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INDONESIA
Jurnal Teknologi Pertanian Andalas
Published by Universitas Andalas
ISSN : 14101920     EISSN : 25794019     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT
Jurnal Teknologi Pertanian Andalas (JTPA) adalah publikasi ilmiah di bidang ilmu pengetahuan dan teknologi pertanian. Artikel yang dimuat berupa hasil penelitian terkait ilmu pengetahuan dan teknologi pertanian yang belum pernah dipublikasikan di media lain (kecuali dalam bentuk abstrak atau karya ilmiah akademik atau dipresentasikan dalam seminar atau konferensi). JTPA diterbitkan dua kali setahun pada bulan Maret dan September oleh Fakultas Teknologi Pertanian Universitas Andalas. Cakupan artikel Jurnal Teknologi Pertanian Andalas adalah: Teknologi Pertanian, Teknik Pertanian, Teknologi Hasil Pertanian, Pertanian Agro-Industri, Teknologi Pangan dan Gizi.
Arjuna Subject : -
Articles 312 Documents
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ANALISIS PERUBAHAN KARAKTERISTIK CURAH HUJAN DAN DAMPAKNYA TERHADAP MUSIM TANAM PADI DI KECAMATAN KOTO TANGAH KOTA PADANG Tjandra, M. Agita; Yanti, Delvi; Zawiyah
Jurnal Teknologi Pertanian Andalas Vol 29 No 2 (2025)
Publisher : Universitas Andalas

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Abstract

Climate change affects rainfall patterns, causing shifts in the onset of seasons that impact water resource availability, thereby disrupting crop growth, yields and agricultural production. Rainfall variability, both spatially and temporally, can lead to changes in the planting and harvesting seasons of crops, which in turn affect the food security of a region. The objectives of this study were to identify rainfall characteristics in Koto Tangah District, identify the rice planting season in Koto Tangah District, and analyze the effect of changes in rainfall characteristics on the rice planting season in Koto Tangah District. The research employs a combination of quantitative and qualitative methods, presented in a descriptive and explanatory manner. The analysis to observe changes in rainfall characteristics was conducted over three periods: quarterly, semi-annualiy, and annually. The rainfall characteristics analyzed were minimun, maximum, average and total rainfall. After analyzing rainfall characteristics, changes in rainfall characteristics were integrated with the rice planting season in Koto Tangah District, Padang City. Based on the analysis results, it was conducted that there were changes in rainfall characteristics in Koto Tangah District, Padang City, however farmers did not use rainfall as the primary reference for determining the rice planting time. Koto Tangah District already has a good technical irrigation network, enabling it to provide water for rice fields throughout the year. In addition to being supported by good technical irrigation, Koto Tangah District has relatively high rainfall every year. Therefore, changes in rainfall characteristics do not affect the rice planting season in Koto Tangah District.
PENDUGAAN MUTU BIJI KEDELAI BERDASARKAN SIFAT AKUSTIK PADA VARIASI TINGKAT KADAR AIR Agustoria, Khairil; Andasuryani
Jurnal Teknologi Pertanian Andalas Vol 29 No 2 (2025)
Publisher : Universitas Andalas

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Abstract

This study aims to estimate the quality of soybean seeds based on their acoustic properties at different moisture content levels as a rapid and non-destructive evaluation method. An experimental setup was developed using a sorting machine equipped with a microcontroller and an LM393 sound sensor to capture acoustic signals generated from the impact of soybean seeds on a reflector plate. The tested moisture contents were 10.65%, 13.65%, 16.65%, 19.65%, and 22.65%, in accordance with the SNI 01-3922-1995 standard. The results indicated that moisture content significantly affected the acoustic response of soybean seeds. As the moisture content increased, the detected acoustic voltage decreased. At the lowest moisture level (10.65%), the average amplitude was 3.617 mV, whereas at the highest moisture level (22.65%), it decreased to 3.135 mV. This reduction is attributed to the increase in seed elasticity (Modulus of Elasticity, MOE) caused by water absorption, which elevates the sound absorption coefficient and consequently reduces the propagation velocity of sound waves within the seeds. Statistical analysis confirmed that the differences in acoustic values among moisture levels were significant (P < 0.05). These findings suggest that acoustic properties can serve as an effective indicator for assessing soybean seed quality based on moisture content variation. Keywords: acoustics; amplitude; moisture content; soybean.

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