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Scientific Timeline
Published by Universitas Nahdlatul Ulama Purwokerto
ISSN : -     EISSN : 27763935     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Scientific Timeline is focusing on the field of science and technologies that are studied in Universitas Nahdlatul Ulama Purwokerto. Agriculture, Farm, Fisheries and basic sciences of Maths and Biology are some of them with addition of Food Technology and Agricultural Biosystem Engineering. This journal is scoping articles from reports of analysis, studies, research, to application of theories, material development, and also some reviews.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 5 Documents
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Search results for , issue "Vol. 2 No. 2 (2022)" : 5 Documents clear
UPAYA PENINGKATAN KANDUNGAN MINYAK ATSIRI PADA BAWANG MERAH VARIETAS TUK-TUK DENGAN PERLAKUAN BERBAGAI MACAM DOSIS PUPUK KIMIA PABRIKAN Rifqi Adisonda; Bagus Nur Rochman; Bayu Handoko
Scientific Timeline Vol. 2 No. 2 (2022)
Publisher : UNU Purwokerto

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Abstract

The aims of the study are to determine the effect of various manufactured chemical fertilizers on the increase of the essential oil content in Tuk-tuk and to determine which treatment is best to increase the essential oil content of this particular variety of shallots. The study used a non-factorial randomized block design with three treatments, and each was repeated nine times. The treatments' dosages were B1: ZA 50kg/ha; Urea 25kg/ha; SP36 250kg/ha and KCl 25kg/ha, B2: ZA 100kg/ha; Urea 50kg/ha; SP36 300kg/ha and KCl 50kg/ha, B3: ZA 150kg/ha; Urea 100kg/ha; SP36 350kg/ha and KCl 100kg/ha. The growth and yield observation variables in this study were the number of leaves (fruit), plant height (cm), leaf area (cm2), tuber diameter (cm), fresh plant weight (g), dry plant weight (g), fresh tuber weight (g), dry tuber weight (g), essential oil content (%). The data obtained were analyzed using the F-test, and then the data showed a significant effect proceeded with the DMRT test at a level of 5%. The results of the F-test on the shallots' observed growth and yield variables were not significantly affected by the treatment of manufactured chemical fertilizer. Meanwhile, B3K5 treatment with B3 dose: ZA 150kg/ha; Urea 100kg/ha; SP36 350kg/ha, and KCl 100kg/ha were the best treatments to increase the essential oil content in the Tuk-tuk variety.
PERTUMBUHAN DAN SINTASAN LOBSTER AIR TAWAR (Cherax quadricarinatus) PADA SALINITAS YANG BERBEDA Denny Indra Yudhistira
Scientific Timeline Vol. 2 No. 2 (2022)
Publisher : UNU Purwokerto

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This experiment aims to find the data and information on suitable salinity for the growth and survival rate of freshwater lobster (red claw). The research was conducted in indoor station Kalikidang, Sokaraja, Banyumas, for 28 days. Twelve aquariums were used in this research, and the dimensions were 60x40x40 cm. In this experiment, a complete randomized design was used. The treatments applied were of different salinity, i.e., A: 0 ppt, B: 5 ppt, C: 10 ppt, and D: salinity of 15 ppt, with three replicates, respectively. The average size of the juvenile freshwater lobsters used in this experiment was 5±0,82 cm carapace width and 4,49±1,34 g body weight. During the rearing, the crabs were fed with commercial artificial feed and given twice a day, with a dosage of 15% of total body weight. The determined parameters were length, body weight, and survival rate during the experiment. The result showed that the treatment of 0-5 ppt salinity was significantly different in the growth of length and body weight and survival rate of freshwater lobster reared in the aquarium (P<0,05). The salinity of 0-5 ppt was the optimum salinity for the growth and survival rate of the red claw.
LAJU SEDIMENTASI DI PERAIRAN KURAU, KABUPATEN BANGKA TENGAH Rismawati; Aditya Pamungkas; Mohammad Agung Nugraha
Scientific Timeline Vol. 2 No. 2 (2022)
Publisher : UNU Purwokerto

