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All Journal Agrikultura Journal of Tropical Soils JTSL (Jurnal Tanah dan Sumberdaya Lahan) AGRIVITA, Journal of Agricultural Science Jurnal Solum JURNAL AGROHITA Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks

Yulnafatmawita Yulnafatmawita

Andalas University

Author-ID : 425301

Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Medicine & Pharmacology Social Sciences Other

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PENGARUH PEMBERIAN BEBERAPA JENIS BAHAN ORGANIK TERHADAP PENINGKATAN KANDUNGAN HARA N, P, K ULTISOL KEBUN PERCOBAAN FAPERTA UNAND PADANG Gusmini Gusmini; Yulnafatmawita Yulnafatmawita; Anita Febriani Daulay
Jurnal Solum Vol 5, No 2 (2008): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

A research entitled the effect of various sources of organic matter on improvement of N,P,K Nutrient of Ultisol was conducted in Limau Manis Padang. The research was aimed to investigate the contribution of different source of organic matter to improve N,P,K content in soil. Field research was arranged in Randomized Block Design (RBD) consisting 5 treatments and 3 replications (blocks). Treatments are : A = no organic matter added, B = Tithonia, C = Paddy Straw, D = Imperata cylindrica, and E = Leucaena glauca. The dosage for each treatment was 20 ton/ha. The result showed that tithonia gave the best contribution in improving N,P,K content of Ultisol Limau Manis.Keywords :organic matter, N, P, K of Ultisols.

Role of Gliricidia sepium in Improving Aggregate Stability of Ultisol Limau Manis Padang: A LABoratory study Yulnafatmawita Yulnafatmawita; Asmar Asmar; Vitria Purnamasari
Jurnal Solum Vol 9, No 1 (2012): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

There is no much public concern about soil aggregate stability improvement of a soil. This is due to the fact that it does not directly affect crop yield for a short term, but it determines sustainable agriculture and development for a long term. This research was aimed to investigate soil physical properties especially soil aggregate stability of Ultisols after fresh OM application, then to determine the exact OM dosage to improve the stability. Ultisols used was from Limau Manis (± 367 m asl), an area in lower footslope of Mount Gadut, having wet tropical rainforest. Due to land use change, farming activities in that sloping area could enhance erosion process in the environment. Therefore, efforts to anticipate the erosion must be found. Fresh OM applied was Gliricidia sepium which was found plenty in the area. Five levels of fresh Gliricidia sepium, were 0, 5, 10, 15, and 20 t/ha. Top soil (0-20 cm depth) was mixed with OM, then incubated for 3 months in glasshouse. The results after a 3-month incubation showed that SOM content did not statistically increase, but it improved based on the criteria, from very low to low level as OM was applied for ≥ 10 t/ha. It seemed that 10 t/ha Gliricidia sepium was the best dosage at this condition. There was a positive correlation between SOM content and aggregate stability index of Ultisols after fresh Gliricidia sepium addition.Keywords: Ultisols, soil aggregate stability, soil organic matter content

HUBUNGAN ANTARA STATUS C-ORGANIK DAN STABILITAS AGGREGAT TANAH KEBUN PERCOBAAN LIMAU MANIS PADANG PADA BEBERAPA PENGGUNAAN LAHAN Yulnafatmawita Yulnafatmawita
Jurnal Solum Vol 3, No 2 (2006): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Organic matter is one of soil bonding agent in formation and stabilization of soil aggregates or soil structure. Since it affects several other soil peorperties, soil structure is considered as a determinant for soil quality. Therefore, depletion of organic matter content in a soil will cause soil degradation and consequently environmental pollution. This research was aimed to determine org-C status of Ultisols Limau Manis and the relationship to aggregate stability, as affected by land use change. The results showed that soil organic-C decreased by approximately 42% (from 9.86% to 5.75%) and by 55% (from 9.86% to 4.42%) at 0-10 cm depth and by 45% (from 3.79% to 2.09%) and 18% (from 3.79% to 3.10%) at 10-20 cm depth as land use was changed from forested ecosystem to perennial and annual crops, respectively, in Ultisols Limau Manis Padang. There was a tendency of positive correlation between soil org-C status and the aggregate stability, or negative correlation between org–C status and the dispersion ratio (DR). Between both depths, 10-20 cm depth showed a stronger correlation than that of 0-10 cm depth.Key words: org-C, land use change, dispersion ratio, aggregate stability

