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All Journal AGROLAND: The Agricultural Sciences Journal Soil REns Media Agribisnis AGRIC

Apong Sandrawati

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Author-ID : 2603366

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Social Sciences

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Hubungan Karakteristik Topografi dengan Sifat-Sifat Fisika Tanah Studi Kasus: Sub DAS Citarik, DAS Citarum Hulu Ade Setiawan; Mahfud Arifin; Rachmat Harryanto; Apong Sandrawati
Soilrens Vol 16, No 1 (2018)
Publisher : Fakultas Pertanian Universitas Padjadjaran

The proper understanding about spatial soil diversity is very important to simulate environmental model and to manage land resources in the landscape scale. Information of soil diversity is also noteworthy for environmental academics, forestry, civil engineering, and land use planner. Until now, most of the soil information are derived from conventional soil maps which are lack of detailed information. This condition can increase the uncertainty of model output and can also be an obstacle to the future development of spatial distribution model. According to this situation, the research was conducted in Sub Watershed of Cikeruh, Citarik, and Citarum Hulu. These areas are located in the 6o53’00”S - 6o53’15” S and 107o45’21”E - 107o45’55”E at 780-1800 m asl, The rainfall is classified as type C according to the Schmidt and Fergusson classification with mean rainfall around 1795.66 mm per year. The soils in the research areas are classified as Inceptisols. The research aims to analyze and elucidate the relation between topographic characteristics and soil physical properties. Some parameters studied in this research are elevation, aspect, plan curvature, profile curvature, topographic wetness index (TWI), topographic position index (TPI), and some soil physical properties, such as soil texture (clay, silt, and sand), soil organic carbon, soil bulk density, soil available water capacity, soil porosity and permeability. The results showed that all topographic parameters were related to one or some soil physical properties, except aspect and slope. Topographic variables that are frequently related to soil properties are TPI and TWI. Keywords: topographic characteristics, elevation, aspect, curvature, TWI, TPI, soil physical properties

Aplikasi Pupuk N, P, K dan Konsorsium Pupuk Hayati terhadap Retensi Hara, Serapan, dan Hasil Kedelai (Glycine max (L.)) pada Inceptisol Anni Yuniarti; Yuliati Machfud; Eso Solihin; Yogi Sudirman; Apong Sandrawati
Soilrens Vol 16, No 1 (2018)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Inceptisol is a widespread soil order with low fertility. Hence it is necessary to improve its quality status through the application of chemical and biological fertilizers. The main objecttive of this study is to determine the effect of NPK fertilizer and biofertlizer consortia (BC) combinations in Inceptisols towards N and P availability in soil and uptake by soybean (Glycine max L.). Experiments were carried out from April to August 2016 at Ciparanje Experimental Farm, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, Sumedang at the approximate altitude of 720 meters above the sea level. Randomized Block Design experimental design consisted of ten treatments and three replications was used in this study. Treatments consisted of control (no treatment), Recommended NPK dosage, 0 NPK + 1 BC, ¼ NPK + 1 BC, ½ NPK + 1 BC, ¾ NPK + 1 BC, 1 NPK + 1 BC, ¾ NPK + ¼ BC, ¾ NPK + ½ BC and also ¾ NPK + ¾ BC. Experimental results showed that the combination of NPK fertilizer and soybean-spesific biofertilizer consortium increased soil total phosphate content, nitrogen uptake by plant, and soyben yield significantly. Keywords: Biofertilizer, Soybean, total-N, Uptake of N, Inceptisols

Pendugaan Tingkat Produktivitas Lahan untuk Tanamanan Kelapa Sawit (Elaeis guineensis jacq) di Kabupaten Bangka dan Bangka Barat Apong Sandrawati; Aldi Putra Guntara
Soilrens Vol 14, No 2 (2016)
Publisher : Fakultas Pertanian Universitas Padjadjaran

The aimed of this research was to find out the level of agricultural land productivity with Storie Index Method and predict oil palm productivities based on land productivity. This research had been done since May until August 2014 at Bangka and West Bangka District. The landuse consisted with forest, crop fields, plantation, paddy soils and heath. The slopes consisted with vary on declivity; 0-8 %, 8-15 %, 25-40 % dan > 40 %, meanwhile the soil’s great group consisted with Haplohemists, Hapludox, Endoaquepts, Hydraquent, Udipsamments dan Dystrudepts. The district was on two type of rain fall, there was 2750 and 3000 mm/year. Analisys unit was land units that build from overlay those land variable. There was 24 land unit as research analisys unit. Data analisys used Storie Index Rating as parametrics approach. The result of this research showed that the level of productivity in Bangka and West Bangka District was excellent, good, moderate, and poor. The most extensive land quality is at grade 3 or medium quality is amounted to 394.668, 97 Ha or 70,49 % of total areas. Based on land productivity levels, productivity of oil palms counted that higher potential was in medium class with productivities range 11-18 tonnes/Ha/years. This area was speard 536.242,34 Ha or 95,78 % of total areas.Key words: Land productivity, storie index, oil palm productivities

Identifikasi Taksa Tanah di Situs Megalitik Gunung Padang Kabupaten Cianjur Mahfud Arifin; Ridha Hudaya; Apong Sandrawati; Muhammad Amir Solihin; Ganjar Herdiansyah
Soilrens Vol 14, No 2 (2016)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Mount Padang was famous megalith sites placed in Cianjur District. Mani discipline of science studied Mount Padang sites in order to find out the truth of histories. Based on geological studies, Mount Padang sites constructed by andesitic rock, this argument need more fact for get the real data. This research aimed to analysis pedological proses in Mount Padang sites. The result of study was soil classification which description by soil profile. Based on result of reseach the soil in Mount Padang formed in Qv rock formation. The result of soil profile analized with 2 meters depth, there was 10 layer formed e.g Ap, AB, Bw1, Bw2, BC1, BC2, CB1, CB2, C1, and C1. The genesis of Mount Padang soil was in viril levels, due to molic epipedon and cambic that found as below horizon diagnostics. Based on soil taxonomy, this pedon were classified as Typic Dystrudepts.Key words: megalith sites, andesitics rock, soil profile, viril, cambic

Co-Authors Abraham Suriadikusumah Ade Setiawan Aldi Putra Guntara Anni Yuniarti Dewi Rengganis Elita Cahyani Ernah Ernah Eso Solihin Ganjar Herdiansyah Mahfud Arifin Melania Fadillah Muhammad Amir Solihin Rachmat Harryanto Ridha Hudaya Sudarjat Sudarjat Yogi Sudirman Yuliati Machfud Zaenal Mutaqin

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