Claim Missing Document
Check
Articles

Found 2 Documents
Search

Development of Research-Based Teaching Materials to Improve Critical Thinking Skills in the Use of Extremely Low Frequency Electromagnetic Waves to Increase Food Security Agviolita, Putri; Sudarti, Sudarti; Narulita, Erlia
BIOEDUKASI Vol 22 No. 1 (2024)
Publisher : PROGRAM STUDI PENDIDIKAN BIOLOGI FAKULTAS KEGURUAN DAN ILMU PENDIDIKAN UNIVERSITAS JEMBER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bioedu.v22i1.44121

Abstract

Critical thinking skills are needed in the 21st century, so efforts are being made to improve them, one of which is by developing research-based teaching materials, and research into the use of Extremely Low Frequency Electromagnetic waves to increase food security is currently being carried out very intensively. This research aims to describe the development of research-based teaching materials to improve critical thinking skills in the use of Extremely Low Frequency Electromagnetic waves to increase food security. This development research uses the Borg and Gall method, which consists of 10 steps. The subjects of this research were 90 students at the University of Jember. Undergraduate Physics Education students in classes A, B, and C in environmental physics courses and on material on the use of Extremely Low Frequency electromagnetic waves to increase food security. This research uses quantitative analysis. The results of this research state that research-based teaching materials are effective in improving students' critical thinking skills in the material on the use of Extremely Low Frequency Electromagnetic waves to increase food security with a score of 82.33 based on critical thinking indicators.
Pengaruh Perbedaan Biochar terhadap Kemampuan Menjaga Retensi pada Tanah Agviolita, Putri; Yushardi, Yushardi; Anggraeni, Firdha Kusuma Ayu
Jurnal Fisika Unand Vol 10 No 2 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.10.2.267-273.2021

Abstract

Kemampuan retensi tanah dapat ditingkatkan dengan membenahi stuktur tanah melalui penambahan biochar pada tanah. Hubungan pemberian biochar dengan meningkatnya retensi tanah dapat dilihat dari peningkatan penyerapan air dan pH. Ukuran pori-pori pada biochar dapat menambah ukuran pori-pori tanah yang dapat memaksimalkan penyerapan air, sehingga semakin besar pori-pori biochar maka semakin tinggi tingkat retensi tanah. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan ukuran permukaan pori-pori dan pH pada bahan baku biochar terhadap kemampuan menjaga retensi tanah sehingga dapat membantu mengembalikan kemampuan retensi tanah agar tanah tetap subur. Metode yang digunakan dalam penelitian ini adalah metode eksperimen untuk mengukur penyerapan air dengan memberi air melalui alat infus ke pot berlubang yang sudah berisi campuran biochar dan tanah, lalu mengukur pH dengan menggunkana pH for soil. Untuk mengetahui bahan baku biochar yang tepat dengan permasalahan pada tanah, maka penelitian ini menggunakan 3 biochar dengan bahan baku yang berbeda yaitu tongkol jagung, batang pepaya , tempurung kelapa. Hasil dari penelitian ini adalah campuran tanah dengan biochar tempurung kelapa yang paling banyak menyerap air, dan campuran tanah dengan biochar tongkol jagung yang memiliki pH tertinggi. Soil retention ability can be improved by improving soil structure through the addition of biochar to the soil. The relationship between biochar and increased soil retention can be seen from the increase in water absorption and pH. The size of the pores in biochar can increase the size of the soil pores which can maximize water absorption, so that the larger the biochar pores, the higher the soil retention rate. This study aims to determine the effect of differences in pore surface size and pH on biochar raw materials on the ability to maintain soil retention so that it can help restore soil retention ability so that the soil remains fertile. The method used in this research is an experimental method to measure water absorption by giving water through an infusion device into a perforated pot that already contains a mixture of biochar and soil, then measuring the pH using pH for soil. To find out the right biochar raw material with problems in the soil, this study used 3 biochar with different raw materials, namely corn cobs, papaya stalks, and coconut shells. The results of this study were the soil mixture with coconut shell biochar which absorbed the most water and the soil mixture with corncob biochar which had the highest pH.