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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 812 Documents
 10   11   12   13   14 
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

Abstract

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.
Abundance of Soil Arthropods under Reduced Tillage and Bagasse Mulching in a Sugarcane Plantation in Central Lampung, Indonesia Fransiscus Xaverius Susilo; I Gede Swibawa; Nobuhiro Kaneko; Anastasia Kristina; Muhammad Badrus Sholih; Muhamad Jaya Saputra; Fazri Firdaus; Sri Haryani; Heru Gunito; Saefudin Saefudin
JOURNAL OF TROPICAL SOILS Vol 23, No 2: May 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i2.99-109

Abstract

This study was aimed to show whether conservation effort through reduced tillage or mulching can promote soil zoological benefits, especially to the soil arthropods in sugarcane plantations area, Central Lampung, Indonesia. Twenty sugarcane plots of 25 m × 25 m size each were prepared in the area and treated with two combined treatments i.e. tillage (no tillage and full tillage) and mulching (without bagasse and with bagasse mulch). Tillage and planting were done in July 2010 while mulching was conducted in August 2010. The arthropods were sampled using pitfall traps (mouth diameter = 13.5 cm), each was set per plot for 24 hours. Specimens were identified at least to order level. Sampling was done in September 2010 (1 month after mulch treatment, MAT), January 2011 (4 MAT), and July 2011 (10 MAT). We found four major arthropod orders, namely Araneae (spiders, predator), Coleoptera (beetles, mostly non predator), Collembola (springtails, fungal feeder), and Hymenoptera (ants, mostly forager). The last two groups were the most dominant (contributing to > 90 % of the total abundance). Tillage affected the abundance of overall soil arthropods at 1 MAT and 4 MAT but the effect disappeared at 10 MAT. Reduced tillage can conserve, or does not harm, some soil arthropod groups (ants, predatory ants, beetles, springtails, spiders) in sugarcane agroecosystem.
Micronutrient Assessment of Cocoa, Kola, Cashew and Coffee Plantations for Sustainable Production at Uhonmora, Edo State, Nigeria Joseph Sunday Ogeh; Rotimi Rofus Ipinmoroti
JOURNAL OF TROPICAL SOILS Vol 18, No 2: May 2013
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2013.v18i2.93-97

