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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 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

ANALISIS KANDUNGAN SEDIMEN DAN HARA TERANGKUT PADA DAS SUMPUR KABUPATEN TANAH DATAR Yulnafatmawita Yulnafatmawita; Amrizal Saidi; Aulia Rahman
Jurnal Solum Vol 7, No 2 (2010): JURNAL SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

A study about sediment content and nutrient movement was conducted in Sumpur watershed, Tanah Datar Regency, West Sumatra. The objective of the research was to determine sediment content and nutrient movement on Sumpur watershed and the relationship. Survey method by sampling water in joining river was employed to this research for sampling water. Water was sampled exactly after rain or at the time of river debit was maximum and without rain as a control. Water flowing into the river comes from several lad uses in the upper watershed. There were four types of land use found in the areas, those were forest, mixed garden, annual season crops, and rice field. Based on field observation it was found that there were two classes of soils there, Andisols and Inceptisols. The results of laboratory analyses showed that river current, soil consentration in river water, as well as sediment content were linearly correlated to rainfall amount. Positive linear correlation was also found between river debit and carried nutrients (N, P, K, Ca, Mg, Na) from the research area. Keywords: watershed, rainfall, sediment carried, and nutrient carried

KAJIAN SIFAT FISIKA TANAH PADA PERTUMBUHAN TANAMAN MANGGIS (Garcinia mangostana L.) DI KABUPATEN LIMA PULUH KOTA Yulnafatmawita Yulnafatmawita; Adrinal Adrinal; Sudewi Isminingsih
Jurnal Solum Vol 5, No 2 (2008): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

This research was aimed to evaluate physical properties of soils grown by mangosteen crops in Lima Puluh Kota Regency, especially in Kecamatan Payakumbuh and Kecamatan Guguk, in West Sumatra. Soils were sampled by using sample rings for undisturbed and by using soil driller for disturbed samples on 0-20, 20-40, and 40-60 cm soil depth. Soil samples were analyzed in Soil Laboratory Agriculture Faculty, Andalas University, Padang. The results showed that soil texture in two locations was similar, that was silty loam for the 0-40 cm depth, and clay for the 40-60 depth. However, generally soil organic matter content in Guguk was lower than that in Payakumbuh, that was medium to low, BV from low to high, total porosity from high to medium, and permeability from high to slightly slow. Key Words: Soil physical properties, mangostana

PENCUCIAN BAHAN ORGANIK TANAH PADA TIGA PENGGUNAAN LAHAN DI DAERAH HUTAN HUJAN TROPIS SUPER BASAH PINANG-PINANG GUNUNG GADUT PADANG Yulnafatmawita Yulnafatmawita; Adrinal Adrinal; Arief Fauzan Hakim
Jurnal Solum Vol 8, No 1 (2011): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Study about soil organic matter (SOM) leaching in soil profiles of tropical rain forest was conducted in Bukit Pinang-Pinang, the upper footslope of Mt. Gadut in West Sumatra, and in Soil Physical laboratory Andalas University Padang. Bukit Pinang-Pinang is located on 480-640 m asl and geographically is between 100°29’40” and 100°30’20 E” as well as between 0°54’55” and 0°55’45”S. This rain forest area is known as a super wet area because it receives high annual rainfall (>3500 mm). The objective of this research was to measure the amount of SOM leached from top soil into the deeper soil. Undisturbed soil samples were taken from three different land uses, forest, bush, and mixed garden, on the top, middle, and foot slopes. Undisturbed soil samples were leached with distilled water as the amount of rainfall accepted in natural condition. The results showed that, land use change from forest into ecosystems of mixed garden (for over 50 years with 100% soil surface coverage and without any cultivation) and bush land (for over 20 years left) did not cause the SOM content in the profiles decreased. Amount of SOM leached from the top 0-10 cm was found greater from mixed garden, then followed by forest on the upper slope, forest on the middle slope, and bush area.Keywords: SOM leaching, land use change, tropical rain forest, bush, mixed garden

