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All Journal Journal of Tropical Soils EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Jurnal Pendidikan
Surono, .
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Mathematics

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POTENSI KIJING LOKAL (Pilsbryoconcha exilis) SEBAGAI BIOFILTER TERHADAP PENURUNAN KADAR SIANIDA (CN) Surono, .; Nisvera, Mela; Rahayu, Sata Yoshida Srie
Ekologia: Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Vol 23, No 1 (2023): Ekologia : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/ekologia.v23i1.6232

Abstract

Local gravestone (Pilsbryconcha exilis) is an animal that lives in fresh waters such as rivers, lakes, and other waters. The survival of local mussels is very high so that in large quantities it can be used as a water purification process due to pollutants and heavy metal pollution. Cyanide is commonly used to extract gold ore, waste that is wasted in waterways contains a lot of CN compounds so that it can pollute the living things in it. The purpose of this study was to determine the potential of local gravestone (Pilsbryoconcha exilis) as a biofilter to decrease cyanide (CN) levels. This study consisted of three treatments and one control (without KCN) with one replication. The number of mussels in each treatment amounted to 10 tails with the concentration of cyanide used was 0.04; 0.07; and 0.1 ppm. The results of this study indicate that local gravestone can affect the decrease in cyanide levels in the experimental aquarium media. In the treatment with KCN concentration of 0.07 ppm there was a decrease in cyanide levels of 0.011 mg/L and the treatment with 0.1 ppm KCN concentration decreased cyanide levels of 0.025 mg/L. The survival rate of the mussel during the research process was 100%, because there were no local dead mussels found. The best daily growth rate was in treatment 3 with 0.1 ppm KCN concentration of 2.3%.
Effectiveness of Bio-organic Fertilizer Formulas to Increase Productivity of Upland Rice and Dehydrogenase Activity in Lampung Acid Upland Surono, .; Santosa, Edi; Subowo, .; Elsanti, .; Khamdanah, .
JOURNAL OF TROPICAL SOILS Vol. 20 No. 2: May 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i2.85-93

Abstract

Development of acid upland in Indonesia still has constraints. To solve the constraint, environmental friendly technology by using organic matter and beneficial microbes is necessary. This study aimed to determine the effectiveness of bio-organic fertilizer formulas for increasing productivity of upland rice plant in acid upland. This study used a randomized block design with 11 treatments using un-treatment as a control and some combination of NPK and bio-organic fertilizer. Each treatment was repeated three times, the size of plot was 5 m x 5 m. Upland rice var. Situ Patenggang was used as a plant indicator, with cultivication spacing of 40 cm x 15 cm. Combination treatment of NPK and bio-organic fertilizer increased population of P-solubilizer and N-fixer bacteria, plant height and tillers. Treatments of NPK-rec, ¾ NPK-rec and combination of ½ NPK-rec, ¾ NPK-rec and NPK-rec with both bio-organic formulas gave the weight of dried unhusked upland rice equal was 1.92 to 2.56 t ha-1 significantly higher compared to the control. The highest RAE was generated by treatment of NPK-rec combined with Bio-Organic Formula II about 137%. Bio-Organic Formula II could increase the growth and productivity of upland rice var. Situ Patenggang and could increase the efficiency udeof ½ NPK fertilizer dosage recommendations or equivalent with 125 kg urea, SP-36 100 kg, and 35 kg KCl ha-1 and increased the dehydrogenase activity.
Upaya Meningkatkan Prestasi Belajar Matematika dengan Model Pembelajaran Auditory Intellectually Repetition (AIR) Surono, .
JURNAL PENDIDIKAN Vol 28 No 3 (2019): November
Publisher : Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/jp.v28i3.486

Abstract

Penelitian ini bertujuan untuk meningkatkan prestasi belajar matematika melalui model pembelajaran Auditory Intellectually  Repetition (AIR) pada siswa kelas VII H SMP Negeri 1 Bendosari semester I tahun pelajaran 2015/2016. Penelitian ini adalah Penelitian Tindakan Kelas yang dilakukan di kelas VII HSMP Negeri 1 Bendosari semester I tahun pelajaran 2015/ 2016 yang berjumah 32 siswa. Teknik pengumpulan data yang digunakan adalah tes, observasi, dan dokumentasi. Tahap-tahap analisis data dalam penelitian ini adalah pengumpulan data, reduksi data, penyajian data, dan penarikan kesimpulan. Indikator keberhasilan adalah nilai rata-rata tes siswa sekurang-kurangnya 80,0 dan banyak siswa dengan nilai di atas kriteria ketuntasan minimal (KKM) yaitu 70,0 mencapai ? 85%.Berdasarkan penelitian yang telah dilakukan, dapat disimpulkan bahwa penerapan model pembelajaran Auditory Intellectually Repetition (AIR) dapat meningkatkan prestasi belajar matematika pada siswa Kelas VII H semester I SMP Negeri 1 Bendosari tahun pelajaran 2015/2016. Hal ini dapat ditunjukan dengan meningkatnya nilai matematika siswa dari 71,2 meningkat menjadi 80,2? 80,00 dan persentase ketuntasan belajar siswa dari 62,5% meningkat menjadi 93,75% ? 85%.
Co-Authors . SUBOWO Edi Santosa Elsanti, . Khamdanah, . Nisvera, Mela SATA YOSHIDA SRIE RAHAYU