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Maize is one of the world's food crops besides wheat and rice, which is strategic to increase production. Ultisol is a type of soil spread across Indonesia with a land area distribution of 45,794,000 ha and has the potential to be used to increase corn crop production. This study aimed to elucidate the effect of the combination of coal fly ash (CFA) and chicken manure (CM) on P uptake and growth of maize grown on an Ultisol. The CFA doses applied were 0, 10 and 20 t ha-1 of coal fly ash, while the CM doses applied were 0, 10 and 20 t ha-1 of chicken manure. Observations included soil pH, total P, available P and P uptake by maize. The results of the study showed an increase in soil pH, but still showed a value below 5,5. The addition of coal fly ash and chicken manure as much as 20 t ha-1 provided the highest P availability and showed the highest P nutrient uptake value by corn crops. The application of coal fly ash and chicken manure can increase the availability of P better than without the addition of chicken manure. But, the application of coal fly ash up to 20 t ha-1 also inhibited the growth of maize by marking a decrease in the results of measuring the dry weight and height of maize plants.

This study aimed to investigate research trends related to socio-scientific issues (SSI). The SSI articles analysed were from highest-rating five science education journals with the highest impact ratings, published between 2011 and 2022, including "Science Education" [SE], "Journal of Research in Science Teaching" [JRST], "Science and Education" [S&E], "International Journal of Science Education" [IJSE], and "Research in Science Education" [RSE]. A total of 87 selected relevant SSI articles were analysed to determine research types, research topics, research sample groups, research sites, and authors with the most citations. According to the research findings, IJSE articles are the most widely published articles compared to other articles of similar journals. It is revealed that the most discussed issues in those articles of IJSE are argumentation and decision-making, followed by the nature of science. Pupils in middle and high schools constitute the largest sample groups. The continent that has been widely selected as research sites is European continent. Meanwhile, the country with the most research sites is the United States. The data collection tool most frequently used in the research is interview. S&E's "Nature of Science," "Scientific Inquiry," and "Socio-Scientific Issues Arising from Genetics: A Pathway to Developing a Scientifically Literate Citizenry" articles are the most cited articles. Challenges such as addressing efficacy, emotion, and attitude remain noticeably unexplored in SSI studies. Furthermore, exploratory studies on SSI for early childhood education.