KAJIAN SIFAT FISIKA TANAH SUB DAS AIR BATANANG DAS SUMPUR KECAMATAN BATIPUH KABUPATEN TANAH DATAR Yulnafatmawita Yulnafatmawita; Amrizal Saidi; Al Asfhihani Elnita
Jurnal Solum Vol 6, No 1 (2009): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Excessive utilization of natural resource by human being will affect the sustainability of agriculture, land and environment. This is due to degradation of soil physical properties in the area. A research about study of soil physical properties had been taken out in a sub-sub watershed Batanang of Sumpur watershed, Batipuh, Tanah Datar Regency, in West Sumatra. The research was conducted by surveying the area in 2006. Disturbed and undisturbed soil samples were taken in different land units. Then, soil samples were analysed at soil laboratory, Agriculture College, Andalas University Padang. The result showed that all of land units in this sub sub watersehed had the same soil texture class, that was fine clay. The bulk volume of the soil was higher in Mixed woodland unit than those in forest land units. Permeability value of the soil was higher at forest from all degrees of slope than that at mixed woodland, even though soil organic matter content of mixed woodland unit higher than that at forest with 25-45% slope.Keywords: Sub watershed (DAS), forest, land unit, soil physical properties

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

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

EFISIENSI PEMUPUKAN P TANAMAN CABE PADA LAHAN INTENSIFIKASI YANG DIBERI BAHAN ORGANIK DENGAN TEKNIK P-32 Yulnafatmawita Yulnafatmawita; Lusi Maira; Junaidi Junaidi; Yusmini Yusmini; Nurhajati Hakim
Jurnal Solum Vol 3, No 1 (2006): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Phosphorous (P) is one of plant nutrient needed by plant in much amount as it is called as macro essential plant nutrient. This element, P, has complete problems. It is not only found in a small amount in soil compared to other nutrients, but it also has some problems in soil if it is there. At acid soils such as Ultisols, phosphorous is binded by aluminium (Al) and iron (Fe), while in basic soils it is held by calcium (ca) and magnesium (Mg). Therefore, both in acid soils or basic soils P is not available for plant growth. A research about P-fertilizer use efficiency for chilli (Capsicum annum) on intensification land which was added organic matter (OM) using P-32 technique was conducted in glasshouse and soil laboratory of Agricultural Faculty, and in laboratory of center for research utilizing nuclear science and technique (P3IN) Andalas University Limau Manis Padang from 1996 to 1997. The objective of this research was to measure P-fertilizer use efficiency (FUE) by chili on horticulture intensification area (on Andisols) as affected by organic matter. This research was designed as completely randomized design (CRD) with 2 factors those were TSP (consisting of 0, 25, and 50 kg P2O5/ha) and OM especially chicken manure (consisting of 2, 4, 6, 8, and 10 ton/ha) by 3 replications. The results showed that plant dry matter became higher by decreasing P-fertilizer added but was not significantly affected by manure. P-fertilizer (P-32) uptake by plants was not significantly affected by P-fertilizer and manure aapplication, therefore P-FUE decreased by increasing P-fertilizer added and tended to increase by increasing dosage of manure applied. Key words: fixed-P, available-P, desorpted-P, FUE, P-32 technique

PENGARUH KOMPOS ASAL KULIT JENGKOL (Phitecolobium jiringa (Jack) Prain ex King) TERHADAP CIRI KIMIA TANAH SAWAH DAN PRODUKSI TANAMAN PADI Gusnidar Gusnidar; Yulnafatmawita Yulnafatmawita; Rosa Nofianti
Jurnal Solum Vol 8, No 2 (2011): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

