Article Per Year (5 Year)
p-Index From 2021 - 2026
0.562
P-Index
This Author published in this journals
All Journal Jurnal Silvikultur Tropika (JST) Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Reaktor Jurnal Sumberdaya Lahan Jurnal Tataloka SAINS TANAH - Journal of Soil Science and Agroclimatology Journal of Regional and Rural Development Planning Soil REns Jurnal Sumberdaya Lahan Jurnal Tanah dan Iklim
Darmawan
Departemen Ilmu Tanah Dan Sumberdaya Lahan Institut Pertanian Bogor, Jalan Meranti Kampus IPB Dramaga Kab. Bogor 16680 Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Materials Science & Nanotechnology Social Sciences

Published : 12 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 12 Documents
Search

 1   2 
Characteristics of Biochars from Plant Biomass Wastes at Low-Temperature Pyrolysis Liska Mutiara Septiana; Gunawan Djajakirana; Darmawan Darmawan
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 1 (2018): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1464.185 KB) | DOI: 10.15608/stjssa.v15i1.21618

Abstract

The effects of biochar as soil ameliorants depend on their characteristics that are influenced by the variation in biomass origin and pyrolysis process. In this context, the objective of this study was to determine the chemical and physical characteristics of seven biochar derived from different biomass wastes - rice husk, corn cob, empty oil palm fruit bunch, bagasse, and sawdust of albazia (Albizzia falcataria), maesopsis (Maesopsis eminii), and mahogany (Swietenia macrophylla) at two low-pyrolysis temperatures (250 and 350 oC). The results showed that the percentage of biochar yield decreased at higher temperature level. However, the increased thermal decomposition of plant biomass wastes (at 350 oC) resulted in higher pH, as well as ash, C, N content of the biochar; but it did not significantly affect nutrient availability. Biochar from wood waste had more C and Ca content. Biochar from rice husk produced the highest ash content, while biochar from empty oil palm fruit bunch yielded the highest pH value, and possessed more nutrients than all the others.  Increasing pyrolysis temperature from 250 to 350 oC resulted in greater biochar surface area and total pore volume but produced smaller average pore radius.
The Role of Terraced Paddy Fields and Its Critical Issues in Sustaining a Mountainous Tropical Monsoon Rural Community: Case Study of Malasari Village, Bogor Regency, Indonesia Kenta Tsuchiya; Ernan Rustiadi; Darmawan; Shinya Funakawa
Journal of Regional and Rural Development Planning (Jurnal Perencanaan Pembangunan Wilayah dan Perdesaan) Vol. 5 No. 2 (2021): Journal of Regional and Rural Development Planning (Jurnal Perencanaan Pembangu
Publisher : P4W LPPM IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jp2wd.2021.5.2.91-100

Abstract

Terraced paddy fields play an important role not only in the food production function, but also in flooding control, water source recharge, and soil erosion and landslide prevention in mountainous area. Abandonment has been occurring in many countries due to natural condition climate, low-productive, less economic condition, depopulation, aging, and poor work efficiency. However, the terraced fields in Malasari village, Bogor Regency are relatively sustained and constantly maintained by traditional local farmers. Therefore, this study aims to seek keys to how to maintain of the terraced paddy fields by local farmers in Malasari village. The survey was conducted from October 2019 to January 2020 on Malasari village (6°40’S and 106°31’E) by using primary and secondary data with a sample of 28 households. Questionnaire survey was conducted to elicit primary data on farmer’s basic information. Verification of land cover in Malasari village was carried out by visual interpretation land cover in images obtained from drone image in 2019. The terraced paddy fields have been maintained by local farmers contentiously. Two factors are discovered maintained the terraced paddy fields, namely: (1) the local wisdom technique is an act that has direct influences on the physical structure of terraced paddy fields for maintaining, especially land management which is plowing and making levee are playing an important role, and (2) social capital is an act that has indirect influences on the terraced paddy fields. These factors interact with each other to maintain the terraced paddy fields.
Co-Authors Apong Sandrawati Baba Barus Boedi Tjahjono Budi Mulyanto Cahyana, Destika Destika Cahyana Dyah Tj. Suryaningtyas Dyah Tjahyandari Dyah Tjahyandari Suryaningtyas Ernan Rustiadi Gunawan Djadjakirana Gunawan Djajakirana Gusti Z. Anshari Iis Rismawati Iskandar Iskandar Juniska Muria Sariningpuri Kenta Tsuchiya Muhaimin Muhaimin Muhammad Giri Wibisono Nur Izza Faiqotul Himmah Nuri Nursjahbani Nuriman, Muhammad Omo Rusdiana Permana, Mirza Rosalina, Febrianti Santun R.P Sitorus Santun Risma Pandopatan Sitorus Septi Nurul Aini Septiana, Liska Mutiara Shinya Funakawa Sudarsono Sudarsono Yiyi Sulaeman