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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science BUANA SAINS
Wani Hadi Utomo
FAKULTAS PERTANIAN UNIVERSITAS BRAWIJAYA
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science Mathematics Physics

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PENGARUH RESIDU BICOHAR TONGKOL JAGUNG DIPERKAYA AMONIUM SULFAT TERHADAP BEBERAPA SIFAT TANAH DAN PERTUMBUHAN TANAMAN JAGUNG MANIS DI pH TANAH YANG BERBEDA Exclesia Ansila Sitohang; Wani Hadi Utomo
Jurnal Tanah dan Sumberdaya Lahan Vol. 5 No. 1 (2018)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.937 KB)

Abstract

Biochar is one of amandement soil that comes from imperfectly combustion (pyrolysis) form of natural charcoal. The addition of biochar as a soil reparing was able to increase the carbon in the soil that able to improve soil characteristic soil. The purpose of this study was to find out the influence of residual biochar enriched with amonium sulphate on soil chemical and physical properties, and plant growth on various soil acidity levels. Treatments tested for this study were biochar residues enriched by amonium sulfate, N fertilizer (BN), biochar residues (B), without biochar, N fertilizer (N), and control (K) and various degrees of soil pH, i.e. pH 6-7 (P1), pH 4-5 (P2), pH 5-6 (P3). Twelve treatments were arranged in a randomzed block design with three replicates. Variables observerd were properties of soils (pH, C-Organic, CEC, N-total, and aggregate stability), and maize growth parameters (plant height and the number of leaves). The results showed that aplication of biochar of residues maize cob enriched with amonium sulfphate and various pH soil had interactions towards soil CEC and soil N-total, and had an interactions towards plant growth at plant age of 8 weeks-10 weeks, and number of leaves at age 9 weeks-10 weeks.
KONSERVASI PANTAI LABUANGKALLO DENGAN METODE MEKANIK DAN VEGETATIF Idayati, Sri; Utomo, Wani Hadi
BUANA SAINS Vol 17, No 1 (2017)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v17i1.578

Abstract

Labuangkallo is a village in costal area, located on the bay of Apar, in the boundary of57 km2 national park. Based on the map of hydro oceanography (1980) and bathymetry measurements (2011), there has been changing of coastline during 31 years.It showed significant changes, especially in the protrusion showed abrasion of 4.9507 m / yr. In the review and direct observation, the issues are grouped into three (3) major parts: (a) Labuangkallo river estuary is getting narrow due to sedimentation; (b) Fishermen settlement was eroded by waves, and (c) mangrove forest was destroyed by abrasion. The source of obstruction is, there is magnitude of the waves from the northeast and east coast, and it abrades the land, especially in area of protrusion / headland. It made angled waves against the shoreline andthe wave forces shaping currents that carry sediment along the coast due to abrasion and deposited on the edge of the river Labuangkallo. The conseravation strategy is usingmechanical method is hard treadment by coastal protector constructionand HDPE sand bag materials, there of the vegetation method with soft treadment using mangrove vegetation along the coastal village. Both are considered the strategies forreclamation.
Effects of land cover, slope, and soil physical properties on runoff coefficient in Upper Brantas Sub-watershed Cahya, Utik Tri Wulan; Utomo, Wani Hadi; Nugroho, Waego Hadi; Suharyanto, Agus
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.8593

Abstract

Management of water resources in watersheds requires an in-depth understanding of the factors that influence the runoff coefficient. This study aimed to analyze the influence of land cover, slope, and soil physical properties on the runoff coefficient in the Upper Brantas Sub-watershed and develop a prediction model using multiple linear regression. The research was conducted in Pesanggrahan Village, Batu City, using nine observation plots consisting of three types of land cover (dense canopy, moderate canopy, and sparse canopy) with three slope classes (15%, 25%, and 35%). Surface runoff measurements were conducted using 150 m² plots during the rainy season. Pearson correlation analysis showed that the runoff coefficient was significantly negatively correlated with land cover percentage (r = -0.551; p<0.001) and Dry Microaggregate Ratio (DMR) index (r = -0.439; p<0.001), and significantly positively correlated with slope (r = 0.265; p<0.001) and sand content (r = 0.410; p<0.001). The selected regression model (C = -0.031 - 0.074X1 + 0.015X2 - 0.001X4 + 0.110X6) showed land cover/X1 had the strongest influence (? = -0.074, p<0.0001), followed by slope class/X2 (? = 0.015, p<0.0001), bulk density/X4 (? = 0.110, p<0.001), and silt content/X6 (? = -0.001, p<0.036). The model performed well with a validation R² of 46.3% and a Root Mean Square Error (RMSE) of 0.0331. This research presents a practical model for estimating runoff coefficients, supporting soil and water conservation planning in mountainous areas.
Co-Authors Adi Prasetyo Agus Suharyanto Bambang Siswanto Cahya, Utik Tri Wulan Carolina Eva Nita Eko Handayanto Endang Listyorini Exclesia Ansila Sitohang Hadi Yuananto Idayati, Sri Kiromil Abror Moh Harrys Pramudita Moh. Harrys Mohammad Bisri Raymond Valiant Ruth Saurmaria Malau SATRIYAS ILYAS Sugeng Prijono Sykehfani Sykehfani Waego Hadi Nugroho Waego Hadi Nugroho