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Abstract

The estuary of the Kurau Watershed (DAS) has domestic activities. The problem that commonly occurs in river mouths is the emergence of sediment, which causes disruption of water flow upstream and can cause flooding. Kurau waters have considerable water resources, but it is also decreasing year on year. This study aimed to determine the sedimentation rate, TSS, and the type of sediment texture in Kurau waters, Central Bangka. Sedimentation rate data was obtained using a sediment trap. Analysis of TSS (Total Suspended Solid) and sediment texture using gravimetric and pipette methods. The sedimentation rate in Kurau waters is not high based on weight, namely 0.03-0.14 mg/cm²/day, and volume with a value range of 0.13-0.58 cm/day. The concentration of TSS on the surface of Kurau waters based on PP no. 22/2021 has not passed the seawater quality standard with a TSS concentration of 0.03-0.04 mg/L. Kurau waters have various types of sediment texture, namely sand with a percentage ranging from 6.54-78.33%, dust with a percentage of 14.72-45.74%, and clay with a percentage of 6.94-47.72%. The sedimentary textures in Kurau waters are dusty clay, loamy sand, and loamy clay.
PERAMALAN JUMLAH PENDUDUK DESA PANDAK TAHUN 2022 DENGAN METODE EXPONENTIAL SMOOTHING Ita Maemanah; Noor Sofiyati
Scientific Timeline Vol. 2 No. 2 (2022)
Publisher : UNU Purwokerto

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Abstract

Penduduk merupakan sasaran sekaligus pelaksana pembangunan penduduk di Indonesia. Pertumbuhan penduduk yang pesat akan mempunyai efek ekonomi, sosial, dan politik serta pendidikan, kesehatan, dan kesejahteraan, kualitas lingkugan tempat tinggal. Desa Pandak merupakan salah satu desa di Kecamatan Sumpiuh dengan luas wilayah 2792 km2 . Untuk membantu perencanaan pembangunan di desa Pandak yang akan datang dapat menggunakan metode peramalan penduduk. Berdasarkan penelitian diperoleh data jumlah penduduk mengalami kenaikan dari tahun ke tahun, sehingga metode yang digunakan untuk meramalkan jumlah penduduk Desa Pandak tahun 2022 adalah metode double exponential smoothing. Tujuan dari perhitungan nilai mean absolute error (MAE) dan mean square error (MSE) adalah meminimumkan kesalahan meramal, maka nilai alpha ( α ) yang dipilih adalah 0,05 dengan peramalan jumlah penduduk Desa Pandak pada tahun 2022 adalah 3320 orang. Hasil peramalan ini dapat digunakan sebagai acuan Pemerintah Desa Pandak untuk menentukan pembangunan dan peningkatan sumber daya manusia Desa Pandak 2022.
Pengaruh Pengaturan Jarak Tanam dan Defoliasi Terhadap Pertumbuhan dan Hasil Jagung Manis (Zea Mays Saccharata Sturt.) Bagus Nur Rochman; Bayu Handoko; Gita Anggraeni
Scientific Timeline Vol. 2 No. 2 (2022)
Publisher : UNU Purwokerto

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Abstract

Sweet corn was people’s favorite among the public because it had a sweet taste and high nutritional value. Limited land ownership encourages efforts to increase plant populations without reducing yields by using narrow spacing and defoliation treatments. The research aimed to determine the best spacing for high plant density, the best defoliation technique, and the effect of interaction between spacing treatments and defoliation techniques on sweet corn plants. The results showed that spacing at high density could increase the production and productivity of sweet corn was 20 x 40 cm. Defoliation of sustain 2 and 3 could increase the cob volume. Spacing and defoliation treatments did not interact because the spacing was still optimal.

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