Garuda - Garba Rujukan Digital

Variable Charge of Ultisols due to Phosphate Application and Incubation Time Muhammad Mahbub
JOURNAL OF TROPICAL SOILS Vol 15, No 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.103-109

Variable Charge Ultisols due to Phosphate Application and Incubation Time (M Mahbub): The laboratory experiment was conducted to study the effect of phosphate (P) application and its incubation time on pHo (pH at the point of zero charge) and variable charge of ultisols . The determined parameters were pHo and variable surface-charges. Soil samples were added by 0, 375 and 1,125 mg P kg-1 (or 0, 50 and 150% of the P sorption maximum, respectively). Then, they were incubated for 2, 4, 6 and 8 weeks. The variable surface-charges and pHo were determined by using the activity of potential determining ions (H+ and OH-) within two salt concentrations as counter ions (0.1N and 0.001N CaCl2) through a potentiometric titration method. The results were indicated that the high P sorption and 766 mg P kg-1 in maximum sorption were due to high contents in clay fractions and aluminum as well as low pH of experimental soil. Application of P and incubation time were able to decrease pHo and to increase negative surface-charges. Additionals of 375 and 1,125 mg P kg-1 incubated for 8 weeks gave the value of pHo 2.86 and 2.69; as well as the magnitude of negative charges 14.48 and 16.76 cmol(-).kg-1, respectively (both for 0.001N CaCl2). For pH > pHo (the characteristic of variable charge soils), the higher the salt (CaCl2) concentration and pH solution, the higher the negative surface-charge.

Status Kesuburan Tanah Pada Daerah Pertanaman Hortikultura di Kecamatan Landasan Ulin dan Liang Anggang Kota Banjarbaru Ekka Rindha Setyanie; Muhammad Mahbub; Mariana Mariana
Agroekotek View Vol 2, No 1 (2019)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/agtview.v2i1.711

Intensive land use in agriculture will lead to decreased soil fertility, there fore is a need to maintain soil fertility and productivity. This study lead is to determine the status of soil fertility in horticultural cultivation area in Landasan Ulin and Liang Anggang district of Banjarbaru city. Use study due by purposive sampling method and soil chemical analysis. The implementation of the research consisted of the preparation stage of the field survey to determine the location of the sampling, and selected 10 point location of soil sampling. The implementation stage included sampling and soil chemical analysis in the laboratory consisting of 5 chemical parameters is Cation Exchange Capacity (CEC) and Basic Saturation (BS) with extraction using 1N NH4OAc pH 7 , P-total and K-total with extraction using 25% HCl, C-organik with modified Walkey-Black method used for determine of soil fertility status. The result showed that soil fertility status at the research sites was classified as low soil fertility status criteria, due to the main limiting factor is low CEC value with average value of 15,27 me/100g and with sandy loam texture class up to sand.

Pengaruh Kompos Jerami Padi terhadap Kelarutan Ferro (Fe2+) dan pH Tanah Serta Pertumbuhan Tanaman Padi Ciherang di Tanah Sulfat Masam Muhammad Suriani; Muhammad Mahbub; Rodinah Rodinah
Agroekotek View Vol 3, No 1 (2020)
Publisher : Universitas Lambung Mangkurat

One type of land in a swamp ecosystem that has a lot of complexity is acid sulfate soils. One of the factors that can improve the condition of this soil is the use of organic material which functions to maintain soil redox and can chelate Fe2+. The purpose of this research was to know the effect of rice straw compost on ferro-iron solubility, soil pH, and rice growth so it obtained the appropriate treatment of the dose of rice straw compost. Soil sampling of acid sulfate soil was collected in Jejangkit District, South Kalimantan. This research was conducted in the greenhouse of Agroecotechnology Study Program and set up with a completely randomized design with a single factor. The treatments were K0: control, K1: soil + straw compost 2,5 t ha-1, K2: soil + straw compost 5,0 t ha-1, K3: soil + straw compost 7,5 t ha-1, K4: soil + straw 10,0 t ha-1, with 3 replications. The results showed that the dose of straw compost treatments was not significantly affected on Fe2+ iron solubility, number of tiller, wet and dry weight of rice plant, but showed a significant on soil pH. The best treatment of rice straw compost is in the treatment with 5 t ha-1 of dose because it can increase the highest pH of 3,72 and can reduce Fe2+ content to 54,82 mg kg-1. Tiller number, wet weight, and dry weight of rice plants were not significantly different because the plant runs into a limitation of growing.