Abstract

The micronutrient status of the soils and leaf of cocoa, kola, cashew and coffee plantations to study the soil-plant micronutrient content relationship in the plantation soils for proper management towards optimum production of the crops was investigated at Uhonmora, Edo State, Nigeria. Soil and leaf samples were collected from these plantations and analyzed according to standard laboratory procedures. The soil samples were analyzed for the micronutrients (Cu, Mn, Zn and Fe) and in addition pH, organic carbon, sand, silt and clay contents, while the leaves were analyzed for only the micronutrient contents. Results indicated that the soils were sandy loam, acidic, low in organic carbon, deficient in Cu and Mn but very high in Fe and Zn contents. This probably resulted in nutrient imbalance in the soils and the deficiency of the nutrients in the crops. The plantations therefore require application of organic manures and micronutrient fertilizers to rectify the inadequate soil organic matter and to supply sufficient amount of Cu and Mn in the soils, to obtain quality fruit yield at optimum level from the plantations.Keywords: Cashew, cocoa, coffee, kola, micronutrients, sustainable production [How to Cite: Ogeh JS and RR Ipinmoroti. 2013. Micronutrient Assessment of Cocoa, Kola, Cashew and Coffee  Plantations for Sustainable Production at Uhonmora, Edo State, Nigeria. J Trop Soils 18 (2): 93-97. Doi: 10.5400/jts.2013.18.2.93] [Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.2.93]  REFERENCESAdebiyi S, EO Uwagbue, EA Agbongiarhuoyi, I Ndagi and EO Aigbekaen. 2011.  Assessment of agronomic practices among kola farmers in Osun State, Nigeria. World J Agric Sci 7: 400-403.Afolabi CA and NE Egbe. 1984.  Yield response of kola to N, P and K fertilizer application:  A case study of preliminary trial. Cafe Cacao The 28: 13-16. AOAC [Association of Official Analytical Chemists]. 1990.  Official Methods of Analysis, 15th Edition. Washington DC: 774-784.Ayanlaja SA. 1983.  Rehabilitation of cocoa (Theobroma cacao L.) in Nigeria: Major problem and possible solution. Plant Soil  73: 403-409.CBN [Central Bank of Nigeria]. 2010.  Annual Report and Statement of Accounts for the year. Abuja, Nigeria. 182 p.Chude VO and GO Obigbesan. 1983.  Safe and toxic application rates of boron for cocoa seedlings. Plant Soil 74: 145-147.Egbe NE, EA Ayodele and CR Obatolu. 1989.  Soils and nutrition of cocoa, coffee, kola  cashew and tea. Prog Tree Crop Res 2: 28-38.Falade JA. 1978.  Cashew growing soil in Nigeria. East Afr Agric J 43: 100-105. FAO [Food and Agriculture Organization]. 2010.  Food and Agriculture Organization of the United Nations.  http://faostat.fao.org/site/567/DesktopDefault.aspx? PageID=567#ancor. Accessed on 21 January 2010.Ibiremo OS and O Fagbola. 2008. Effect of phosphorus fertilizer and arbuscular mycorhizal  fungi inoculation on the growth of cashew seedlings in two soils in Nigeria. Nigerian J Soil Sci 18: 138-146.Ipinmoroti RR, OSO Akanbi, MA Daniel, LA Adebowale, GA Adewoye, EA Makinde and CO Kayode. 2011.  Potentials of NPK and organic fertilizers on growth performance of cashew (Anacardium occidentale L.) seedlings on degraded typic alfisol soils in Ibadan, Nigeria. J Agric Sci Tech 1: 876-881.Ipinmoroti RR, P Aikpokpodion and OSO Akanbi.  2009.  Nutritional assessment of cocoa plots for soil fertility management on some cocoa farms in Nigeria. Proceedings of 16th International Cocoa Research Conference Held at Grand Hyatt  Hotel, Nusa Dua, Bali, Indonesia, pp 1481-1485.Iremiren GO and  AM Ekhomun. 2005.  Effects of N fertilizer rates on the performance of maize-okra mixture in an acid sand soil of the Nigerian forest zone. Nigerian J Appl Sci 23: 11-14. McKenzie RH.  2001.  Micronutrient requirements of crops. Alberta Agriculture and Rural development   http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex713. Acessed on 21 July 2011.Nelson DW and LE Sommers. 1982.  Organic carbon and soil extracts In: D L Sparks (ed).  Methods of soil Analysis. Part 2- Chemical and microbiological properties. Agronomy Monograph No.9, 2nd Edition. American Society of Agronomy, Soil Science Society of America, Madison, WI, USA, pp. 539-579.Ogunlade MO, OS Ibiremo, RR Ipinmoroti, CI Iloyanomon and PE Aikpokpodion. 2011.  Determination of phosphorus and potassium fixation capacities and fertilizer fctors in soils of three cocoa growing areas of Nigeria. J Soil Nat 5: 11-16.Ogunmoyela OA and CR Obatolu. 1984.  Nutrient studies and fertilizer requirements of Nigeria tea. Cafe Cacao The 28: 179-184.Ogunwale JA, JO Olaniyan and MO Aduloju. 2002.  Morphological, physico-chemical and clay mineralogical properties of soils overlaying basement complex rocks in Ilorin East, Nigeria. Moor J Agric Res 3: 147-154.Ojeniyi SO. 1980. Nutrient studies of NPK treated coffee plots. Plant Soil 56: 175-179.Omotoso TI. 1974.  The effect of fertilizer and irrigation on the leaf macronutrient composition of Coffea canephora during a year. Turrialba 24: 315-318.Opeke LK. 1987. Tropical tree crops. Spectrum Books Limited, Ibadan, Nigeria, p 247.Wood GAR and RA Lass. 1985.  Cocoa, 4th ed. London: Longman, pp. 620-632.  
The Changes of Earthworm Population and Chemical Properties of Tropical Soils under Different Land Use Systems Sri Yusnaini; Ainin Niswati; Mas Achmad Syamsul Arif; Masanori Nonaka
JOURNAL OF TROPICAL SOILS Vol 13, No 2: May 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i2.131-137

