Browsing by Author "Zahrah, Siti"

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    Physical and Chemical Peatsoil Properties Assessment in Kampar Peninsular Region, Sumatera, Indonesia
    (2017-10-14) Darmawan, Budi; Siregar, Yusni Ikhwan; Sukendi, Sukendi; Zahrah, Siti
    Forests and peat fires prior to agriculture use has become a perennial problem in Indonesia, especially in the last 20 years during the dry season. Most of that smoke originates from human activity - land use and land cover change (LULCC) i.e. illegal forests and peat land, slash and burn method during cultivation or plantation agriculture development, etc. In order to understand how big the burning impact to peat soil parameters change in those three different conditions i.e. before burning (naturally), seven days after burning and ninety days after burning in same site location, accordingly we conducted a study. This research was conducted in Teluk Meranti District, Kampar Peninsular Region, Sumatera, Indonesia. The study was carried out in January till December 2014. The research result showed that same physical and chemical parameters had changed significantly following burning compared to natural condition.
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    SERAPAN HARA N, P, K TANAMAN PADI SAWAH DENGAN PEMBERIAN PUPUK BOKASHI DAN NPK ORGANIK PADA TANAH ULTISOL
    (2014-05-22) Zahrah, Siti
    This research was conducted in the Experimental Field, Faculty of Agriculture, Riau Islamic University and Soil Laboratory, BPTP Riau Province from October 2008 to February 2009. The research aim to study the effect of bokashi and NPK organic fertilizer to N, P, K uptake of rice in Ultisol with SRI (System of Rice Intensification).The experimental with Completely Randomized Design for Factorial 4 x 4 were used. The first factor was bokashi fertilizer addition, consisting of four levels (0, 10, 20, 30 ton ha-1) and second factor was organic NPK fertilizer addition, consisting of four levels (0, 200, 400, 600 ha-1). The result of research indicates that: (1) Interactian effect of treatment was significant to N, P, K uptake; (2) The best treatment was addition of bokashi (30 ton ha-1) and organic NPK fertilizer (600 kg ha-1), with uptake of N (371 mg/plant), P (102 mg/plant), K (128 mg/plant