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INDONESIA
JURNAL SAINS DAN TEKNOLOGI INDONESIA
Published by Badan Pengkajian dan Penerapan Teknologi
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education,
Computer Science & IT Education
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Articles 12 Documents
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Search results for , issue "Vol. 11 No. 3 (2009)" : 12 Documents clear
PENGARUH PUPUK AKAR (NPK) DENGAN PUPUK DAUN (MULTIMIKRO) DAN ZAT PENGATUR TUMBUH (ETHREL) TERHADAP PERTUMBUHAN VEGETATIF TANAMAN LADA Mulyono, Daru
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 3 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (51.371 KB) | DOI: 10.29122/jsti.v11i3.832

Abstract

The objective of the research was to investigate the effect of root fertilizers NPK (Nitrogen, Phospor, and Potassium) combined with leaf fertilizer (Multimikro) and Growth Regulating Substance (Ethrel) to the vegetative growth of pepper plants. Theresults of the research showed that the use of root fertilizers NPK (dosage: 2.5; 5.0; and 10.0 g/plant) increased the plants height of 12,0 cm, 19,8 cm, and 23,1 cm respectively. The use of root fertilizers NPK (dosage: 2.5; 5.0; and 10.0 g/plant) combined with leaf fertilizer Multimikro (dosage 1.5 ml/l) increased plant height significantly 15.4 cm, 23.3 cm, and 26.9 cm respectively. Moreover, the use of root fertilizer NPK (dosage: 2.5; 5.0; and 10.0 g/plant) combined with Growth Regulating Substance Ethrel (dosage 1.5 ml/l) increased the vegetative growth of pepper plants significantly to a high of 18.4 cm, 28.4 cm, and 32.5 cm respectively. Conclution of the research indicated that the combination between NPK fertilizer and Ethrel was better than the combination between NPK fertilizer and Multimikro to the vegetative growth of pepper plants.
MENGHITUNG KEBUTUHAN PENGERING GABAH DI KECAMATAN CIOMAS BOGOR DENGAN METODE MONTE CARLO Manalu, Lamhot P.
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 3 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (97.811 KB) | DOI: 10.29122/jsti.v11i3.837

Abstract

Sun drying is the traditional method for drying and still preferred in Asia because cheap compared to mechanical drying. Since it uses the sun as heat source it is friendly to the environment, many farmers, grain collectors, traders and millersoften dry their paddy on pavements that specifically constructed for drying. Sundrying pavements have the advantages of high capacity and thus economics of scale, but the weakness is very dependent on the weather. The amount of paddy that can be dried with a drying depends on the number of sunny days, so it is important to know the probabilities of rainy day based on the historical climate data in a region. From these, simulations can be done to calculate how many dryer machines should be provided to overcome the lack of drying capacity. This methodis known as Monte Carlo. This paper presents a study to determine the amount mechanical dryer needed based on the failure probability of sun drying pavements using monte carlo simulation methods in the District of Ciomas, Bogor.The study results based on 10 years daily rainfall data the probability of rainy days in March (0.62) was greater than in September (0,37), so that the total capacity of dryer machine to be prepared is 110 tons/ day. That was equal to 11 units dryerswith 10 tons / unit in capacity.

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