Potensi Penurunan Produksi Padi Akibat Variabilitas Curah Hujan di Kabupaten Subang Jawa Barat

Research on hazard, vulnerability, and risks of the decline in rice production due to climate change has been implemented in Subang West Java. This study aims to assess the level of hazard, vulnerability, and risks of the decline in rice production and identify areas that very high level of the decline in rice production. Materials of this study is data of climate, agroclimate, rice production, and socio-economic. Methods of this study is descriptive explanatory that using risk assessment concept where risk is a function of hazard and vulnerability. The results was showed in spatial map using GIS. The results indicate that in Subang area has experienced climate change shown by the changing patterns (trend) of rainfall, rain day, and the distribution of annual rainfall. Decreased rice harvested area above 5.2% per year occurred in Cisalak, Dawuan, Pabuaran, Patokbesi, Pagaden, and Pusakanagara. Decreased rice production over 11.2% per yeas occurred in Cisalak, Dawuan, Pabuaran, and Pusakanagara.The very high vulnerability occurred in Pabuaran.The high risks of decline in harvested area and production of rice respectively found in Patokbesi and Pabuaran. The high risk reduction in harvested area and production of rice in the region due to the disruption of water supply, growth, development, and production plants due to climate change

Nilai Pendidikan dalam Novel Kami (Bukan) Sarjana Kertas Karya J.S. Khairen: Kajian Semiotika

This study tries to analyze the importance of education in JS Khairen's book Kami (not) Bachelor of Paper. Novel excerpts in the shape of phrases and paragraphs make up the research's data. Descriptive analysis with a qualitative research type is the technique employed. JS Khairen's novel Kami (not) Bachelor of Paper contains educational qualities in accordance with Sukardi's theory, specifically divine values, mark moral, mark social, and mark cultural, according to the study's findings. Overall, moral education is the most important educational value. Following that, using Roland Barthes' semiotic analysis, the data in the form of educational value was examined for its meaning using terms like denotative meaning, meaning connotation, and meaning myth. Abstrak Penelitian ini bertujuan untuk mendeskripsikan nilai pendidikan dalam novel Kami (bukan) Sarjana Kertas karya J.S. Khairen. Data penelitian ini adalah kutipan novel yang berupa kalimat dan paragraf. Metode yang digunakan adalah deskriptif analisis dengan jenis penelitian kualitatif. Hasil penelitian ini menunjukkan bahwa dalam novel Kami (bukan) Sarjana Kertas karya J.S. Khairen terdapat nilai-nilai pendidikan menurut teori Sukardi, yaitu: nilai ketuhanan, nilai moral, nilai sosial, dan nilai budaya. Secara keseluruhan, nilai pendidikan yang mendominasi adalah nilai pendidikan moral. Setelah itu, data berupa nilai pendidikan tersebut dianalisis maknanya dengan menggunakan kajian semiotika Roland Barthes, seperti: makna denotasi, makna konotasi, dan makna mitos.This study tries to analyze the importance of education in JS Khairen's book Kami (not) Bachelor of Paper. Novel excerpts in the shape of phrases and paragraphs make up the research's data. Descriptive analysis with a qualitative research type is the technique employed. JS Khairen's novel Kami (not) Bachelor of Paper contains educational qualities in accordance with Sukardi's theory, specifically divine values, mark moral, mark social, and mark cultural, according to the study's findings. Overall, moral education is the most important educational value. Following that, using Roland Barthes' semiotic analysis, the data in the form of educational value was examined for its meaning using terms like denotative meaning, meaning connotation, and meaning myth. Abstrak Penelitian ini bertujuan untuk mendeskripsikan nilai pendidikan dalam novel Kami (bukan) Sarjana Kertas karya J.S. Khairen. Data penelitian ini adalah kutipan novel yang berupa kalimat dan paragraf. Metode yang digunakan adalah deskriptif analisis dengan jenis penelitian kualitatif. Hasil penelitian ini menunjukkan bahwa dalam novel Kami (bukan) Sarjana Kertas karya J.S. Khairen terdapat nilai-nilai pendidikan menurut teori Sukardi, yaitu: nilai ketuhanan, nilai moral, nilai sosial, dan nilai budaya. Secara keseluruhan, nilai pendidikan yang mendominasi adalah nilai pendidikan moral. Setelah itu, data berupa nilai pendidikan tersebut dianalisis maknanya dengan menggunakan kajian semiotika Roland Barthes, seperti: makna denotasi, makna konotasi, dan makna mitos

