Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Jurnal Zeolit Indonesia Jurnal Sains Teh dan Kina
Pudjo Rahardjo
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Education Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
NPK FERTILIZER SLOW RELEASE WITH ZEOLITE AS ONE FILLER AT TEA GARDEN Pudjo Rahardjo
Jurnal Zeolit Indonesia Vol. 7 No. 2 (2008)
Publisher : Jurnal Zeolit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The fertilizer is one of factors production besides land, water, seed, and cultivation technology. Without giving fertilizer which suitable with recommendation the needs of the plants to fulfill nutrient balance, potential product or potential of plant genetics will not be achieved. Proper fertilizer is giving fertilizer with exactly type, right dosage, correct method and time, and effectively to increase productivity, and economics efficiency. This is contained in slow release fertilizer which wearing zeolite filler. NPK fertilizer slow release using zeolite as one of filler with ratio of N:P:K:Mg = 25:5:10:2 and 23:7:10:2 with doses of 400, 600, and 800 kg/ha/year applied on two times a year. Whereas, recommended doses is using a singular fertilizer of N= 300, P2O5 = 94, K2O = 180, MgO = 54 kg/ha/year, 4 applications/year. Dosage of 800 kg/ha/year of formula I and formula II was increasing treetops. Dosage of 400 kg/ha/year and 600 kg/ha/year giving lower treetops. It is compared with the control without fertilizer treatment was showed a significant increase (115 to 129%) in clones of tea 2025 in Tea Garden Canaan.
Preservation of fish using instant extract of green and black tea Tutun Nugraha; Anthony Fernando; Pudjo Rahardjo
Jurnal Penelitian Teh dan Kina Vol 15 No 1 (2012)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v15i1.17

Abstract

The use of illegal and hazardous preservative agents such as formalin by traditional fishermen and trader has become a problem in Indonesia.  In this research, instant extract powder of green tea and black tea were used as natural preservatives for fish. Both substances are known for their anti-bacterial and anti-oxidative activities due to the presence of various types of polyphenols, particularly the catechin groups. The tea extract powder was produced  by drying  using a spray drying device. The two different tea extract powders were tested separately, and in combination. The tests were done by dipping pieces of fresh indian mackerel fish (Rastrelliger kanagurta), also known locally as kembung banjar, in the solution containing the tea extract. The microbial tests were done using total plate count (TPC) method. The result showed that instant green and black tea extracts was capable in suppressing bacterial growth in fish. When the two substances were mixed together, the preservation activities were found to be stronger than if they were used separately. In addition, histamine and total volatile base nitrogen (TVB-N) tests which are regularly used to test the freshness of fish also showed substantial improvement in the quality of the fish sample. The sensory tests also showed that the extracts were capable of improving the freshness of the fish sample. 
Co-Authors Anthony Fernando tutun nugraha