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Dermiyati
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Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro No. 1, Bandarlampung 35145, Indonesia
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INDONESIA
Journal of Tropical Soils
Published by Universitas Lampung
ISSN : 0852257X     EISSN : 20866682     DOI : http://dx.doi.org/10.5400/jts.v25i1
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Journal of Tropical Soils (JTS) publishes all aspects in the original research of soil science (soil physic and soil conservation, soil mineralogy, soil chemistry and soil fertility, soil biology and soil biochemical, soil genesis and classification, land survey and land evaluation, land development and management environmental), and related subjects in which using soil from tropical areas.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Konservasi Alam dan Lahan
Articles 817 Documents
 32   33   34   35   36 
Effectiveness of Bio-organic Fertilizer Formulas to Increase Productivity of Upland Rice and Dehydrogenase Activity in Lampung Acid Upland . Surono; Edi Santosa; . Subowo; . Elsanti; . Khamdanah
JOURNAL OF TROPICAL SOILS Vol 20, No 2: May 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i2.85-93

Abstract

Development of acid upland in Indonesia still has constraints. To solve the constraint, environmental friendly technology by using organic matter and beneficial microbes is necessary. This study aimed to determine the effectiveness of bio-organic fertilizer formulas for increasing productivity of upland rice plant in acid upland. This study used a randomized block design with 11 treatments using un-treatment as a control and some combination of NPK and bio-organic fertilizer. Each treatment was repeated three times, the size of plot was 5 m x 5 m. Upland rice var. Situ Patenggang was used as a plant indicator, with cultivication spacing of 40 cm x 15 cm. Combination treatment of NPK and bio-organic fertilizer increased population of P-solubilizer and N-fixer bacteria, plant height and tillers. Treatments of NPK-rec, ¾ NPK-rec and combination of ½ NPK-rec, ¾ NPK-rec and NPK-rec with both bio-organic formulas gave the weight of dried unhusked upland rice equal was 1.92 to 2.56 t ha-1 significantly higher compared to the control. The highest RAE was generated by treatment of NPK-rec combined with Bio-Organic Formula II about 137%. Bio-Organic Formula II could increase the growth and productivity of upland rice var. Situ Patenggang and could increase the efficiency udeof ½ NPK fertilizer dosage recommendations or equivalent with 125 kg urea, SP-36 100 kg, and 35 kg KCl ha-1 and increased the dehydrogenase activity.
Loss of Soil Organic Matter, Lignocellulose and Microbial Population in Oil Palm Plantations Located at Different Slopes Rika Andriati Sukma Dewi; Lilik Tri Indriyati; Bandung Sahari; Supiandi Sabiham
JOURNAL OF TROPICAL SOILS Vol 22, No 3: September 2017
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2017.v22i3.175-181

Abstract

Loss of soil organic matter can be caused by erosion triggered by soil compaction and high rainfall. The aims of  the study were to determine (1) the loss of soil organic matter, lignocellulose, and soil microbial population due to erosion and (2) the contribution of organic matter from oil palm fronds. In the current study, the erosion plots were built on the accessible inter-row (gawangan hidup) and inaccessible inter-row (gawangan mati) of oil palm plantations located at the slope of 6-10% and >10%. Soil organic matter, lignin, cellulose, and hemicellulose contents and total soil microbial populations were measured in the sediments collected from the erosion plots. The results showed that the loss of organic matter was higher in the accessible inter-row than that in the inaccessible inter-row. The addition of lignin, cellulose, and hemicellulose from oil palm fronds into the soil are 2.06 Mg ha-1 yr-1, 1.13 Mg ha-1 yr-1 and 1.02 Mg ha-1 yr-1, respectively. Total bacterial population in the sediments taken from the accessible inter-row was higher than that from the inaccessible inter-row, while the total fungal population in the sediments from the inaccessible inter-row was higher than that from the accessible inter-row.  
Phosphate Adsorption Capacity and Organic Matter Effect on Dynamics of P Availability in Upland Ultisol and Lowland Inceptisol . Marsi; . Sabaruddin
JOURNAL OF TROPICAL SOILS Vol 16, No 2: May 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i2.107-114

