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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Jurnal Bios Logos JURNAL AGRONIDA International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) PERTANIAN TROPIK
Irfandri
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Medicine & Pharmacology

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Identification the Causes of Diseases Caused by Fungi and the Intensity of Their Attacks on Shallots (Allium ascalonicum L.) in Bungaraya Village, Bungaraya Sub-district, Siak district Irfandri; Ali, Muhammad; Khavifah, Alviatul
Jurnal Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1153.177 KB) | DOI: 10.32734/jopt.v9i1.8891

Abstract

The demand of shallots that increase are not balanced with their productions especially in Riau. One of the main cause of low productivity is the attack of nuisance plant organism. The research aims to analyze the diseases that are caused by fungi and the intensity of their attacks on Shallots in Bungaraya Village, Bungaraya Sub District, Siak Regency. The research is done by using an exploration method; observing the diseases attacks intensity in field and observation; isolation and purification of shallots’ fungi, identification of fungi’ isolate on shallots. The intensity observation of diseases attack in field is done by diagonal method by determining the 5 points of samples randomly, then observing the kind of diseases that are found base on the symptoms and their intensity of attacks. The Identification of disease cause Fungi isolate observed the characteristic of macroscopic and microscopic mushroom. The result shows that the early diagnosis of diseases in the field on shallots in Bungaraya Village, Bungaraya Sub District, Siak Regency is withered fusarium diseases that is caused by A. porri fungi. The attack intensity of withered fusarium diseases is 80,51% and the attack intensity of purple spot diseases is 2,85%
Korelasi dan sidik lintas beberapa varietas jagung manis pada berbagai dosis abu TKKS di lahan gambut Irfandri; Deviona; Masliana
JURNAL AGRONIDA Vol. 10 No. 2 (2024): Jurnal Agronida
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/jag.v10i2.15832

Abstract

Produksi jagung manis di Riau mengalami fluktuasi akibat perubahan luas lahan panen. Perluasan areal tanam ke lahan gambut menjadi salah satu solusi peningkatan produksi jagung manis di Riau. Lahan gambut memiliki beberapa masalah, diantaranya pH rendah atau sangat masam, kapasitas tukar katiannya tinggi, sementara kejenuhan basanya rendah. Penggunaan abu tandan kosong kelapa sawit (TKKS) dan varietas unggul diharapkan dapat meningkatkan produksi jagung di lahan gambut. Penelitian bertujuan untuk mengetahui keeratan hubungan, pengaruh langsung dan tidak langsung beberapa varietas jagung manis pada berbagai dosis abu TKKS di lahan gambut. Penelitian ini dilaksanakan pada Desember 2023 hingga April 2024 dengan metode RAK faktorial. Faktor pertama varietas jagung manis (Bonanza, Kumala, Golden Boy, dan Paragon), sementara faktor kedua abu TKKS (tanpa abu TKKS; 1,5 t.ha-1; 3 t.ha-1 dan 4,5 t.ha-1). Peubah yang diamati adalah waktu mekar sempurna bunga jantan, waktu munculnya bunga betina, tinggi tanaman, diameter batang, umur panen, diameter tongkol tanpa kelobot, panjang tongkol tanpa kelobot, bobot tongkol tanpa kelobot, jumlah baris biji dan bobot tongkol per plot. Hasil penelitian menunjukkan karakter tinggi tanaman, diameter batang, umur panen, diameter tongkol tanpa kelobot, panjang tongkol tanpa kelobot, bobot tongkol tanpa kelobot dan jumlah baris biji memiliki korelasi positif dengan karakter bobot tongkol per plot. Bobot tongkol tanpa kelobot merupakan karakter yang memiliki pengaruh langsung yang paling besar terhadap karakter bobot tongkol per plot. Panjang tongkol tanpa kelobot memiliki nilai pengaruh tidak langsung yang paling besar terhadap bobot tongkol per plot melalui karakter bobot tongkol tanpa kelobot.
Identifikasi Morfologi Jamur Penyebab Penyakit Busuk Tandan Kelapa Sawit dan Uji Konsentrasi Kitosan Terhadap Jamur Tersebut Secara in Vitro Elfina, Yetti; Irfandri; Sabirunah, Aisyah; Wijayanto, Dimas; Herhadi Solihin; Iswandi; Harahap, Rizki Bintang Ramadhan
JURNAL BIOS LOGOS Vol. 14 No. 3 (2024): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.v14i3.56213

