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Jurnal Solum
Published by Universitas Andalas
ISSN : 18297994     EISSN : 02560835     DOI : https://doi.org/10.2057/jsolum
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Focuses and scopes of Jurnal Solum is to publishes all aspects in the original research of soil science or review covering: 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.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah
Articles 6 Documents
 1 
Search results for , issue "Vol 9, No 2 (2012): Jurnal SOLUM" : 6 Documents clear
PENGARUH RANCANGAN BARISAN DAN PERIODE PANGKAS TERHADAP BIOMASA DAN HASIL UNSUR HARA TITONIA (Tithonia diversifolia) PADA ULTISOL Asmar Asmar; Oktanis Emalinda; Dicky Hadi Vendra
Jurnal Solum Vol 9, No 2 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1332.602 KB) | DOI: 10.25077/js.9.2.77-90.2012

Abstract

A field research about cultivating tithonia (Tithonia divesifolia) was aimed to determine the best row design and trimming period to produce high biomass and nutrient content of tithonia in Ultisol. The research was conducted in Andalas University Experiment Station and Laboratory of Research Center for Utilization of Nuclear Science and Technology (P3IN) Universitas Andalas Limau Manis Padang. The research consisted of 2 factors, row design for tithonia cultivation at farming site (R) (R1=alley fence, 1 m width times 5 m distance; R2 = 1 m width as a fence for farming site 10 m x 10 m area) as the main plot and trim period (U) (U1=trimming every 2 month, U2=trimming every 4 months), at 3 blocks The results showed that both row designs gave the same performance in terms of producing biomass and plant nutrients (N,P,K,Ca,Mg). The best trimming period was found under U1. Tithonia cultivation as R1 combined with trimming period (U1) yielded approximately 2.2 ton dry matter/ha, 62.82 kg N/ha; 17.67 kg P/ha; 81.06 kg K/ha 13.35 kg Ca/ha and 5.47kg Mg/ha. Both row designs with trimming period every 2 months could be recommended to cultivate tithonia in Ultisol.Key Words: Tithonia diversifolia cultivation, trim period, Ultisol
ANALISIS SIFAT FISIKA ULTISOL TIGA TAHUN SETELAH PEMBERIAN BAHAN ORGANIK SEGAR DI DAERAH TROPIS BASAH SUMBAR Yulnafatmawita Yulnafatmawita; Rice Agmi Naldo; Azwar Rasyidin
Jurnal Solum Vol 9, No 2 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.261 KB) | DOI: 10.25077/js.9.2.91-97.2012

Abstract

Ultisols as a marginal land need to be reclaimed especially the soil aggregate stability (SAS) under wet tropical area. A research about application of 3 types of fresh organic matter (FOM): Gliricidia sepium dan Tithonia diversifolia) aiming to improve SAS was conducted in Ultisol Limau Manis, wet tropical area, West Sumatra. Fresh organic matter was added to soil at 3 different slope (3, 12, dan 25% slope) in early 2008, then the soil was planted by corn for 4 times until the end of 2009. Corn biomass was return to the land as mulch between crop rows every harversting. The land, then, was fallowed for 1 year (in 2010) before the soil was sampled in 2011 for the physical properties analyses. The results showed that soil organic matter (SOM) content, SAS, permeabilitas, and total pore at 0-20 cm soil depth from plots applied with FOM at all classes of slope were still higher than those control plots. From 3 FOM added, plot added with Tithonia diversifolia still showed better soil physical properties (SOM = 8.3%, SAS = 83). It means that FOM application on Ultisol under wet tropical raiforest still gave effect until 3 years after application.Key Words: Ultisol, stabilitas aggregat, bahan organik segar, bahan organik tanah
Perbaikan Sifat Kimia Oxisol dengan Pemberian Bahan Humat dan Pupuk P untuk Meningkatkan Serapan Hara dan Produksi Tanaman Jagung (Zea mays, L.) Herviyanti Herviyanti; Chici Anche; Gusnidar Gusnidar; Irwan Darfis
Jurnal Solum Vol 9, No 2 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (91.053 KB) | DOI: 10.25077/js.9.2.51-60.2012

Abstract

A research was carried out at glass house and at Soil Laboratory of Faculty of Agriculture, Andalas University Padang. The experiment was aimed to determine the interaction between humic material from compost and P fertilizer on some chemical properties of Oxisol, nutrient uptake and corn production. This experiment consisted of 2 factors (4 x 4) with three replications which were allocated in completely randomized design (CRD). The first factor was humic material having 4 doses (0, 400, 800, and 1200 ppm) and the 2nd factor was P fertilizer having 4 doses (100%, 75%, 50%, and 25% of recomendation (R)). The result showed that there was : 1) Interaction between humic materials and P fertilizer for the quality the corn seeds. Application of 800 ppm humic material improved the quality of the seeds even though at low level of P fertilizer. 2) Then, it also increased availability of P by 23.03 ppm, N total by 0.09 %, and decreased Al-exch by 0.53 me (100 g)-1 and Fe-exch by 25.62 ppm compared to threatment without application of humic material. Likewise, nutrients (N and P) uptake by plant also increased by 0.28 and 0.03 %, respectively. 3) Application of P fertilizer at 75 % R increased soil P availability by 3.77 ppm, N and P content of plant by 0.43 % and 0.06 %, and seed weight by 13.20 g and decreased Fe-exch by 21.16 ppm, compared to 25 % R of P fertilizer.Keywords : humic material, P- fertilizer, nutrient uptake
KERAGAMAN BAKTERI PENAMBAT N PADA RHIZOSFIR TITONIA (Tithonia diversifolia) YANG TUMBUH PADA TANAH MASAM ULTISOL Agustian Agustian; Rimadhani Syafei; Lusi Maira
Jurnal Solum Vol 9, No 2 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (76.332 KB) | DOI: 10.25077/js.9.2.98-105.2012