Identification of Climate Trends and Patterns in South Sumatra

South Sumatra is one of low-lying provinces in Indonesia with a vast area of peatland that is prone to peat fires and floods. Understanding climate patterns in South Sumatra is very important to anticipate the impacts of extreme weathers. This study identified the climate trends and patterns based on the daily data of temperature, rainfall and evapotranspiration obtained from 1975 to 2021 (46 years). Here, the trend and its significance were detected based on the linear regression and Mann-Kendall test approaches. Characteristics of wet/dry season (start, peak, end) were identified annually based on the 6th polynomial equation using rainfall and evapotranspiration data. The results show an increased trend of annual average temperature (0.04oC per year), rainfall (6.83 mm per year), and evapotranspiration (0.77 mm per year). Other findings reveal that the cyclic season in South Sumatra is wet season (starts from 1±30 to 163±79 Julian day), followed by dry season (from 172±152 to 273±90 Julian day), then wet season (until 244±90 Julian day). The mean excess of annual rainfall was 708 mm (593 mm and 114, respectively, for wet and dry season). Further, we found that South Sumatra experienced extreme dry season (8 times) with the longest in 2019 that lasted for 167 days in a row. As a precaution, extreme wet spells may occur in November-December, and March, whereas extreme dry seasons can be found in July-September each year

Optimalisasi Jarak Tanam Terhadap Peningkatan Produksi Hanjeli Pulut (Coix lacrima-jobi L.) pada Lahan Tidur

Utilizing idle land as agricultural land is one option that can be pursued to support national food security and independence. Indonesia has various types of alternative food commodities that have the potential to be developed on nutrient-poor land, one of which is hanjeli. Technical cultivation is needed to increase the growth and yield of hanjeli on sub-optimal land. This study aims to determine the best planting distance to increase hanjeli production on idle land. The research was conducted from October 2020 - March 2021 in Limau Manis, Padang City, West Sumatra. The materials used in this study were rice cultivar hanjeli seeds, manure (20 tons/ha) and NPK fertilizer (200 kg/ha). The experimental design used was Randomized Group Design with 3 groups and consisted of 8 plant spacing treatments (40 x 40 cm, 50 x 40 cm, 50 x 50, 50 x 60 cm, 50 x 70 cm, 50 x 80 cm, 50 x 90 cm, and 50 x 100 cm). Observation data were analyzed statistically to determine the influential treatment using the F test at the 5% level and significantly different data were tested using the Duncan’s Multiple Range Test at the 5% level. It was concluded that the spacing of 50 x 70 cm, 50 x 80 cm, 50 x 90 cm and 50 x 100 cm gave the best effect on the number of total tillers/plant, the number of productive tillers/plant, the number of seeds/plant, the percentage of filled seeds, the weight of filled seeds/plant. As for productivity, the spacing of 50 x 80 cm gave the best results

DINAMIKA TEMPERATUR EKSTREM DI NUSA TENGGARA

Penelitian ini bertujuan untuk mengetahui dinamika tren temperatur ekstrem di wilayah Nusa Tenggara dan dampaknya terhadap sektor pertanian, khususnya tanaman padi. Dengan adanya peningkatan frekuensi dan intensitas temperatur ekstrem yang mengancam produktivitas pertanian, hal ini menjadi suatu permasalahan yang harus diatasi. Metode penelitian yang digunakan adalah penelitian kuantitatif dengan menggunakan data sekunder. Data yang digunakan merupakan data harian temperatur maksimum dan minimum dari tiga stasiun meteorologi (Eltari, Sultan Muhammad Salahuddin, dan Umbu Mehang Kunda) selama 40 tahun (1983-2022). Analisis dilakukan menggunakan software RClimDex dan uji Mann-Kendall untuk mendeteksi tren dan perubahan temperatur ekstrem. Hasil penelitian menunjukkan adanya tren peningkatan temperatur ekstrem baik siang maupun malam hari di ketiga stasiun. Kenaikan temperatur ini merupakan indikasi perubahan iklim yang terjadi di wilayah tersebut. Peningkatan temperatur ini juga berdampak signifikan terhadap sektor pertanian, terutama dalam hal ketersediaan air dan produktivitas tanaman padi. Oleh karena itu, perlunya penerapan strategi adaptasi untuk mengurangi dampak negatif perubahan iklim terhadap pertanian di Nusa Tenggara, termasuk pengembangan varietas padi yang tahan panas dan manajemen irigasi yang lebih efisien