Abstract

Hilly area Sumberjaya, West Lampung Province, South Sumatra, Indonesia, is one of the Province where deforestation  increasing in the past 30 years as a result of the implementation of agricultural systems, especially coffee plantation. it is important to study the soil fauna in these natural relicts. Six sites (3 naturals and 3 managed systems) were studied in order to identify earthworm species communities, using the hand sorthing  method and soil chemical parameters (pH, avail-P, org-C., tot-N, and cation exchange capacity (CEC). Two species were found (Pheretima sp. and Pontoscolex sp.). All land use systems had very similar soil chemical characteristics, there can be characterised as acidic (pH between 3.6 and 5.0). A high content of organic carbon was in natural sites (bush 4.0 % and primary forest 3.9 %),  and a low content was in managed sites (coffee plantation 2.1 %). Total nitogen (0.37 %) and CEC (21.84 Cmol-c kg-1) was in primary forest.  However, the earthworm densities were significantly lower under primary forest than in the other sites. The acidity component explained mainly   the lowest earthworm population at the primary forest (soil pH 3.6). The use of succession forest (bush) and mix farming showed a positive effect on soil fertilit.
Model Dinamik sebagai Upaya Pencapaian Sinkronisasi Nitrogen pada Budidaya Selada dengan Pupuk Hijau Paitan Yuni Agung Nugroho; Elik Murni Ningtyas Ningsih
JOURNAL OF TROPICAL SOILS Vol 14, No 2: May 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i2.127-134

Abstract

Dynamic Model as Attainment Effort of Nitrogen Synchronization at Lettuce Cultivation with Green Manure Paitan  (Y.A. Nugroho and E.M.N. Ningsih): Lettuce (Lactuca sativa) is  vegetable crop that consumed part of the leaf and harvested at a phase of vegetative. Nitrogen play important role in growth  at phase of vegetative. Nitrogen in spacious have the character of easy to lose because of leaching.  Increasing yield of  lettuce can be  done  by improving Nitrogen synchronization, that is precisely usage moment with ready moment  of N during and amount of its. The research was aimed to study of  the pattern nitrogen requirement  for lettuce crop, ready pattern of nitrogen by Tithonia diversifolia and design nitrogen synchronization model between lettuce crop with green manure of  T. diversifolia. The research were divided in two phases that are phase research 1: Dynamic modeling for nitrogen synchronization on lettuce cultivation by green manure of T. diversifolia, and phase research 2: Fertilizer technology of high nitrogen synchronization on lettuce cultivation by green manure of T. diversifolia. The result  of phase research 1 (first year research) shows that dynamic model of N requirement by lettuce crop,  release  and availability model of N by T. diversifolia and synchronization model of N  between requirement of N  lettuce with  release and availability of N by T. diversifolia.   The dynamic model   indicate that   giving  10 t ha-1  of  T. diversifolia which given 2 weeks before transplanting at lettuce crop can support high result and growth because happened good synchronization of N.
Improvement of Sand Tailing Fertility Derived from Post Tin Mining Using Leguminous Crop Applied by Compost and Mineral Soil Dedik Budianta; Nuni Gofar; Gusti Aditya Andika
JOURNAL OF TROPICAL SOILS Vol 18, No 3: September 2013
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2013.v18i3.217-223

