Pengaruh Konsep Diri dan Disiplin Belajar terhadap Motivasi Belajar Peserta Didik di Sekolah Menengah Pertama Negeri 4 Palu Pada Mata Pelajaran Pendidikan Agama Islam

The purpose of this study is to find out the significant effect of self-concept on learning motivation of VII grade students in SMP Negeri 4 Palu on Islamic Religious Education subjects, (2) knowing the effect of learning discipline on learning motivation of VII grade students at SMP Negeri 4 Palu in the eyes of Islamic Religious Education subjects and (3) determine the effect of self-concept and learning discipline on learning motivation of grade VII students in SMP Negeri 4 Palu on Islamic Religious Education subjects. This study uses a quantitative approach. The population in this study were 220 class VII students of SMP Negeri 4 Palu. The sample was determined using proportional random sampling technique using a formula developed by Isaac and Michael, so that a sample of 135 students was obtained. Primary data were obtained using a questionnaire. Data analysis techniques include descriptive analysis, and regression tests using simple regression and multiple regression. The results showed that (1) There was a significant influence between self-concept on learning motivation of VII grade students in SMP Negeri 4 Palu on Islamic Religious Education subjects, with a significance level of 5%, the magnitude of the effect of self-concept variables on students' learning motivation was 0, 615 means having a high influence (2) There is a significant influence between learning discipline on learning motivation of VII grade students in SMP Negeri 4 Palu on Islamic Religious Education subjects, with a significance level of 5%, the magnitude of the effect of the discipline of learning variables on motivation student learning is 0, 565, (3) There is a significant influence between self-concept and learning discipline on learning motivation of grade VII students in SMP Negeri 4 Palu on Islamic Religious Education subjects, with a significance level of 5%, the high influence of concept variables self and discipline of learning towards learning motivation of VII grade students of SMP Nege ri 4 Palu in Islamic Religious Education subjects is 0, 615. The contribution of self-concept variables and learning discipline to learning motivation variables is R2 x 100% or 0, 6152 x 100% = 37.9%, the remaining 62.1% is determined by other variables outside of this study include the level of interest, talent, attention, parenting parents and others.

Immobilization of Nickel in Industrial Contaminated Soil Using Organic and Inorganic Amendments

Nickel (Ni) bioavailability in the soil can be alleviated by the integrated use of immobilizing agents. In the current study, it was observed that sole of combined use of biochar (BA), zeolite (ZT) and gravel sludge (GE) significantly influenced the Ni bioavailability in Ni stimulated soil compared to control. The bioavailable Ni contents were measured in DTPA, Ca(NO3)2 and extracts and soil water extract (SWE) with indicator plant red clover (Trifolium pratense L.). The impact of immobilizing agents and a bioavailable portion of Ni was assessed through physiology, growth and biochemical characters of red clover were recorded. Results showed that application of ZT significantly decreased the extractable Ni concentrations in all treatments, however, the combined use of BA and ZT significantly reduced the Ni and decreased the generation of (ROS) thus positively influence physiological, agronomic and biochemical attributes of red clover. Therefore, ZT and BA as sole or combination of both were selected the second experiment with the object to immobilize Ni in soil with both maize and sunflower as a test crop. Results revealed the treatment receiving ZT: BA with 1:3 significantly improved the growth, yield, chemical and biochemical attributes in both crops over control. Nickel-induced oxidative stress was significantly mitigated in this treatment compared to control. However, the highest decrease in uptake of Ni was observed where ZT: BA was 1:1 compared to control. Based on finds of the second study, the third study was designed with ZT: BA 1:1 selected from the previous study. Wheat (Triticum aestivum L.) grown and proline (PO) was exogenously applied according to the treatment plan. Proline acts as a stress alleviator and mitigates heavy metals stress. Proline was applied with ZT: BA 1:1 mixture to determine the efficiency of these amendments and PO to mitigate Ni stress and improvement in antioxidants activity in wheat. The finding suggested that the combined use of immobilizing agents with some stress alleviator could significantly reduce Ni bioavailability and increased the biomass, physiological and biochemical parameters. Ni induced oxidative stress was also ameliorated in wheat with ZT, BA, and PO, compared to control.