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All Journal Journal of Tropical Soils Jurnal Ilmu-Ilmu Pertanian Indonesia TERRA : Journal of Land Restoration
Priyono Prawito
University of Bengkulu
Agriculture, Biological Sciences & Forestry Environmental Science

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KESESUAIAN LAHAN DAN EVALUASI RUMUS BRAAK UNTUK PENGEMBANGAN TANAMAN KENTANG DI KAKI BUKIT KABA BENGKULU Priyono Prawito; Eka Susiani
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 9, No 2 (2007)
Publisher : Program Studi Ilmu Tanah Fakultas Pertanian UNIB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.9.2.94-102

Abstract

In order to get optimal growth and production, potato (Solanum tuberosum) should be cultivated on suitable land. Principally, land suitability evaluation is fitting land quality with plant growth requirement. The purposesof this study were: (1) to evaluate land suitability for potato cultivation in Bukit Kaba Foot Slope Bengkulu (BKFSB), and (2) to determine the air temperature gradient for Braak equation in calculating air temperature. Landsuitability evaluation has been conducted by overlying the land characteristic map with the potato growth requirement, to produce land suitability classes with various restriction factors. Temperature gradient was calculated by plotting elevation and air temperature data from 3 weather stations into the Braak equation. Land suitability evaluation with area study of 48.410 ha showed that actual area S (marginally suitable with restriction factor of air temperature 20-23 oC) is 5,150.00 ha (10.63%); S 3ts 3t (marginally suitable with restriction factor of air temperature 20-23 oC and slope of 8-15%) is 1.727,50 ha (3.56%); N (not suitable at present with restriction factor of slope 15-25%) is 2,250.00 ha (4.67%); and N2 1s (permanently not suitable with restriction factor of air temperature >23 oC, slope >25%, and protected forest) is 39.282,50 ha (81.14%). The potential area S is 9,127.50 ha (18.86%) and N2 3t  is 39,282.50 ha (81.14%). To extend potato cultivation area in BKFB, new potato cultivars suitable for this area should be selected, and enhancing cultivation system with terrasering especially in slopping land as well ascontour planting should be done. The air temperature gradient in BKFSB area was 0.29 C each 100 m-elevation increase from sea level (0.29 oC hm-1).
Prediction of Erosion and Sedimentation in Micro Catchment Area of Air Lanang Using Soil and Water Assessment Tool (SWAT) Model Teja Alta Putra; Kanang Setyo Hindarto; Priyono Prawito
TERRA : Journal of Land Restoration Vol 5, No 1 (2022)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/terra.5.1.27-37

Abstract

This research aims to obtain erosion and sedimentation rate data in the micro catchment area of Air Lanang using soil and water assessment tool (SWAT) modelling within existing and scenario land uses. Geographically, the study area is located between latitude 3°26`23.48” - 3°31`46.09” S and longitude 102°24`11.74” - 102°28`26.35” E with a total area of 2987.06 ha. Soil analysis was conducted in the Soil Science Laboratory, Faculty of Agriculture, University of Bengkulu. The research data was analysed using SWAT model. Recorded data in this study were including soil analysis data, soil type map from land unit and soil map book Bengkulu sheet (0912) Sumatra, data of status area from KLHK, Digital Elevation Model National data from BIG, a set of climate data from BMKG, data of administrative border from RBI map Bengkulu Province and data of land use from the interpretation of satellite image and ground checking, as well as the scenario land use which was prepared following the community forest program from the government in the protected forest by converting the coffee plantation located within the protected forest area to woody plants with economic, social and conservative values. The results showed total erosion in the micro catchment area of Air Lanang with the existing land use in 2020 was 820731.87 ton year-1, while in the scenario land use was 288212.45 ton/year which were classified to very light, light, moderate, heavy and very heavy in class erosion. Based on the existing land use data, there was a decrease of erosion in the moderate to very heavy class of erosion for 7.27 % resulting in the very light and light class of erosion become 15.55 % after the simulation of the scenario land use model. The use of scenario land use model is effective to decrease erosion and sedimentation rate. The total sedimentation in the micro catchment area of Air Lanang in existing land use in 2020 was 354949.98 ton year-1 with the highest sedimentation in sub-basin 2 while the lowest sedimentation was found in sub-basin 12. On the other hand, the total sedimentation in the scenario land use model was 137365.04 ton year-1. The reduction of total sedimentation in existing land use in 2020 to the scenario land use model was 36.76 %. 
Model of the Relationship Between Selected Soil Physical Properties of Oil Palm Soil Bandi Hermawan; Elsa Lolita Putri; Wanda Afrilia Utami; Priyono Prawito
JOURNAL OF TROPICAL SOILS Vol. 31 No. 1: January 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i1.35-43

Abstract

Soil, water, and plants are interrelated elements in agricultural production. An in-depth understanding of the characteristics and interactions of these three aspects is essential in effective agricultural system management. The study aims to examine the relationship between soil’s water-holding capacity and different land-slope levels and to identify the physical soil characteristics that affect it. The research was conducted in a community oil palm plantation in Talang Tengah I Village, Pondok Kubang District, Central Bengkulu Regency, Bengkulu Province. The method used was a survey with purposive sampling across five slope levels: flat (0-8%), sloping (8-15%), slightly steep (15-25%), steep (25-45%), and very steep (45-100%). The data were statistically analyzed using Partial Least Squares Structural Equation Modelling (PLS-SEM) with WarpPLS 7.0. The results showed that slope had a significant effect on various soil physical characteristics and soil water holding capacity. The steeper the slope, the greater the decrease in soil permeability, total pore space, and soil organic carbon, and the greater the increase in soil volume weight, which results in a decrease in soil water holding capacity. The resulting model shows agreement in describing the relationships between variables: slope affects organic matter, sand %, and permeability, and volume weight affects total pore space and permeability, which in turn affects the soil’s capacity to hold water.
Co-Authors Bandi Hermawan Eka Susiani Kanang Setyo Hindarto Putri, Elsa Lolita Teja Alta Putra Wanda Afrilia Utami