Sustainable Land Management Supports Organic Farming in Tidal Swamp Area of South Kalimantan: Water Quality Zuraida Titin Mariana; Muhammad Mahbub; Afiah Hayati
Journal of Wetlands Environmental Management Vol 3, No 2 (2015): July-December
Publisher : Center for Journal Management and Publication

Development of organic farming in tidal land should be wise and considers all aspects supporting the development of sustainable agriculture. The aim of this research was to quantify concentration of metals contained in tidal swamp water both at the single and double tides of various tidal typologies, including Pb, Cd, Cr, and Fe ions. The research was conducted in four villages in Barito Kuala regency (South Kalimantan) to represent tidal land types A, B, C and D, respectively. Sampling was carried out at spring and neap tides in each villages and the Barito river nearest to the villages. The water samples were collected in plastic bottles in the irrigation canals and brought to the laboratory for analysis of Pb, Cd, Cr and Fe concentrations.Â The results showed that the Pb, Cd, Cr and Fe concentrations in studied area were <0.002 - 0.0122 ppm, 0.0067 - 0.0122 ppm, <0.002 - 0.0064 ppm and 0.0358 ppm - 9.0807 ppm for Pb, Cd, Cr and Fe, respectively. Based on he limiting factor in heavy metals of water quality for agricultural crops in land C and D type are cadmium (Cd) and iron (Fe) elements. Acidity of water on the land types C (pH 2.72 - 2.95) and D (pH 2.68 - 4.41) were lower than those in the land types A (pH 6.01 - 6.83) and B (pH 3.6 - 6.29).

Pengaruh Pemberian Biourin Sapi terhadap Pertumbuhan dan Produksi Tanaman Kangkung Darat (Ipomoea reptans Poir) pada Tanah Ultisol Maya Pahlawati; Muhammad Mahbub; Muhammad Syarbini
Acta Solum Vol 1 No 1 (2022): November 2022
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v1i1.1383

Ultisols have the potential to be developed as productive agricultural land, but need several efforts by means of organic matter and fertilizer applications. Biourine is a fermented liquid waste from cow urine. One of the commodities developed in Ultisol is spinach (Ipomoea reptans Poir). The study aims to determine the effect of treatments of six biourin concentrations on available nitrogen, soil pH, and growth plants of spinach on Ultisol soil. The single factor of completely randomized design (CRD) used as an experimental design consists of six treatments with four replications (24 experimental units). The results showed that biourine had no effect on increasing soil ammonium-N and had no effect on soil nitrate-N and soil pH. Biourin affects the increase in wet weight and dry weight of spinach plants. There is a relationship between soil NO3- and NH4+ levels with wet weight. Biourin concentration level of 2% is the best concentration to increase ammonium-N, wet weight and dry weight.

Pengaruh Ukuran Butir Kapur Berbeda terhadap pH, Fe-larut dan Al-tukar Tanah pada Lahan Pasang Surut Akhmad Fauzi; Muhammad Mahbub; Syaifuddin Syaifuddin
Acta Solum Vol 1 No 2 (2023): Maret 2023
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v1i2.1810

Swampland in Indonesia covers an area of 34.93 million ha spread over various islands such as Sumatra, Java, Kalimantan, Sulawesi, and Papua. One type of swamp land that is often used in agriculture is tidal lands. The problems faced in the development of tidal lands for agriculture include acidic soil pH, high levels of soluble Fe and Al. One of the efforts to overcome the problem of acidic soil pH, high levels of soluble Fe and Al-dd is liming. The finer grain level of lime may increase the effectiveness of liming. The purpose of this study was to quantify the effect of lime grain sizes on changes in pH, dissolved Fe, and exchangeable Al of tidal lands. This study employed a one-factor completely randomized design (CRD) consisting of 6 treatments (Control; CaCO3 more than 1.00 mm (> 18 mesh); CaCO3 lime, 0.5-100 mm (18 -35mesh); CaCO3 measuring 0.21-0.50 mm (35-70 mesh); CaCO3 measuring 0.21 mm (<70 mesh); CaCO3 lime measuring 0.15-1.00 mm (18 -100 mesh)). The results showed that the difference in the size of the CaCO3 lime granules had a significant effect on changes in pH, soluble Fe and exchangeable Al. The application of CaCO3 lime granules 0.21 mm (<70 mesh) result in increases in soil pH and suppress soluble Fe and exchangeable Al.

Fluktuasi Genangan Air dan Pemberian Campuran Kapur dan Kompos Jerami Padi: Pengaruhnya terhadap pH dan Fe Larut pada Tanah Sulfat Masam Fajar Prayoga; Muhammad Mahbub; Afiah Hayati
Acta Solum Vol 2 No 1 (2023): November 2023
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v2i1.2274