Pengaruh Pola Curah Hujan Terhadap Produktivitas Padi di Kecamatan Bukateja Kabupaten Purbalingga

Pola curah hujan sangat mempengaruhi kegiatan budidaya pertanian.  Selain itu, curah hujan seringkali menjadi faktor pembatas terhadap produksi pertanian. Tujuan penelitian adalah (a) untuk mengetahui pola curah hujan di di Kecamatan Bukateja, Kabupaten Purbalingga, (b) untuk mengetahui produktivitas padi di Kecamatan Bukateja, Kabupaten Purbalingga, dan (c) untuk mengetahui pengaruh pola curah hujan terhadap produktivitas padi di Kecamatan Bukateja, Kabupaten Purbalingga. Penelitian ini menggunakan metode survei. Data penelitian berupa data sekunder, meliputi data produktivitas padi dan curah hujan tahun 2009 – 2018 di Kecamatan Bukateja. Pengumpulan data menggunakan teknik dokumentasi. Data penelitian diolah menggunakan tabulasi dan disajikan dalam bentuk tabel dan grafik. Analisis data dilakukan secara deskriptif kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa pola curah hujan di Kecamatan Bukateja termasuk tipe monsunal. Produktivitas padi di Kecamatan Bukateja selama tahun 2009-2018 mengalami fluktuasi, dimana produktivitas padi terrendah terjadi tahun 2014 sebesar 4,9 ton/ha dan produktivitas padi tertinggi terjadi tahun 2018 sebesar 6,8 ton/ha. Pola curah hujan di Kecamatan Bukateja tidak berpengaruh terhadap produktivitas padi di Kecamatan Bukateja, Kabupaten Purbalingga.Kata-kata kunci: tipe Monsoon, pola curah hujan, produktivitas padi

Karakteristik Solusi Dekomposisi QR dalam Aljabar Max-Plus Tersimetri

Kajian aljabar max-plus tersimetri hadir dari kondisi bahwa setiap elemen pada ℝ tidak memiliki invers terhadap operasi max. Aljabar max-plus tersimetri dibentuk dari pasangan berurutan elemen-elemen di ℝ. Pembentukan aljabar max-plus tersimetri ini memunculkan kelas positif, kelas negatif, kelas nol, dan kelas himpunan baru, yakni kelas balance. Penelitian ini berfokus pada pencarian karakteristik solusi dekomposisi QR dalam aljabar max-plus tersimetri dengan beberapa entri matriks awal yang akan didekomposisi merupakan anggota kelas balance. Dekomposisi QR merupakan salah satu dekomposisi matriks, yaitu dekomposisi suatu matriks persegi panjang berukuran m × n menjadi perkalian matriks ortogonal berukuran m × m dengan matriks segitiga atas berukuran m × n. Secara umum, dekomposisi ini dapat digunakan dalam aljabar konvensional. Penelitian ini menjelaskan dekomposisi QR jika dipunyai matriks dengan entri-entri elemen balance di aljabar max-plus tersimetri.Kata Kunci: dekomposisi QR, aljabar max-plus, aljabar max-plus tersimetri, dekomposisi QR dalam aljabar max-plus tersimetr