Abstract

Ultisols and Inceptisols were used to investigate the adsorption-desorption capacity of P and the effect of organic matter on the dynamics of P availability in tropical acid soils. The experiment consisted of two sub-experiments. Sub-experiment I was to study the adsorption-desorption capacity of Ultisols, Fresh-water lowland Inceptisols, and tidal-swamp Inceptisols. Therefore, surface soils (0 to 30 cm) of each tested soil were treated with 0, 10, 20, 30, 40, 60, 80, 100, 120, 140, 170, and 200 mg P kg-1 of soil. Sub-experiment II was to study the effects of organic matterapplication (0, 5, 10, and 15 Mg ha-1) on the dynamics of available P following 60d incubation under room temperature.P fertilizer application significantly affected water soluble-P (WSP) (p<0.01) and soil available P-Bray and Kurtz No. 1 (BKP) (p<0.01) in the three tested soils. The different response of both WSP and BKP confirmed that the soils tested in the current experiment had different soil P buffering capacity in the order of Tidal-lowlandInceptisol>Upland Ultisol>fresh-water Lowland Inceptisol. OM application increased the BKP in all tested soils as compared to the control. Differences in pattern of soil available P dynamics over time were detected between upland soil and two lowland soils used in the current experiment.Keywords: Adsorption-desorption, Inceptisols, organic matter, Ultisols
Pertumbuhan dan Hasil Jagung yang Dipupuk N, P, dan K pada Tanah Vertisol Isimu Utara Kabupaten Gorontalo . Nurdin; Purnamaningsuh Maspeke; Zulzain Ilahude; Fauzan Zakaria
JOURNAL OF TROPICAL SOILS Vol 14, No 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.49-56

Abstract

The fertilizer availability as source of N, P, and K nutrient where plant responsif  was difficult found by farmer. Thefore, It was needed information about nutrient availability in soil properties to know nutrient deficiency of its by maize as plant indicator. The  objective of this research was to study the respons of  N, P, and K fertilizers and the best combination of it on the growth and yield of Maize. The research conducted at Udic Pellusterts in North Isimu Tibawa District of Gorontalo Regency. The experi- mental design was following random block design that consist of 5 treatments with 3 replications. The result of this research showing that minus N, P, and K fertilizers have a significantly effect on plant age polination, the percentage of height stem of  an ear of corn to plant height and dry straw weight but did not have significantly effect on plant height and the weigh of one hundred grain of Maize. To improve the growth and yield of Maize using fertilizing without P treatment were 250 kg Urea ha-1 and 75 kg KCl ha-1 or completely dosage were 250 kg Urea ha-1, 100 kg TSP ha-1 and 75 kg KCl ha-1 as the best fertilizers combination.
Effect of Pottery Irrigation and Mulching on Melon (Cucumis melo) Growth and Soil Properties of Alfisol and Entisol Rahayu Rahayu; komariah komariah; Mei Pujiyarti
JOURNAL OF TROPICAL SOILS Vol 27, No 3: September 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i3.99-109

