Jurnal Visi Eksakta

Pengaruh Model Pembelajaran Problem Based Learning Berbasis Hypnoteaching Terhadap Hasil Belajar Siswa Pada Materi Cahaya

Mariana Surbakti, Indah Septa. A. Laia — Sat, 30 Jul 2022 00:00:00 +0000

This study aims to determine the effect of Hypnoteaching-based or Problem Based Learning? (PBL) learning methods on student learning outcomes on the subject of light. This type of research is a pre-experimental study with the population of this study being all students of class X MIA I. The sample in this study consisted of one class that was selected directly with the purposive technique. The research instrument used was an observation sheet on student learning activities and an objective test in the form of multiple choice which had been tested for validity. Based on the results of observations of student learning outcomes, the average pretest score was 34.86 with a standard deviation of 1.33 and the post-test average value was 84.86 with a standard deviation of 1.17. From the results through the t-test of the two samples correlated for pretest and posttest data for = 0.05 and dk = 70, it is obtained that tcount = 24.72 and ttable = 1.67, which shows tcount > ttable, then Ha is accepted and Ho is rejected. Based on the results of this study, we can conclude that there is a significant effect of the Hypnoteaching-based PBL learning model on the learning outcomes of class X MIA I students. The relationship of each variable is indicated to have a significant effect through regression test analysis with the results obtained Y = 42.6 + 0.52 X Based on the results of the correlation test with the acquisition of the value of the correlation coefficient r = 0.73 which indicates that the relationship between the two variables is strong.

Pengaruh Pemberian Tepung Daun Lamtoro (Leucaena Leucocephala) Dalam Ransum Terhadap Performan Burung Puyuh Jantan (Coturnix- Coturnix Japonica )

Tunggul Ferry Sitorus, Ester Angriani Malau — Sat, 30 Jul 2022 00:00:00 +0000

This study aims to determine the effect of giving lamtoro leaf flour (Leucaena leucocephala) on the performance of male quail (Coturnix-coturnix japonica) aged 2-8 weeks. This research was conducted in the experimental field of the Faculty of Animal Husbandry, HKBP Nommensen University in Simalingkar A Village, Pancur Batu District, Deli Serdang Regency. The research data collection took place for 8 weeks starting from October to December 2021. The experimental design used in this study was a Completely Randomized Design (CRD) with 5 treatments, namely the level of giving lamtoro leaf flour in the ration P0(0%), P1( 1.5%), P2(3%), P3(4.5%), P4(6%), where each treatment was repeated four (4) times and each treatment consisted of 10 male quails. Parameters observed were ration consumption, daily body weight gain, and ration conversion. From the results of the study, it was found that the average consumption of quail rations fed with lamtoro leaf meal for 8 weeks of the study was 9.44 grams/head/day with a range of 9.32 – 9.70 grams/head/day. The average body weight gain of quail was 1.64 grams/head/day with a range of 1.53-1.75 grams/head/day. The average conversion rate for quail was 5.11 with a range of 4.75 -5.39. The results of the variance study (ANOVA) showed that the treatment of giving lamtoro leaf flour in male quail rations had a very significant effect (P<0.01) on daily body weight gain and ration conversion, but had a significant effect (P<0.05) on ration consumption. Based on the results of this study, it is suggested that the best lamtoro leaf flour can be given at the level of 1.5% to 3%.

Kajian Komunitas Ikan Dalam Aplikasinya Bidang Ekologi Perairan

Sri Natalia Silaen — Sat, 30 Jul 2022 00:00:00 +0000

Indonesia is one of the developing countries in Asia. As a developing country, Indonesia always strives to advance development in all fields including agriculture in a broad sense. The aim of economic development is to increase and expand employment opportunities, increase income, reduce poverty and simultaneously improve people's welfare. The purpose of this research was to determine the effect of partial land area on fish production, to determine the effect of the number of seeds partially stocked on fish production, to determine the effect of land area and the number of seeds stocked together on fish production. Coastal areas have a variety of potentials, including primary food sources containing protein (especially animal protein derived from fish, shrimp and the like), oil, gas and other mineral wealth that has potential in the fields of mining, tourism, settlements and industrial development.