Abstract

Research on biodiversity of  N-fix bacteria was performed on rhizosphere  of Tithonia diversifolia grown at acid soil Ultisol. This study aimed to determine the biodiversity and populations of N-fix bacteria along with the growth rate of Tithonia and characterized the bacterial isolates obtained from the rhizosphere of this plant. Soil rhizosphere samples were taken from rhizospheres of Tithonia with different criteria of stem diameter i.e Ø <3 cm, and 3 to 6 cm that grown  at Faculty of Agriculture Andalas University experimental station.From these results it can be concluded that the diverse and larger population were  found in Tithonia with 3 to 6 cm stem diameter  an average of 19.7 x 103 cfu per g of soil. N-fix bacterial isolates obtained have a round, slimy, slippery and convex colonies and gram variable. Based on the color of their colonies, N-fix bacterial isolates obtained were classified into 3 groups with the following characteristics: (1) white milk isolates (A1ps, a2ps, B3ps), flourescent white and yellow, have flagella and produce auxin, (2) yellow isolate (B2K and B3K), with yellow flourescent, have flagella and produce auxin, and (3) the clear isolates that could separated into two groups i.e the flourescent group and produce auxin and has flagella isolates (A2b, A3b, and B2b) and non flourescent group, no flagella and does not produce auxin isolates (B1b, B3B). The optimum growth conditions for the all isolates were pH media nearly 7 with 35o C incubation temperature. The translucent isolates (A3b and B3B) have a optimum range pH from 4.36 to 6.17, while isolates with a yellow colonies (B2K) has a range of incubation temperature 25oC to 35oC. However, from the characterization performed could not permit to specify the isolates obtained into species.Key words : Biodiversity, N-fix bacteria, rhizosphere, Tithonia diversifolia
TINGKAT KESUBURAN DAN REKOMENDASI PEMUPUKAN N, P, DAN K TANAH SAWAH KABUPATEN BENGKULU SELATAN Nurmegawati Nurmegawati; W Wibawa; E Makruf; D Sugandi; T Rahman
Jurnal Solum Vol 9, No 2 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.061 KB) | DOI: 10.25077/js.9.2.61-68.2012

Abstract

An alternatif way to determine soil fertility level as well as to recommend fertilizer application is by using soil test kit. The kit can measure P and K status of soils as well as the pH value. The research was aimed to evaluate soil fertility level of paddy soil and to determine fertilizer recommendation for rice (variety ? IR64) having 5 t mill-dry seeds/ha at the soil in Kedurang Ilir and Seginim, South Bengkulu. Soil samples were collected in 24 villages in the area, then they were analyzed using the Test Kit. The results showed that (1) fertility level of paddy soil in Seginim was higher than that in Kedurang Ilir, (2) there were 4 packages of fertilizer doses (250- 100-100; 200-75-100; 250-50-100; 200-100-100 kg/ha for Urea-SP36-KCl, respectively) recommended in Kedurang Ilir, (3) there were 7 packages of fertilizer doses (250-100-100; 200-50-100; 250-75-100; 200-100-75; 200-75-100; 200-100-100; 250-50-100 kg/ha for Urea, SP36, and KCl, respectively) in Seginim.Key Words: paddy soil, fertility, soil test kit
SURVAI KESESUAIAN LAHAN UNTUK TANAMAN MANGGIS (Garcinia mangostana L) SEBAGAI TANAMAN KONSERVASI DI KABUPATEN LIMAPULUH KOTA SUMATERA BARAT Aprisal Aprisal
Jurnal Solum Vol 9, No 2 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (98.179 KB) | DOI: 10.25077/js.9.2.69-76.2012

Abstract

The research was aimed to determine land suitability for manggis (Garcinia mangostana L) as a type of conservative crops in seven regions in District of Lima Puluh Kota. Survey method with purposive random sampling was employed at this study. Soil samples were randomly taken in each region for the physical and chemical analyses in laboratory. Secondary data for climate were obtained at Agriculture Department of the District. Both soil and climate data were arranged and interpreted for manggis growth requirement. The result showed that actual land suitability for each region was classified into S2-S3, with limiting factors were availability of plant nutrients and water, as well as topography. However, by improving soil fertility through OM application as well as soil conservation action, potential land suitability could be increased to be S2-S1 as in Guguk and Bukit Barisan.Keywords: land suitability, soil conservation, manggis

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