Abstract

The research was aimed to study the potency of two leguminous cover crops in enhancing tailing fertility of post tin mining with and without addition of mineral soil  and compost. This pot experiment was carried out in Greenhouse of Soil Science Department, Faculty of Agriculture, Sriwijaya University from November 2011 until March 2012. Design experiment used was a Completly Randomized Design (CRD) factorial with two factors. The first factor was type of cover corps which were Centrosema pubescens and Pueraria javanica. The second factor was plant media composition which were 100% sand tailing, 60% sand tailing + 40%  mineral soil, and  95% sand tailing + 5% compost. The result showed that N content on sand tailing after harvesting applied by compost and mineral soil was not significant by difference. Meanwhile, P content on sand tailing applied by compost was higher than mineral soil application and/or control (100% sand tailing).Keywords: Compost, legominous crop, N and P nutrients, sand tailing [How to Cite: Budianta D, N Gofar and GA Andika. 2013. Improvement of Sand Tailing Fertility Derived from Post Tin Mining Using Leguminous Crop Applied by Compost and Mineral Soil. JTrop Soils 18 (3): 217-223. Doi: 10.5400/jts.2013.18.3.217][Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.3.93]REFERENCESAng LH. 2002. Problems and Prospecs of Afforestration on Sandy Tin Tailings in Peninsular Malaysia. J Trop Forest Sci 1: 87-105Budianta D, U Harun and R Santi. 2010. Perbaikan Sandy Tailing Asal Lahan Pasca Penambangan Timah dengan Kompos untuk Pertumbuhan Nilam. Prosiding Seminar Nasional, Masyarakat Konservasi Tanah dan Air Indonesia: 235-255, Jambi (in Indonesian).Djunaedi EK and F Djabar. 2003. Pemantauan dan Evaluasi Konservasi Sumber Daya Mineral di Daerah Bukit Sunur, Kabupaten Bengkulu Utara Provinsi Bengkulu. Kolokium Hasil Kegiatan Inventarisasi Sumber Daya Mineral – DIM, TA. 2003 (in Indonesian).Hakim N, MY Nyakpa, AM Lubis, SG Nugroho, MR. Saul, M A  Diha, G B  Hong and H H  Bailey. 1986. Dasar–Dasar Ilmu Tanah. Penerbit Universitas Lampung, Lampung (in Indonesian).Juhaeti N, N Hidayati, F Syarif and S Hidayat. 2009. Uji potensi tumbuhan akumulator merkuri untuk fitoremediasi lingkungan tercemar akibat kegiatan penambangan emas tanpa izin (PETI) di Kampung Leuwi Bolang, Desa Bantar Karet, Kecamatan Nanggung, Bogor. Berita Biologi 9: 529-538 (in Indonesian).Kasno A. 2009. Peranan Bahan Organik terhadap Kesuburan Tanah. Informasi Ringkas Bank Pengetahuan Padi Indonesia. Balai Penelitian Tanah, Bogor (in Indonesian).Mokhtaruddin A M and M Norhayati. 1995. Modification of Soil Structure of Sand Tailings: I. Preliminary Study on the Effect of Organic Amandment and Iron on Soil Aggregation. Pertanka J Trop Agric Sci 18: 85-88.Mustikarini E D, T Lestari, U Widyastuti and Suharsono. 2010. Konsentrasi Pb, Cu, dan Sn pada buah aksesi nenas lokal Bangka yang dibudidayakan di lahan pasca penambangan timah Bangka. Prosiding Seminar Naional, Masyarakat Konservasi Tanah dan Air Indonesia: pp. 293-301, Jambi (in Indonesian).Purwantari ND. 2007. Reklamasi area tailing di pertambangan dengan tanaman pakan ternak, mungkinkah?. Wartazoa  17: 101-108 (in Indonesian).Pusat Penelitian Tanah.  1983. Term of Refernce Type-A Proyek Penelitian Pertanian menunjang Transmigrasi (P3MT). Departemen Pertanian. Badan Penelitian dan Pengembangan Pertanian. Bogor (in Indonesian). Rahyunah W. 2011. Pengaruh pemberian kompos untuk tanaman caisim (Brassica juncea L.) sebagai rotasi tanaman setelah padi pada sistem pertanian terapung di lahan rawa lebak. Skripsi pada Jurusan Tanah. Fakultas Pertanian. Universitas Sriwijaya, Indralaya (unpublihed, in Indonesian).Risza R. 1995. Budidaya Kelapa Sawit. AAK. Kanisius. Yogyakarta (in Indonesian).Saptiningsih E. 2007. Peningkatan produktivitas tanah pasir untuk pertumbuhan tanaman kedelai dengan inokulasi mikorhiza dan rhizobium. BIOMA 9: 58–61 (in Indonesian).Setyorini D and RW Ladiyani. 2005. Cara Cepat Menguji Status Hara dan Kemasaman Tanah. Balai Penelitian Tanah. Bogor (in Indonesian).Sinar Tani. 2008. Teknologi Pencetakan Sawah Dan Pengelolaan Sawah Pada Lahan Tambang Timah. Available at http://www.sinartani.com/iptek/teknologi-pencetakan-sawah-dan-pengelolaan-sawah-pada-lahan-tambang-timah-1274070248.htm (diakses tanggal 25-4-2011) (in Indonesian).Sitorus SRP and LN Badri. 2008. Karakteristik tanah dan vegetasi lahan terdegradasi pasca penambangan timah serta teknik rehabilitasi untuk keperluan revegetasi. Prosiding Semiloka Nasional Strategi Penanggulangan Krisis Sumber Daya Lahan Untuk Ketahanan Pangan dan Energi, pp. 140-150 (in Indonesian).Sitorus SRP, E Kusumastuti and  N Badri. 2005. Karakteristik dan teknik rehabilitasi lahan pasca penambangan timah di pulau Bangka dan Singkep. J Tanah dan Iklim 27: 57-73 (in Indonesian)Sopian  A. 2009. Respon tanaman karet pada lahan pasca tambang batubara terhadap bahan amelioran berupa pupuk NPK dan kapur dolomit. J Agrifor 7(1): 1-7 (in Indonesian).Sudaryono. 2009. Tingkat kesuburan tanah ultisol pada lahan pertambangan batubara Sangatta, Kalimantan Timur. J Teknik Lingkungan 10: 337- 346 (in Indonesian).Suwandi. 2009. Menakar kebutuhan hara tanaman dalam pengembangan inovasi budidaya sayuran berkelanjutan. Pengembang Inovasi Pert 2: 131-147 (in Indonesian).Syarif F, N Hidayati and T Juhaeti. 2009. Tumbuhan Berdaun Lebar Berpotensi Akumulator. Tumbuhan Akumulator untuk Fitoremediasi Lingkungan Tercemar Merkuri dan Sianida Penambangan Emas. LIPI press, Jakarta (in Indonesian).Yani M. 2005. Reklamasi lahan bekas pertambangan dengan penanaman jarak pagar (Jatropha  curcas Linn). Pusat Penelitian Surfaktan dan Bioenergi. LPPM – IPB, Bogor (in Indonesian).Ye ZH, WS Shu, ZQ Zhang, CY Lan and MH Wong. 2002. Evaluation of Major Constraint to Revegatation of Lead/Zinc Mine Tailings Using Bioassay Techniques. Chemosphere 47: 1103-1111. 
Pemanfaatan Tithonia Diversifolia pada Tanah Sawah yang Dipupuk P Secara Starter terhadap Produksi serta Serapan Hara N, P, dan K Tanaman Padi . Gusnidar; Teguh Budi Prasetyo
JOURNAL OF TROPICAL SOILS Vol 13, No 3: September 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i3.209-216