PENINGKATAN PEMAHAMAN INFORMASI IKLIM MELALUI SEKOLAH LAPANG IKLIM (SLI) BAGI PETANI

Abstrak: Perubahan iklim berdampak pada menurunnya produksi petani melon yang disebabkan berubahnya pola tanam. Petani mengalami kesulitan menentukan waktu tanam untuk menyesuaikan dengan kondisi iklim karena kurangnya pemahaman terhadap informasi iklim. Fenomena perubahan iklim dan pemanasan global telah terjadi dan merubah pola iklim normal. Tujuan dari program pengabdian masyarakat ini yaitu untuk meningkatkan pemahaman petani melon terhadap informasi iklim. Metode yang digunakan untuk pengabdian masyarakat program sekolah lapang iklim (SLI) melalui kegiatan sosialisasi dan focus group discussion (FGD). Mitra yang terlibat dalam program pengabdian masyarakat SLI yaitu 6(enam) kelompok tani sejumlah 75 orang petani di Desa Kateng dengan konsentrasi pada komoditas golden melon. Pelaksanaan sosialisasi telah berhasil dilaksnakan dengan keterlibatan peserta yang aktif. Sosialisasi dilaksanakan sebanyak 3 (tiga) kali, dimana sossialisasi yang ketiga pelaksanaannya disesuaikan dengan waktu panen raya golden melon. Hasil kegiatan ditunjukan berdasarkan evaluasi tiga komponen: tingkat pemahaman, keberlanjutan program SLI, dan pentingnya informasi iklim. Tingkat pemahaman informasi iklim petani meningkat 25%, 99% peserta SLI mengharapkan keberlanjutan sosialisasi iklim secara rutin, dan 81% peserta menyatakan pentingnya informasi iklim. Dengan memahami informasi iklim, produktivitas petani melon kembali meningkat. Abstract:  Impact of climat change is productivity decrease of the melon farmer caused by changing of planting pattern. The farmer got problem to determine planting time as step adjust climate condition, this way caused by lack og climate information understanding. The purpose of society dedication program of climate field school is to increase the farmer understanding of climate information. In this programe used socialization and focus group discussion method. The partner has involve in society dedication program of climate field school (CFS) namely 6(six) farmer group with members 75 farmers in Kateng Village. The agriculture commodity concentration of group farmer is golden melon fruit. The socialization programe has organized, successfully. There are 3(three) time socialization, time for the third socialization justified with golden melon harvesting time. The result activity showed by three components evaluation, such as level of understanding, program sustainability, and the important thing of climate information for melon productivity. Level understanding of farmer has increase 25%, 99% participants agree with sustainability program, and 81% also agree with the important thing of climate information. Through climate information understanding has increase of melon productivity

Ketahanan Lingkungan Dan Adaptasi Sosial Dalam Konteks Perubahan Iklim Di Kabupaten Provinsi Sumatera Selatan

Climate change affects agriculture through its impact on plant growth, development and yield. Research on indications of climate change and its impact on rice production in Indonesia in South Sumatra This research aims to examine climate change and its impacts on rice production in Indonesia. This study uses data from temperature, bulk rain, agroclimate, and rice production as well as socio-economic data. Methodology This research is an explanatory descriptive study using the concept of risk assessment where risk (risk) is a function of danger (hazard) and vulnerability (vulnerability). Study results shows that in Indonesia there has been climate change with indications of increasing temperature, changes in rainfall patterns, changes in hitergraphs, and changes in Oldeman classification.

IDENTIFIKASI PERUBAHAN POLA CURAH HUJAN DAN PERIODE MASA TANAM DI LAHAN KERING UNTUK ADAPTASI PERUBAHAN IKLIM (STUDI KASUS KABUPATEN BONE, SULAWESI SELATAN)

Identification of climate change impacts on spatial and temporal rainfall pattern and length of growing period are very important for climate change adaptation strategy. Rainfed is an agro-ecosystem most sensitive to changes in rainfall patterns. Bone Regency is a center of agriculture in South Sulawesi and has considerable rainfed potentials. This study aims to identify changes of rainfall patterns and length of growing period (LGP) for paddy and upland rice in Bone Regency. Data of three rain stations with a 55-year period were used and Oldeman methods was applied to determine rainfall pattern and LGP. Data was separated in two period, period 1 (1961-1990) and period II (1991-2016). The pattern of changes were identified by comparing rainfall patterns in LGP I and II. This analysis was grouped by wet year, normal year and dry year with criteria developed by BMKG. The results of the analysis showed that the rainfall pattern and LGP had changed of which pattern of change varies between regions. The LGP of paddy in Macope were three months shorter in all years, while for upland rice were two months shorter in wet year, and 1 month in normal year. In Katumpi, the LGP of paddy fields were 2 months shorter comparing to the wet year and 1 month shorter in normal and dry year for upland rice. LGP for paddy in Cellu was lengthened 1 month in wet year and shortened 2 months in dry year for upland rice