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Yulnafatmawita Yulnafatmawita

Fakultas Pertanian Universitas Andalas

Author-ID : 2853948

Agriculture, Biological Sciences & Forestry Environmental Science

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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.

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

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

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