Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal JOURNAL OF SCIENCE AND APPLIED ENGINEERING Seminar Nasional Lahan Suboptimal BUANA SAINS
A. Hamzah
Unknown Affiliation
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Electrical & Electronics Engineering Engineering Mathematics Physics Social Sciences Other

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Karakteristik Fisika Kimia Tanah pada Sistem Agroforestri Rossyda Priyadarshini; A. Hamzah; Maroeto Maroeto; B.W. Widjajani
xxxx-xxxx
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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

Abstract

Priyadarshini R, Hamzah A, Maroeto M, Widjajani BW. 2020. Soil physico-chemical characteristics on agroforestry systems. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 Oktober 2020. pp. xx.  Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).The composition, structure and type of vegetation are determined by land management patterns and their closely related with the organic matter input, which in turn will determine soil physico-chemical characteristics, in particular soil bulk density, organic-C, and N mineralization. This study aims to measure and compare the soil physico-chemical characteristics and nett N-mineralization, and also nitrogen leaching on agroforestri systems with different levels of tree diversity. The research was conducted on 2 (two) types of agroforestry systems with different compositions; namely simple agroforestry and complex agroforestry. The research was conducted in the Sumber Brantas sub-watershed which is located at 1150 17’00” to 118019’00” East Longitude and 7055’30” to70 57’30” South Latitude, on 3 (three) different plots for each type of agroforestry. The results showed that complex agroforestry systems had a greater input of organic matter (6.55 Mg ha-1) than simple agroforestry (4.68 Mg ha-1), with soil mineral N content of 108.2 kgha-1 and respectively. 120.2 kg ha-1 for complex agroforestry and simple agroforestry. The leached nitrate in the agroforestry systems was also greater (3.16%) than the simple agroforestry systems(1.83%) which was managed with a greater porosity in the complex agroforestry systems indicated by the lower value of soil bulk density (0.84 gcm- 3) compare with simple agroforestry (1.09 gcm-3).
Design Lighting Quality Based on DIALux Evo 8.1 R. Febriyursandi; A.Z. Azriyenni; A. Hamzah
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 2, No 2 (2019): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.483 KB) | DOI: 10.31328/jsae.v2i2.1183

Abstract

This research develops and implements methods for calculating lighting systems for classrooms in the Khairul Ummah Boarding School. The lumen is used to determine the number of luminaires needed to improve lighting quality following SNI 6197:2011. The number of luminaires obtained from this study was entered into the DIALux Evo 8.1 software. The results obtained of this study indicate that the lighting in the classroom at Khairul Ummah Boarding School didn’t reach the recommended standard, the direct measurement results of the average lighting level of class A was 10.79 lux, while the class X-IPA-3 was 11.66 lux. To improve this condition, class A requires 15 luminaires, and X-IPA-3 requires 12 luminaires. The difference in the results obtained from the two calculations for class A is 0.6%, and X-IPA-3 is 3.4%. Investment costs are needed to improve the lighting system in these classes worth Rp.2,700,000.00 to provide 27 lamps.
PENGGUNAAN TANAMAN Vetiveria zizanoides L. DAN BIOCHAR UNTUK REMEDIASI LAHAN PERTANIAN TERCEMAR LIMBAH TAMBANG EMAS Hamzah, A.; Kusuma, Z.; Utomo, W.H.; Guritno, B.
BUANA SAINS Vol 12, No 1 (2012): Edisi Khusus
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (193.119 KB) | DOI: 10.33366/bs.v12i1.150

Abstract

Degradation of agricultural soils is not only due to application of over dose fertilizers and pesticides, but also industrial and mining activities. In Indonesia there are 713 spots of small scale gold mining surrounding agricultural land, and the process of amalgation is potential for heavy metal pollution. The aim of this study was to evaluate the use of Vetiveria zizanoides L and biochar to remediate soils contaminated with small scale gold mine tailings containing Hg and Pb.. The results indicated that soil pH decreased from 9,1 to 6-7 due to micing FeSO4 into cow manure and biochar, and also increased soil C-organic, N, P, K and CEC. Vietiveria zizanoides grown in the tailing medida showed capability to absorb Hg and Pb from the soil and stored in the root (Hg 88,91% and Pb 51,17%), leaves (Hg 11.09% and Pb 48.83%)
Co-Authors Azriyenni Azhari Zakri B.W. Widjajani Guritno, B. Kusuma, Z. Maroeto Maroeto Priyadarshini, Rossyda R. Febriyursandi Utomo, W.H.