Swamps in Indonesia are widely spread over four major islands, namely in Sumatra, Kalimantan, Papua, and Sulawesi Papua. The problem with acid-sulfate soils is when the pyrite layer is oxidized. This study used a two-factorial with completly randomized design (CRD). The first factor was flooding fluctuation an the second factor was lime with straw compost. The soil parameters tested were pH and soluble Fe. Observations in the second week of the treatment of fluctuations in puddles that were drained, then flooded and added with a mixture of 3 t ha-1 lime, and 2.5 t ha-1 of straw compos resulted in the highest pH of 6.21. The best soil pH was given lime at 3 t ha-1, both flooded and drained. Observations in the fourth week produced the highest pH, namely 4.80. The pH value of the slightly acidic soil was due to an oxidation-reduction process. The 2nd week of observation had the highest soluble Fe value of 221 mg kg1, which was due to the analysis of soluble Fe using a pH of 4.8 so that Fe2+ increased in dissolved Fe. The fourth week of observation had the lowest soluble Fe value of 56.34 mg kg-1. This was due to flooding and the application of a mixture of lime and rice straw compost. The results of the study show that the interaction of fluctuations in water, lime, and rice straw compost that can affect soil pH and the solubility of soil soluble iron (Fe2+).

Pengaruh Ukuran Butiran Kapur Pertanian yang Diberikan Berdasarkan Sulfat Larut terhadap Peningkatan pH Tanah Sulfat Masam Ramzy Nurul Afiat; Muhammad Mahbub; Zuraida Titin Mariana
Acta Solum Vol 1 No 3 (2023): Juli 2023
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v1i3.2281

Acid sulfate soils contain pyrite and when pyrite is oxidized it causes the soil pH to decrease. Application of agricultural lime CaCO3 is needed to raise soil pH. The grain size of lime greatly affects the fast, slow, and persistent increase in soil pH. This research method used a completely randomized design (CRD) with a single factor, namely the grain size of agricultural lime (18-35 mesh, 18-70 mesh, <18 mesh, 35-70 mesh, <35 mesh, <70 mesh). The treatment was repeated 4 times. The dose of lime given is based on the value of the bulk density of the soil and the sulfur of the soil solution. Observation of soil pH was carried out after an incubation period of 4 weeks using glass electrodes with various ratios of soil and water (1:2.5; 1:5; 1:7.5; 1:10). The results showed that the grain size of lime affects the increase in pH of acid sulfate soil in the soil-water ratio measurement method of 1:5 and 1:10, except for the measurement method 1:2.5 and 1:7.5. The smaller the lime size, the greater the increase in pH of acid sulfate soil. The largest increase in soil pH in the soil-water ratio measurement method was 1:10, for each grain size from the largest to the smallest: 18 - 35 mesh, 18 - 70 mesh, <18 mesh, 35 - 70 mesh, <35 mesh and <70 mesh, resulting in soil pH successively: pH 4.52; pH 4.58; pH 4.53; pH 4.60 ; pH 4.63 and pH 4.70.

Sebaran Tingkat Kemasaman Tanah dan Potensial Redoks serta Kedalaman Pirit (FeS2) pada Lahan Sulfat Masam di Kecamatan Alalak Fandi Khairany Ahmad; Muhammad Mahbub; Abdul Hadi
Acta Solum Vol 2 No 2 (2024): Maret 2024
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v2i2.2437

Acid sulfate soil has a layer of pyrite, when it is oxidized, can acidify the soil. The presence of pyrite in acid sulfate soils is very diverse and must be known. Not knowing the depth of pyrite can have fatal consequences, because layers of pyrite can be lifted to the surface due to tillage so that it oxidizes. This study aims to determine and map the distribution of pyrite depth, soil pH, and redox potential. Soil samples were determined with an exploratory descriptive method through land surveys and supported by laboratory analysis of pH, Eh and FeS2. The results showed that acidity of acid sulphate soil at all sample points was classified as very acid, Eh was classified as low reduction till oxidation. Based on the results of observations of pyrite depth, 3,492.15 ha (78.1%) was actual acid sulfate soil and 979.13 ha (21.9) was potential acid sulfate soil. So proper management is needed when turning over the soil so that the pyrite is not exposed, applying lime, organic material and regulating the water level so that the groundwater level is not below the depth of the pyrite

Analisis Kandungan Hara N, P, dan K pada Perbedaan Lahan yang Ditanami Karet dan Kelapa Sawit Nur Hidayanti; Muhammad Mahbub; Abdul Haris
Acta Solum Vol 2 No 2 (2024): Maret 2024
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v2i2.2445

The general obstacles in cultivating rubber and oil palm are soil acidity and limited availability of nutrients, especially N, P, and K. These nutrients play an important role in the growth of rubber and oil palm plants. Knowing the nutrient content is necessary to be able to determine the management that needs to be carried out. The objective of this study is to determine differences in the nutrient content of N, P, and K on various lands planted with rubber and oil palm plants. Soil sample analysis was conducted in the laboratory for available N, available P, and available K. To determine differences in land use for the elements N, P and K, data were analyzed using an unpaired two sample t test. The results showed differences in available K and available P levels between the two land types, while no differences were observed in N availability between the two land types. This variation may be caused by differences in land management practices.

Title

Found 10 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 10 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 10 Documents
Search