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All Journal Journal of Degraded and Mining Lands Management International Journal of Science and Applied Science: Conference Series
A Widodo
Univ. Pembangunan Nasional “Veteran” Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Mathematics Physics

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Clay and organic matter applications on the coarse quartzy tailing material and the sorghum growth on the post tin mining at Bangka Island Nurcholis, M; Wijayani, A; Widodo, A
Journal of Degraded and Mining Lands Management Vol. 1 No. 1 (2013)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2013.011.027

Abstract

Artisanal mining on the island ofBangkaleaves a lot of damaged landsurfacecoveredbycoarse-sized tailings that are dominatedby thequartz mineral and it causes soil to be extremely unfertile. The objective of the present research wastounderstand the impact of the clay and organic matter(OM) applications on the tailingsforsupportingthe growth of anadaptiveplant whichis usedinthe present studyissorghum. Thestudywas conducted on the artisanal mine closure land at Pangkalpinang, theclaymaterial andcow dung were collected fromlocally near location. Land was preparedby constructingfour treatments, i.e.: control, OM + NPK, clay + OM,andclay + OM + NPK. The amendment materialswereapplied by mixing the tailing on the 30 cm wide and depth on eachplantingstripwith a distance of70 cm. Sorghumseedswere plantedwith a spacingof 20 cm. Wateringplants was done byutilizingthe waterpitat the beginning ofgerminationand plant growth. The results showed thatsorghumgrownandsurvivedonlyonemonthinthe control treatment. Sorghumgrowthis verygoodon the treatment ofclay+OM+NPK, while the othertwo treatmentsresult instuntedgrowth ofsorghum. <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 3"
Stimulating Students’ Argumentation using Drawing – based Modeling on The Concept of Ecosystem Sumarni, E N; Widodo, A; Solihat, R
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2018): International Journal of Science and Applied Science: Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (968.79 KB) | DOI: 10.20961/ijsascs.v2i1.16688

Abstract

Drawing – based modeling as learning approach, it allows students to create models based on drawing which help them to run a simulation. Students can use drawing–based modeling to learn a pair of interacting population known as predato–prey system while they usually conducted practicum using diagram of organisms. This study was to explore students’ argumentation and students’ understanding on the concept of the ecosystem. The study was conducted quasi – experimental using the matching – only post-test – only control group design. The participants consist of 60 grade 10 senior high school students in Subang, West Java. They are placed into two groups, 30 students in the experimental group and 30 students in the control group. Data was collected through argumentation test and selected response test for assessing students’ understanding. Students’ argumentation were analyzed using Toulmin’s argumentation pattern and statistical analysis. The result showed there is no significant difference between the experimental group and the control group for students’ argumentation. Most of the students are predominantly at level 2. But the coherency of arguments of the experimental group is more coherent than the control group. It means that the students in experimental group can make logical claim and supported by the correct and relevant grounds (data, warrant, and backing). The result of students’ understanding showed there is a significant mean score between the experimental group and the control group whether 72.33 for the experimental group and 62.13 for the control group
Co-Authors A Wijayani E N Sumarni, E N M Nurcholis R Solihat, R