Abstract

Fruit bunch rot disease on oil palms can cause a decrease in oil palm productivity in Riau Province. An alternative to controlling oil palm bunch rot disease can be using an organic fungicide, namely chitosan. Research aims to identify the causes of oil palm bunch rot disease and test the effect of chitosan concentration in inhibiting this fungus in vitro. The treatments in this study were several concentrations of chitosan (K) consisting of: K0 = Chitosan 0 g.l-1; K1 = Chitosan 2.5 g.l-1; K2= Chitosan 5 g.l-1; K3 = Chitosan 7.5 g.l-1; K4 = Chitosan 10 g.l-1. The chitosan application was analyzed statistically using variance based on the F test at the 5% level using the SPSS application. Research results The cause of oil palm bunch rot disease in Pongkai Village, District XIII Koto Kampar, Kampar Regency, Riau is Marasmius palmivorus based on its morphology. Providing concentrated chitosan able to inhibit the growth of Marasmius palmivorus in vitro. Chitosan concentrations of 2.5 g.l-1, 5 g.l-1, 7.5 g.l-1, 10 g.l-1 able to inhibit the growth of the fungus Marasmius palmivorus with respective inhibitions of 36.52%, 45.68%, 50.55 %, 64.16%, The higher the chitosan concentration, greater the inhibition of fungal growth that occurs.
Analisis Sifat Kimia Ultisol Setelah Pemberian Kompos Solid dan Fly Ash Batubara Idwar; Nelvia; Irfandri; Lubis, Nursiani; Veronica, Stevany
Jurnal Ilmu Tanah dan Lingkungan Vol 27 No 1 (2025): Journal of Soil Science and Environment
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.27.1.1-6

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh pemberian kompos solid dan fly ash batubara terhadap perbaikan sifat kimia Ultisol, serta menentukan dosis terbaik dalam aplikasinya. Tanah Ultisol yang dikenal bermasalah dengan keasaman tinggi, rendahnya bahan organik, dan ketersediaan unsur hara memerlukan pendekatan khusus untuk optimalisasi. Penelitian dilakukan secara eksperimental menggunakan rancangan acak lengkap (RAL) faktorial dengan 12 kombinasi perlakuan, yaitu empat taraf dosis kompos solid (0 t.ha-1, 2,5 t.ha-1, 5 t.ha-1 dan 7,5 t.ha-1) dan tiga taraf dosis fly ash (0 t.ha-1, 3 t.ha-1 dan 6 t.ha-1), masing-masing dengan tiga ulangan. Tanah yang telah di aplikasikan perlakuan di inkubasi selama dua minggu, lalu kemudian dianalisis sifat kimia tanahnya. Hasil penelitian menunjukkan bahwa kombinasi kompos solid dan fly ash secara signifikan meningkatkan sifat kimia Ultisol, termasuk peningkatan pH tanah, penurunan nilai Al-dd, serta peningkatan kandungan P-tersedia, C-organik, N-total, kapasitas tukar kation (KTK), dan K-total. Kombinasi dosis 7,5 t.ha-1 kompos solid dan 6 t.ha-1 fly ash memberikan hasil terbaik, menghasilkan tanah dengan pH 5,15, peningkatan P-tersedia hingga 23,70 ppm, serta peningkatan KTK ke kategori tinggi. Penggunaan kombinasi ini terbukti efektif untuk memperbaiki kualitas Ultisol sehingga lebih mendukung pertumbuhan tanaman.
PRINCIPAL DEVELOPMENT OF CERTIFIED TEACHERS TO ENHANCE THE QUALITY OF LEARNING IN BABAHROT DISTRICT ELEMENTARY SCHOOLS, SOUTHWEST ACEH REGENCY Irfandri; Khairuddin; Bahrun
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 3 No. 11 (2024): OCTOBER
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v3i11.581

Abstract

Certified teacher development is assistance or a series of efforts carried out by school principals towards certified teachers in conducting professional competence improvement to enhance the quality of education. The purpose of this research is to determine the implementation of principal's coaching for certified teachers in improving the quality of education, including: planning; implementation; follow-up, and obstacles. This research was conducted qualitatively with a case study research design. Data collection techniques included interviews, observations, and documentation. Data validity checking techniques included more thorough observations and triangulation testing. Subjects in this study were school principals and certified teachers. The findings of the research are as follows: (1) Academic supervision planning begins at the beginning of the academic year with a work meeting involving the school principal and certified teachers. The coaching program includes supervision, training, and technical guidance. The coaching focus includes: lesson plan supervision, RPP monitoring, learning process, and assessment of learning outcomes; training to improve teachers' competencies in IT; (2) Implementation is carried out with coaching approaches conducted directly and indirectly. The coaching pattern is divided into two, namely academic and non-academic. The academic coaching pattern includes two activities, namely classroom visits and observations, while the non-academic coaching pattern is carried out through personal guidance and group guidance; (3) Follow-up in coaching uses coaching techniques in individual coaching activities as a follow-up to academic supervision activities, with the aim of making teachers aware of their potential so that they realize that their weaknesses can be maximized through their own potential; (4) Principal's time constraints in coaching activities due to heavy workloads, limited certified teachers' competencies in IT, frequent changes of school principals, inadequate facilities and infrastructure, and limited BOSP fund budgets in conducting training and technical guidance.
Co-Authors , Deviona, , Bahrun Harahap, Rizki Bintang Ramadhan Herhadi Solihin Idwar Iswandi Khairuddin Khavifah, Alviatul Lubis, Nursiani Masliana MUHAMMAD ALI Nelvia Nelvia Sabirunah, Aisyah Veronica, Stevany Wijayanto, Dimas Yetti Elfina