Abstract

The water supply in dry land depends on the rainfall, which causes agricultural constraints and limited water supply. The pottery irrigation method is considered capable of overcoming water shortages during the dry season. Pottery irrigation uses porous clay, so the water slowly comes out of the pottery and wet the surrounding soil. The research aimed to study the influence of pottery subsurface irrigation with and without mulching on watermelon growth and soil properties of clayey soil Alfisol and sandy soil entisol. The research was conducted on July 2019 in the experimental field Faculty of Agriculture, Karanganyar Regency. The experimental research design used a nested design with a 3-factor treatment that were soil type (T), fertilization method (P), and use of mulch (M). The types of soil were Alfisol (T1) and Entisol (T2). The fertilization methods were fertigation 100% (P1), fertigation 50% (P2), and banding fertilization 100% (P3). Mulch application included control, without mulch (M0) and mulch (M1). The combination of P1M1 treatment on alfisol and entisol soil showed the highest soil moisture with values of 23.1% and 22.5%, respectively. The highest fruit weight of melon in alfisol and entisol soils were indicated by the same treatment (P1M1) with values of 580.33 g and 616.5 g, respectively.
Effect of Mulch and Strengthened Terrace Strips on Erosion, Sediment Enrichment Ratio, and Nutrient Loss Through Erosion Jaka Suyana; Nugraheni Nugraheni
JOURNAL OF TROPICAL SOILS Vol 27, No 3: September 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i3.133-145

Abstract

Mulching technology is accessible to farmers and can also reduce soil erosion and nutrient loss through erosion. This research aimed to observe the effectiveness of the combination treatment of strengthened terrace strips and maize stalk mulch on runoff, erosion, sediment enrichment ratio (SER), and nutrient loss through erosion. The experiment was conducted on upland farming on Andisol at the end of the rainy season. The erosion plot experiment was arranged in a Randomized Block Design (RBD) with the treatment of 4 doses of maize stalks mulch (0, 4, 8, and 12 Mg ha-1) and three types of strengthened terrace strips (Jali, Vetiver, and Kalanjana grass) put in groups/blocks, giving 12 experiments. The combination treatment of maize stalk mulch and strengthened terrace strips has not significantly reduced runoff and soil loss. The treatment mulch dose of 12 Mg  ha-1 reduced runoff and soil loss by 9.9% and 21.9% compared to without mulch. The application of maize stalks mulch tends to reduce the sediment concentration and the number of nutrients (N and Organic C) lost through erosion but increases the nutrient concentration in sediments (SER value).
Land Suitability Evaluation on Pepper Plant in Bireuen Regency, Aceh Province yusra yusra yusra; Muliana Muliana; Khusrizal Khusrizal; Dewi Sartika Aryani
JOURNAL OF TROPICAL SOILS Vol 27, No 3: September 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i3.147-156

Abstract

Pepper plant development requires data and information on land potential and land suitability class assessment based on the physical and chemical properties criteria so that the land can be productive. The study aimed to determine the land suitability class for pepper plants in Bireuen Regency. The research was conducted in Bireuen Regency. The unit land map (Satuan Peta Lahan, SPL) resulting from the overlay of the slope map, land use map, and soil type map was used in this study. The method used is a survey method with a land unit approach consisting of four stages: (1) preparation stage, (2) preliminary survey, (3) main survey, and (4) presentation of results. The results showed that the land had good to poor drainage, soil depth >75 cm, flat to steep slopes, mild to very heavy erosion hazard, dusty clay texture, low to high cation exchange capacity (CEC), slightly acidic to slightly alkaline pH, low organic C, Base Saturation (BS) is low to high, N total is low to very low, P2O5 is very low, and K2O is very low. Land suitability class for pepper plants in Bireuen Regency includes marginal suitability (S3) with limiting factors in the form of drainage, texture, CEC, BS, N-total, P2O5, K2O, slope, and erosion hazard. Improvements include making rorak, planting contours, drainage systems, applying manure or compost, and planting cover crops.
Study of Coffee Crops Development in Rantau Pulut Village, Seruyan Regency Central Kalimantan Rabiatul Wahdah; Ratnah Taher; Muhammad Syarbini; Kamilia Wilda; Abdul Haris
JOURNAL OF TROPICAL SOILS Vol 28, No 1: January 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i1.23-29