KAJIAN SIFAT FISIKA TANAH BEBERAPA PENGGUNAAN LAHAN DI BUKIT GAJABUIH KAWASAN HUTAN HUJAN TROPIK GUNUNG GADUT PADANG Yulnafatmawita Yulnafatmawita; Utri Luki; Afri Yana
Jurnal Solum Vol 4, No 2 (2007): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Study about soil physical properties of Bukik Gajabuih Padang, the area receiving high annual rainfall (>5000 mm), was conducted at different land uses in 2006. The objective of this research was to measure the change of soil physical properties as forest was cut down and converted into mixed perennial plant field and into bush land. The results showed that changing forest area into land use for mixed perennial trees for more than 50 years increased SOM content on the top 0-20 cm, but decreased on the 20-40 cm layer. The highest SOM content was found under bush land. Therefore, the bulk densisty of the soil decreased from forest to mixed land use and to bush land. The opposite trend was found for total pores and permeability rate. While the plasticity index of the soil followed the clay percentage of the soil texture, it increased by increasing clay content of soil from forest into mixed field and bush land use.Key Words: Land Use Change, Soil Organic Carbon, Soil Physical Properties

PENGUKURAN INFILTRASI TANAH BUKIT PINANG-PINANG KAWASAN HUTAN HUJAN TROPIK GUNUNG GADUT PADANG DI LABORATORIUM Yulnafatmawita Yulnafatmawita; Asmar Asmar; Ricci Enrella
Jurnal Solum Vol 6, No 2 (2009): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

A research about infiltration rate of soils from Pinang-Pinang area, a super wet tropical rain forest gunung Gadut Padang, was conducted in soil laboratory Agriculture Faculty, Andalas University. Pinang-pinang area is located in Kecamatan Pauh, in the upper footslope of Gadut mountain, functiong as water regulation for the area down under, especially Padang city. This is caused by the fact that water from the Pinang-Pinang area will fow to the sea through Kuranji river. This area is supposed to be protected to avoid natural disaster in the area down under. This research was aimed to determine infiltration rate of soils under different land use in the Pinang-Pinang region. There were three land use in this area, forest, mixed garden, and bush. Undisturbed soil samples were taken from each land use by using 11-cm in diameter and 40 cm height tubes. Soils samples were tightly closed, and brought into laboratory. Infiltration rate from each soil samples were determined in laboratory. The results showed that mixed garden gave the highest infiltration rate (38.4 cm jam-1) among the land use tested, and then followed by forest land use, and then bush land.Key Words: infiltration, land use, tropical rain forest

DETERMINASI ENERGI POTENSIAL AIR TANAH ULTISOL LIMAU MANIS DENGAN METODA KOLOM AIR, KERTAS SARING, DAN TEKANAN UDARA Asmar Asmar; Yulnafatmawita Yulnafatmawita; Ari Ramayani
Jurnal Solum Vol 3, No 2 (2006): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Water content at several levels of soil water potential is important to determine soil water available for plant growth. Standard method used to analyse soil water potential is by using Pressure and membrane Plate Apparatus. Alternative methods can be used are by using Buchner Tunnel and Filter paper Methods. This research was aimed to compare the results of Buchner Tunnel and Filter paper Methods on Pressure method in determining soil water potential. The result showed that, from the two alternative methods tested, KA tanah determined by filter paper method gave results closer to the pressure method for Ultisol Limau Manis. Then, among three laboratoriums giving services on soil water potential determination by using Pressure plate apparatus, laboratorium of soil physics from Jambi University gave results which were more rational to the soil physical properties of Ultisol Limau Manis.Key Words: Soil water potential, plant available water, Buchner tunnel, filter paper, pressure plate apparatus

Co-Authors . Adrinal . Burbey . Gusmini Afri Yana Al Asfhihani Elnita Amrizal Saidi Anita Febriani Daulay Anwar, Al Hidayati Maulana 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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