This research had been conducted in the greenhouse and the Soil Laboratory of the Faculty of Agriculture, Andalas University, Padang, West Sumatera. The study was done from March until October 2011. The aims of this research were to get the effect of compost from jengkol shell on chemical properties of paddy soil and rice yield. The experiments were conducted in a greenhouse and the experimental units were arranged based on completely randomized design (CRD). The treatments were application of compost K0 = 0 tons/ha (0 g/pot), K1 = 5 tons/ha (20 g/pot), K2 = 10 tons/ha (40 g/pot), K3 = 20 tons/ha (80 g/pot), K4 = 40 tons/ha (160 g/pot). The data were compared to the criteria of soil chemical properties and plant data were statistically analysed for the variance. If the F calculated > F table, the analyses were continued by using DNMRT at 0.05 level of significance. The results showed that application of 160 g compost/pot increased soil pH by 21.78%, N-total by 123.07%, organic-C by 65.84%, available P by 93.55%, K exch. by 238.35%, Ca exch. by 133.33%, Mg exch. by 90.00%, CEC by 238.90%, Cu exch. by 54,10%, as well as the yield by 12,68% compared to the treatment without compost application.Keywords : jengkol, nutrients, paddy soil, production

KLASIFIKASI BEBERAPA SUMBER BAHAN ORGANIK DAN OPTIMALISASI PEMANFAATANNYA SEBAGAI BIOCHAR Sismiyanti Sismiyanti; Hermansah Hermansah; Yulnafatmawita Yulnafatmawita
Jurnal Solum Vol 15, No 1 (2018): JURNAL SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Optimalisasi pemanfaatan bahan organik akan dapat dilakukan dengan mengetahui kualitas bahan organik tersebut. Kualitas bahan organik tidak hanya ditentukan oleh kandungan hara, namun juga kecepatan pelapukannya yang dilihat dari kandungan lignin, nisbah C/N, C/P, dan C/S. Pengujian terhadap 24 jenis sumber bahan organik di Kota Padang ini telah dilakukan pada bulan November 2016-April 2017 di laboratorium kimia tanah Fakultas Pertanian Universitas Andalas. Penelitian ini bertujuan untuk mengelompokkan bahan organik berdasarkan kandungan haranya, menentukan bahan organik yang dapat dimanfaatkan sebagai sumber biochar, dan mengkaji karakteristik dari biochar yang dihasilkan. Parameter analisis bahan organik meliputi kadar air, C-total, N-total, P-total, K-total, C/N, C/S, C/P, dan kadar lignin. Parameter analisis biochar meliputi kadar air, kandungan N-total, C-total, P-total, K-total, S-total C/N, dan kadar abu. Dua puluh empat (24) sumber bahan organik yang tersedia, dapat disimpulkan bahwa berdasarkan kandungan haranya bahan organik ini diklasifikasikan menjadi 2 yaitu : a) bahan organik berkualitas tinggi, yang terdiri dari: tithonia, krinyuh, gamal, kiambang, widelia, paku resam, azola, enceng gondok, alang-alang, jerami kacang tanah, jerami kedele, jerami jagung, kulit kakao, pupuk kandang ayam, pupuk kandang sapi, dan kulit jengkol, dan b) bahan organik berkualitas rendah yang dinyatakan berdasarkan kadar lignin, C/N, C/P dan C/S yang tinggi, yang terdiri dari : jerami padi, sekam padi, pelepah kelapa sawit, tongkol jagung, tandan kosong kelapa sawit, ampas tebu, ampas kelapa sawit, dan serbuk gergaji. Bahan organik berkualitas rendah yang dioptimalkan untuk dimanfaatkan sebagai bahan biochar adalah jerami padi, sekam padi, dan tandan kosong kelapa sawit, dengan karakteristik kimia biochar yang dihasilkan memiliki C-total (28,86%), N-total (1,27%), P-total (0,28%), K-total (0,76%), S-total (0,21%), kadar abu (25,42%), C/N (22,72), C/P (103,07), dan C/S (137,43).Kata kunci : bahan organik, biochar.

