PENGARUH KOMPOSISI MEDIA TANAM (TOP SOIL ULTISOL, PASIR DAN PUPUK KANDANG KAMBING) TERHADAP PERTUMBUHAN BIBIT PORANG (AMORPHOPHALUS MUELLERI)

This study aims to determine the effect of planting media (Top soil Ultisol, Sand and Goat Manure) on the growth of Porang (Amorphophallus muelleri) seedlings. This study used a non-factorial randomized block design (RAK). The treatment factor was the composition of the growing media which consisted of 7 levels of treatment, namely: A = Topsoil ultisol 100%, B = 100% goat manure, C = 100% sand, D = Topsoil ultisol + goat manure + sand (1 : 1: 1 : 1), E = Topsoil ultisol + goat manure + sand (1 : 2: 1), F = Topsoil ultisol + goat manure + sand (2 : 1: 1), G = Topsoil ultisol + goat manure + sand ( 1:1:2). The parameters observed were the percentage of germination, plant height, stem diameter and leaf area of the plant. Based on the results of the study, it can be stated that the composition of a mixture of topsoil ultisol, goat manure and sand has a significant effect on the growth of porang seedlings. The best growth of porang seedlings was found in the composition of topsoil, sand and goat manure with a ratio of 1: 1: 2 (E). The application of goat manure and sand on top soil ultisol had a significant effect on plant height, stem diameter and leaf area, but had no significant effect on the percentage of seedling growth

Effect of Problem-Based Learning Model on Learning Motivation in Quality Control Course

This study is to evaluate the effectiveness of problem-based learning in increasing student learning motivation in quality control course at college in Lubuk Pakam, North Sumatra Province. The method approach used is quantitative research involving 40 college students as respondents. This research was conducted by providing teaching using problem-based learning, learning model for one semester, and then evaluating student learning motivation. Hypothesis testing uses simple regression analysis. The result showed that the implementation of problem-based learning model significantly increased students' learning motivation in quality control course. Students showed improvement in active engagement in learning, deeper conceptual understanding, and development of problem-solving skills. The findings highlight the importance of interactive and student-centered learning approaches in improving learning effectiveness in higher education