the soil type and it's forming factors like geology, elevation, slope gradient, slopeaspect, slope curvature, and land cover. The fuzzy technique was found to be more appropriate than the conventionaltechnique of mapping in expressing continuous and gradually changing soil or land attributes. Validation with observed soilor land attributes values indicated that root mean square error (RMSE) obtained for Fuzzy method was lower than that fromthe conventional method
The Effects of Organic Matter and N, P, K Fertilizer on Nutrient Uptake and Yield of Corn in Inceptisol Ternate Idris Abd Rachman; Sri Djuniwati; Komarudin Idris
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 1 (2008): 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 (520.157 KB) | DOI: 10.29244/jitl.10.1.7-13

Abstract

The objective oj the research was to study the effects oj organic matter and N, P, K Jertilizer on nutrients uptake andyield oj corn in Inceptisol Ternate. The design oj the research was Jactorial completely randomized block design with twoJactors. The first Jactor was the rate oj organic matter (0, 20, 40 tlha) or (B(), B, and B z) and the second Jactor was the rate oj N, P, KJertilizer (0.5; I and /.5 recommended rate) or (Flo F] and F JJ. The results oj research showed that combination oj B ,F] gave the highest amount oj the corn leave at 42 days afterplanting, the weight oj corn with husk cover, the weight corn grains, and K-availability oj soil. Whereas, the rate oj 20 tlhaorganic matter (B,) significantly increased and gave the highest weight oj corn without husk cover, NPK corn plant contentand P uptake. The average NPK plant uptake oJcorn was 31.41-39.39 kg Nlha, 6.03-/2.54 kg Plha, 37.5-41.70 kg Klha. The average production oj corn was 5. /6-7.83 tlha.
EFEKTIFITAS EMBUNG UNTUK IRIGASI TANAMAN HORTIKULTURA DI CIKAKAK SUKABUMI Suria Darma Tarigan
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 1 (2008): 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 (65.465 KB) | DOI: 10.29244/jitl.10.1.1-6

Abstract

Dryland farming provides a promising opportunity in increasing agricultural production in rural areas. But, the lack of available water during dry season poses a problem in developing dryland farming. An effective water conservation technique should be developed to alleviate this problem. The use of a small farm reservoir (embung) can be considered as one viable option for such conservation techniques. The purpose of this research was to study the effectivity of small farm reservoirs to supply irrigation water for horticulture commodities. Two different types of small farm reservoir (SFR) were constructed in the micro catchment for the research, i.e. a) SFR built with concrete, b) SFR built without concrete. SFR built with concrete had higher water available for irrigation, which is 34% higher compared to SFR without concrete. In addition, the empirical equation that was used in this research was quite reliable in predicting colected water in the SFRs. Using 80% monthly rain probability, on average one small farm reservoir with dimension 8 m x 2m x 2 m was able to supply irrigation water for 100 m2 horticulture plants for the whole growing period. Keywords: Small farm reservoir, dry season, irrigation, dryland farming.
THE SYSTEM OF RICE INTENSIFICATION (SRI) AS A SYSTEM OF AGRICULTURAL INNOVATION Norman Upboff
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 1 (2008): 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 (1210.418 KB) | DOI: 10.29244/jitl.10.1.27-40

Abstract

The System of Rice Intensification (SRI). developed in Madagascar some 25 years ago. is gaining increasing credence and momentum as probably 500.000 farmers in more than 20 countries are now using its methods to raise their rice. production -- while also reducing their use of external inputs and production costs. Rather than focus on the innovation itself, this paper will introduce SRI only briefly, focusing instead on the transnational system for innovation that has emerged in response to this agronomic opportunity that can be particularly beneficial for resource-limited households. Within SRI's conceptual and practical framework. farmers have devised many innovations. These are the focus of a parallel paper written for this workshop. That paper considers how farmers have made the original SRI methodology less labor-intensive (even labor-saving). and how they have extended methods devised for irrigated rice production both to unirrigated (rainfed) areas for growing rice and to other crops beyond rice. This paper is concerned with what can be considered as a de facto 'system of innovation' that surrounds and has accelerated the spread of SRI worldwide. SRI has differed from most other agricultural innovations in the extent to which farmers have voluntarily invested their own time and resources in taking SRI to peers as an impressive example of farmer-to-farmer extension. Also. innovative alliances have formed among diverse persons and organizations to disseminate and adjust the methodology. thereby supporting the spread of this innovation even despite resistance from some established institutions.

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