Abstract

The research of Tithonia diversifolia utilization in the paddy soil that was fertilized P-starter on yield and N, P, K uptake on rice crop, has been conducted from August to December 2005.  The objective of this research was to determine interaction between P-starter levels, and tithonia levels on production and N, P, K element uptake of rice crop. The research was pot experiment in the green house in factorial design 4 x 4.  First factor was 4 levels of tithonia with reduce dosage fertilizer aplied (T0 = 0 t tithonia + 200 kgUrea ha-1 + 75 kg KCl ha-1; T1= 2,5 t tithonia ha-1 + 150 kg Urea ha-1, without KCl; T2 = 5,0 t tithonia ha-1 + 100 kg Urea ha-1, without KCl; dan T3 = 7,5 t tithonia ha-1 + 50 kg Urea ha-1, without KCl).  The second factor was 4 levels of P-starter (0, 2, 4, and 6 kg P ha-1).  The result showed that combination T3 treatment and 2-4 kg P-starter ha-1 increased the grain yield 20,51-21,08 g pot-1 (18,65-19,21%). Effect of T3 treatment was not significant with T2 treatment on the grain yield.  The best interaction was T3 treatment on N and K uptake ((0,84 g pot-1 for N, dan 0,82 g pot-1 for K).  
Dynamics of pH, Ferrum and Mangan, and Phosphorus on Newly Opened Paddy Soil having High Soil Organic Matter on Rice Growth Ladiyani Retno Widowati; . Sukristyonubowo
JOURNAL OF TROPICAL SOILS Vol 17, No 1: Januari 2012
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2012.v17i1.1-8

Abstract

Research had been carried out at the Research and Soil Testing Laboratory and Greenhouse of Soil Research Institute, Bogor using newly opened paddy soil from Pesisir Selatan districts, West Sumatra (one year old). Total treatments tested were 12 which were combination of farmer rate, NPK recommendation (½×; ¾×; 1½×), straw compost (½×; ¾×; 1½×), and dolomite. The trial was conducted using a completely randomized design with three replications. This research had been prepared in two units, one unit for observing plant response to nutrient management and another unit for incubation trial with the same treatment placed in the greenhouse.  Rice cultivar used was IR-42 in accordance to the preferred varieties of local farmers. The sampling method for measuring the solubility of Fe2+ and Mn2+, as well as the availability of PO43- was by centrifuge 50 g mud samples from the incubation pots then separated clear extract using filter paper. The observation results on dynamics of pH, Fe2+, Mn2+ and PO4-3 mainly occured in 1 to 14 days after submerging (incubation). After 14 days soil reaction had reached thermodynamic sequence of oxidation-reduction processes, the PO43- more available and pH of the soil reached the peak. The optimum dose of NPK fertilizer obtained 0.875 NPK or equal to 175 kg of urea, 87.5 kg of SP-36 and 87.5 kg KCl ha-1. The highest number of hills achieved from straw compost treatment 1½ organic matter (OM) or 3 tons with an increase of 20%. Application of ameliorant dolomite increased the number of tillers about 2-3%, but insignificantly different with no dolomite treatment.
Evaluation of Primary Macro Nutrients on Arboretum Area in Lampung University Campus, Gedong Meneng Nur Afni Afrianti; Tamaluddin Syam
JOURNAL OF TROPICAL SOILS Vol 19, No 2: May 2014
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2014.v19i2.91-97

