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All Journal Jurnal Keteknikan Pertanian
B. I. Setiawan
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Agriculture, Biological Sciences & Forestry

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Determination of Hydrodynamic Dispersion Coefficient of Solute Transfort in Soil Using Inverse Problem Method Hermantoro .; B. I. Setiawan
Jurnal Keteknikan Pertanian Vol. 16 No. 1 (2002): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.016.1.%p

Abstract

Solute transport in porous medium is affected by two parameters i.e : 1) average velocity of solute particle, and 2) solute dispersion. Theoretically, the solute transport can be describes by Convective Dispersion Equation, when the methods to determine D in this paper we present a modified method of inverse problem to calculate D. The results indicated that the inverse problem much or less matched with the analytical solution.
Effectivitas of Pitcher Fertigation System on Bushes Pepper Crops Hemantoro .; B. I. Setiawan; S. Hardjoamidjojo; M.H. Bintoro
Jurnal Keteknikan Pertanian Vol. 17 No. 1 (2003): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.017.1.%p

Abstract

The successful application of pither irrigation system has motivated to investigate the pitcher as a fertigation system. The experiment was conducted at Leuwikopo Experiment Station, Agricultural Engineering Departement, Bogor Agricultural University. The main objective of this study is to study the effectiveness of pitcher fertigation system on bushes pepper crops. The result shows that the pitcher wall is capable to release NPK solution. Diffusion rate of fertilizer solution was measured as affected by the concentration inside and outside of the pitcher. The soil moisture distribution in the soil is sufficient to transport the solution available for crops development. Concentration of Phosphate (P) and Potassium (K) decrease laterally and the Nitrogen (N) tends to accumulate homogeneosly in moist part around the pitcher.
Teknik Rekayasa Pemadatan Kayu II : Sifat Fisik dan Mekanik Kayu Agatis (Agathis lorantifolia Salisb.) Terpadatkan dalam Konstruksi Bangunan Kayu Hermantoro .; B. I. Setiawan; S. Hardjoamidjojo; M. H. Bintoro
Jurnal Keteknikan Pertanian Vol. 17 No. 1 (2003): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.017.1.%p

Abstract

The successful application of pitcher irrigation system has motivated to investigate the pitcher as a fetigation system. The experiment was conducted at Leuwikopo Experiment Station, Agricultural Engineering Departemen, Bogor Agricultural University. The main objective of this study is to study the effectiveness of pitcher fertigation system on bushes pepper crops. The result shows that the pitcher wall is capable to release NPK solution. Diffusion rate of fertilizer solution was measured as affected by the concentration inside and outside of the pitcher. The soil moisture distribution in the soil is sufficient to transfor the solution available for crops development. Concentration of Phosphate (P) and Potassium (K) decrease laterally and the Nitrogen (N) tends to accumulate homogeneously in moist part around the pitcher.
Co-Authors Hemantoro . Hermantoro . M. H. Bintoro M.H. Bintoro S. Hardjoamidjojo