Abstract

Coffee is one of Indonesia’s most prominent agricultural commodities; various coffee plants are produced with the best results from the west to the east of Indonesia. Indonesia’s climate and geographical location are suitable for cultivating the coffee plant. This study aims to determine the level of land suitability and the limiting factors for the development of coffee plants, as well as provide direction/recommendations in the development of coffee plants in Rantau Pulut Village, Seruyan Regency, Central Kalimantan. Land suitability has the potential to be increased from S2 to S1 by managing the limiting factors for the number of dry months and rainfall, SB (Saturated Base), pH, P2O5, and K2O so that the potential land suitability for the study area is S2r. The method used in this study is a qualitative descriptive survey method with a matching system, namely matching land quality/land characteristics with land use requirements for agricultural commodities to be developed. The result of the actual land suitability analysis of Rantau Pulut Village for developing robusta coffee plants is S3fn
Using Geostatistics for Spatial Analysis of Soil Moisture Content, Electrical Conductivity, and pH at Paddy Fields Yagus Wijayanto; Muhammad Aldian Dwi Kustianto; Subhan Arif Budiman; Ika Purnamasari
JOURNAL OF TROPICAL SOILS Vol 28, No 2: May 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i2.47-56

Abstract

Soil is dynamic due to various internal and external processes exerted on the soil, resulting in unique soil characteristics in space in short and long distances. Geostatistics (kriging) is the method of quantifying the spatial variation of soil properties. This research was mainly aimed at applying geostatistics to quantify and interpolate the spatial dependence and structure of three soil properties, namely pH, EC, and Soil Moisture Content (SMC) in a small area. This research was conducted on paddy fields in Mlandingan Kulon Village, Situbondo Regency. Sampling was conducted on an area of   9.2 ha with 31 sample points. Normal data distribution was found for pH and EC, whereas this was not the case for SMC. The results of the analysis showed that most of the pH values   were alkaline (>8), EC values were non-saline (<2 mm/cm), and SMC was in the low category (<20%). The results show that for three soil properties, weak dependencies were observed. The values of Root Mean Square Error (RMSE)  confirmed that kriging with exponential was better compared to the spherical model, resulting in the RMSE of 0.546 (pH), 0.041 (EC), and 1.512 (SMC).
Application of Biocom-Phosphate Solubilizing Fungi and Coal Fly-Ash to Increase P-Availability of Peat Soil in Kalimantan Gusti Irya Ichriani; Hairil Ifansyah; Agus Maulana; Ema Rizki Fauwziah; Muhammad Syifa; Bambang Supriyono Lautt; Adi Jaya; Hastin Ernawati Nur Chusnul Chotimah; Wiranda Pasaribu
JOURNAL OF TROPICAL SOILS Vol 27, No 3: September 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i3.111-119

Abstract

The peatlands have the potential to support food security efforts. However, there is have constraints on soil fertility, especially the P nutrients availability. The biotechnology approach, the application of ameliorant (biochar-compost carrier medium (biocom)) enriched with phosphate solubilizing fungi (PSF) and coal fly ash (CFA), was expected to increase the P-availability in peat soils. The research aimed to study the application of biocom enriched with PSF and CFA to increase soil P-availability and plant P-uptake. The study was conducted using peat soil media with the formulation of CFA and biocom enriched with PSF and CFA as treatments. The treatment effect was observed through soil P available and plant P uptake of maize. The results showed PSF application was inconsistent in improving P available in peat soils in Kalimantan. In Central Kalimantan, Biocom + PSF was able to increase P available in peat soils by up to 406.18% (A. oryzae-Tb7) and 353.44% (N. fischeri-Tm8). However, in South Kalimantan P available in peat soil was only 8.04% (A. oryzae-Tb7) and 12.86% (N. fischeri-Tm8). The CFA+ (biocom+PSF) formulation increased P available in Central Kalimantan peat soils, but it was different from South Kalimantan peat soils. The application of biocom+PSF and CFA has not been able to increase the P uptake of maize plant in peatlands of South Kalimantan.

Page 34 of 82 | Total Record : 817

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