PERANAN BAHAN ORGANIK DALAM PEMBEBASAN P-TERIKAT PADA TANAH ANDISOL Yulnafatmawita Yulnafatmawita; Lusi Maira; Junaidi Junaidi; Yusmini Yusmini; Nurhajati Hakim
Jurnal Solum Vol 2, No 2 (2005): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

A research about organic matter role on P desorption in Andisol was conducted in soil laboratory of Agricultural Faculty, Andalas University Limau Manis Padang. The objective of this research was to find out the ability of organic matter to change retained- or fixed-P into available-P in Andisols. This research was designed as completely randomized design (CRD) with 5 levels of chicken manure consisting of 2, 4, 6, 8, and 10 ton/ha by 3 replications. Based on laboratory analysis, the soil (Andisols) had pH 5.65, OC 2.33%, N-total 0.26%, available-P 56.94 ppm, and potential-P 60.38 mg/100 g soil. While chicken manure had OC 21.45%, total-N 5.60%, total-P 33.19 mg/100g and C/N ratio 3.83. The results showed that desorpted-P increased by increasing amount of chicken manure applied. Key words: fixed-P, available-P, desorpted-P

KAJIAN SIFAT FISIKA EMPAT TANAH UTAMA DI SUMATERA BARAT Yulnafatmawita Yulnafatmawita; Asmar Asmar; Ari Ramayani
Jurnal Solum Vol 4, No 2 (2007): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

A research about soil physical study of four main soils found in West Sumatra was conducted in 2006. The research was aimed to determine some soil physical properties of four soil which are mostly found in West Sumatra. The four soil orders assessed were Ultisol from Agricultural Expreriment Station Limau Manis, Oxisol from Lubuk Minturun, Entisol from Tabing Kecamatan Koto Tangah Padang, dan Andisol from Bukik Gompong Kabupaten Solok. The result showed that at the depth of 0-20 cm soil profile. Ultisol and Oxisol had finer texture than those of Andisol and Entisol. Andisol was dominated by silt while Entisol was dominated by sand particles. Andisol had the lowest bulk density and the highest soil organic matter and total porosity. Soil Organic matter content of Entisol, Oxisol, and Ultisols was low in criteria. Plant available water (PAW) was higher in Oxisol, then followed by Andisol, Ultisol, and Entisol.Key words: Organic matter, bulk density, texture, porosity, plant available water

Co-Authors . Adrinal . Burbey . Gusmini Afri Yana Al Asfhihani Elnita Amrizal Saidi Anita Febriani Daulay Anwar, Al Hidayati Maulana Aprisal Aprisal, Aprisal Ari Ramayani Arief Fauzan Hakim Armansyah Armansyah Armansyah Armansyah Asmar Asmar Asmar Asmar Asmar Asmar Asmar Asmar Asmar Asmar Asmar Asmar Aulia Rahman Auzar Syarif Azwar Rasyidin Ermadani Ermadani Febrian Anggriani Gusnidar, G Haris, Zainal Abdul Hermansah Hermansah Hermansah Hermansah, Hermansah J Juniarti Junaidi Junaidi Lusi Maira Lusi Maira Matsunaga, Tsugiyuki Mimien Harianti Nurhajati Hakim Rafdea Syafitri Rantau Andhika Refdinal Refdinal Refdinal Refdinal Refdinal, Refdinal Ricci Enrella Rice Agmi Naldo Rosa Nofianti Sendi, Nofrita Sismiyanti Sismiyanti Suci Betrianingrum Sudewi Isminingsih Sudewi Isminingsih Sulaiman Saleh Suyoko Suyoko Syafrimen Yasin Teguh Budi Prasetyo Ulfa, Nadilla Utri Luki Via Permata Sari Via Permata Sari Vitria Purnamasari Wakatsuki, Toshiyuki Yusmini Yusmini Zainal A. Haris Zainal Abdul Haris

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