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All Journal Jurnal Hortikultura Indonesia (JHI) Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Journal of Tropical Soils Jurnal Hortikultura Jurnal Penelitian Sains Agroekoteknologi Tropika Lembab Business Review and Case Studies Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Prosiding Seminar Nasional Biologi
Fahrizal Hazra
Departemen Ilmu Tanah Dan Sumberdaya Lahan, Fakultas Pertanian, Institut Pertanian Bogor, Jl. Meranti Kampus IPB Dramaga, Bogor 16680
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Mathematics Physics Social Sciences Veterinary

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Journal : Journal of Tropical Soils

 1 
Soil Chemical Characteristics of Organic and Conventional Agriculture Muhammad Abdul Aziz; Fahrizal Hazra; Selly Salma; Dedi Nursyamsi Nursyamsi
JOURNAL OF TROPICAL SOILS Vol 21, No 1: January 2016
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2016.v21i1.19-25

Abstract

Use of chemical fertilizers and pesticides on intensive land of both lowland and upland food crops have been shown to increase agricultural productivity significantly. Research aimed to study soil chemical characteristics and soil pesticide residues at some crops of organic and conventional farms. The research was carried out in  Laboratory of Soil Chemistry, Indonesian Soil Research Institute and in Laboratory of Agrochemical Residue, Indonesian Agricultural Environment Research Institute, Bogor from February to July 2015. Soil samples at 0-10 cm depth were taken compositely from broccoli (Brassica oleracea), carrots (Daucus carota), maize (Zea mays), and tomatoes (Solanum lycopersicum) farms in Bogor Regency as well as from rice field in Tasikmalaya Regency at both organic and conventional farms. Soil chemical characteristics were analyzed include: soil organic-C (Walkey and Black), total-N (Kjeldahl), potential-P (HCl 25%), available-P (Olsen), potential-K (HCl 25%), available-K (NH4OAc 1 N pH 7), CEC (NH4OAc 1 N pH 7), and pH (soil : water = 1: 5), while pesticide residues included levels of organochlorine (lindane, aldrin, heptaklor, dieldrin, DDT, endosulfan); organophosphates (diazinon, fenitrotin, metidation, paration, profenofos); and carbamates (carbofuran, MIPC, BPMC) in the soil by using Gas Chromatography method. Results showed that levels of soil organic-C, total-N, potential and available-P, potential and available-K, CEC, pH  at organic farms were higher than those at conventional farms. Some pesticide residues compound (organochlorines, organophosphates, and carbamates) were detected at conventional farm, while those at organic farm were not detected (trace).Keywords: Conventional farm, organic farm, pesticide residues, soil properties. [How to Cite: Muhammad AA, F Hazra, S Salma and D Nursyamsi. 2016. Soil Chemical Characteristics of Organic and Conventional Agriculture. J Trop Soils 21: 19-25. Doi: 10.5400/jts.2016.21.1.19] 
Soil Enzyme Activities and Their Relationship to Total Soil Bacteria, Soil Microbial Biomass and Soil Chemical Characteristics of Organic and Conventional Farming Muhammad Abdul Aziz; Fahrizal Hazra; Selly Salma; Dedi Nursyamsi
JOURNAL OF TROPICAL SOILS Vol 23, No 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.133-141

Abstract

Soil properties such as physical, chemical, biological, microbiological and biochemical aspects affect on soil quality. Soil microbiological activities directly affect stability of ecosystems and soil fertility. The research aimed to determine soil microbial activities through soil enzyme activities and their relationship to total soil bacteria, soil microbial biomass, and soil chemical characteristics. The research was conducted at Laboratory of Soil Microbiology, Indonesian Soil Research Institute, Bogor from July 2015 to January 2016. Soil samples 0-10 cm depth were taken from organic and conventional farming of some commodities (tomato, carrot, maize, broccoli) from Bogor Regency, while those of rice were taken from Tasikmalaya Regency. Soil dehydrogenase, urease and cellulase activities were determined using some modified methods. The results showed that soil dehydrogenase and cellulase activities in organic farming were higher than those in conventional farming, whereas the soil urease activity in organic farming was lower than that in conventional farming. The total soil bacteria and soil microbial biomass were significantly and positively correlated with soil dehydrogenase, urease, and cellulose activities. Soil dehydrogenase, urease, and cellulose activities were very significantly and positively correlated with all soil characteristics tested, i.e. soil organic C, total N, potential P and K, available P and K, CEC, and pH, except that soil urease activity was very significantly and negatively correlated with soil pH. The results of this research indicated that organic farming is recommended for maintaining soil fertility and plant productivity; however, small use of urea fertilizer is still needed in the farming.
Co-Authors Aisamrotul Hasanah Ania Citraresmini Ans Iswandi Dedi Nursyamsi Dedi Nursyamsi Nursyamsi Devi Wijayanti Dian Emilia Maulidiyah Dimas Syahiddin DWI ANDREAS SANTOSA Enny Widyati Eric Verchius Ester LN Lumbantobing Fatimah Nur Istiqomah Grahan Sugeng Aprilian Gusmaini Gusmaini Heni Hariyani Intan Delia Rustandi Irfan Septiawan Iswandi Anas Lisa Rosdiana LISDAR I. SUDIRMAN Lusiana Adriani Mentari May Syachanna Muhammad Abdul Aziz Muhammad Abdul Aziz Muhammad Samsul Maarif Nabila Dianisa Novita Sari RAHAYU WIDYASTUTI Richard Gunawan Rifqi Puja Novtiar Rio Kevin Marcello Alwi Risa Rosita Rosinta Sitepu Selly Salma Selly Salma Sindy Marieta Putri Sukmadewi, Desak Ketut Tristiana Suri Mulyani Sari Susanti Pratiwi Purnama Velicia Desyana Rakhmadina Wilhelmus Terang Arga Sanjaya Windi Windi Yunilda Rosa Yuwan Pratama Baki