Abstract

Vegetation has a strong influence on soil characteristics. Vegetation can contribute organic matter sand nutrients to the soil. This study aimed to assess soil fertility through various approaches physical and chemical soil on various types of cover crop in the  arboretum area at University of Lampung, and determined the type of cover crop that had the best effect on soil fertility. The research was be conducted by a survey method, which made observations on the soil characteristics of six species of cover crops following were rosewood (Dalbergia latifolia), teak (Tectona grandis), albizia (Paraserianthes Albiziaria), acacia (Acasia mangium), fern tree (Filicium desipiens), and mahogany (Swietenia macrophylla King). Soil characteristics observed data were the physical and chemical properties, obtained by field observations, through boring profiles and soil sampling. The results showed that soil fertility on rosewood, albizia, acacia and mahogany on campus area of Lampung University had contents of soil organic C, organic matter, and soil total N higher than teak and Fern tree. Litter from Rosewood, Albizia, and acacia had the best effect on soil fertility, so they could be the best covered vegetation to improve soil characteristics related to optimal and sustainable of land management.Keyword : Acacia, albizia, arboretum, cover crop, fern tree, litter, macronutrient, mahogany, rosewood, teak, and vegetation. [How to Cite: Nur AA and T Syam. 2014. Evaluation of Primary Macro Nutrients on Arboretum Area in Lampung University Campus, Gedong Meneng. J Trop Soils 19(2): 101-107. Doi: 10.5400/jts.2014.19.2.101]   
The Effectiveness of AMF Inoculum to Enhance The Potency of Papuan Crandallite Phosphate Rock and The Growth of Cocoa Seedling Antonius Suparno
JOURNAL OF TROPICAL SOILS Vol 14, No 3: September 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i3.261-267

Abstract

Phosphate rock fertilizer has slow solubility; therefore, it is suitable and more effective to be applied on annual crop plantation. To increase the solubility and the effectiveness of phosphate rock application, inoculation of the Arbuscular Mycorrhyzal Fungi (AMF) is required. Experiments were conducted at the Cikabayan Farm, Bogor Agriculture Institute, West Java. The objective was to study the effectiveness of AMF inoculation in increasing the potency of Papuan Crandallite Phosphate Rock to the growth of cocoa seedlings.  A factorial experiment was set up in a complete randomized design. The first factor was AMF inoculation, consisting of none AMF, Manokwari indigenous AMF and Mycofer AMF, and the second factor was five dosages of the Papuan Crandallite Phosphate Rock (PCPR), consisting of  0,  0.5,  1.0,  1.5 and 2.0 g P2O5 / seedling. The dosage of 2.0 g P2O5 SP-36 per seedling was used as a comparison. Cocoa seeds of F-1 Upper Amazon Hybrid (UAH) were collected from the Coffee and Cacao Research Center, Jember, East Java. The seedlings were grown in polybags of 20 cm x 30 cm size, with ultisol acid soil obtained from Jasinga (West Java) as the growing medium under 60% of shading net for four months. The media contained 17.03 cmol kg-1 of exchangeable Al.  The results showed that increasing the dosages of PCPR at the AMF inoculated seedlings resulted to the linear increase of shoot dry weight and P uptake by 50.14% and 64.88%, respectively; and this was lower than the inoculation of Manokwari indigenous AMF which increased shoot dry-weight by 66.30% and P uptake by 65.45%. Whereas the shoot dry-weight and P uptake of the non-mycorrhizal seedlings increased by 73.56% and 121.94%, respectively. Mycofer inoculants were found to be much more effective in increasing the shoot dry-weight by 127.55% and P uptake by 45.16% than that of the Manokwari indigenous AMF, which increased by 95.97% and 21.29% in shoot dry-weight and P uptake, respectively at the PCPR dosage of 2.0 g P2O5 / seedling as compared to the non-inoculated seedlings.

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