Perubahan Beberapa Sifat Fisika-Mekanika Akibat Lintasan Pengolahan Tanah Dengan Traktor Poros-Dua Pada Beberapa Lahan Miring Dan Dampaknya Terhadap Hasil Kedelai

The research aimed to investigate how far increasing frequency of tractor traffic tillage on slopy ground could deteriorate land stability and soil productivity has been carried out by observing and analyzing the changes of soil physical-mechanical properties underneath wheel tracks of a 2-WD tractor, at Andisols Order Soil. The experiment was conducted at the experimental field of Sare, gampoeng Aceh Village, Sub-province Aceh Besar, Aceh Province, from April up to September 2009. The altitude is 445 m above sea level. Research method employed, encompassing: (1) variance analysis due to factorial split-plot random design, to observe the effect of the treatments on soil productivity as indicated by soybean plant (Gycin max L.). The design consisted of three levels of treatments of land slope as the main plots, where: k1 = 0 -5 percent (relatively flat), k2 = 6 -10 percent (rather slopy), dan k3 = 11-15 percent (slopy/critical), and six levels of treatments of traffic tillage frequency as split plots, where: l0 = no traffic, l1 = one time traffic, l2 = three times traffic, l3 =  five times traffic, l4 = seven times traffic, and l5 = nine times traffic, each at two replications, respectively; and (2) regression and correlation analysis that was used to observe the relation of  traffic tillage frequency and changes of soil physical-mechanical properties as indications of land stability and productivity changes. Data observed were: soil bulk density, total porosity,  stability index of soil aggregates, soil permeability,  moisture content, soil consistency, soil plasticity, soil cne index, soil shear strength, and land productivity indicated by yield components of soybean plant, i.e.; root length, root weight, and yield of soybean plant. Results of the research generally indicated that maximum percentage of soil physical-mechanical changes occurred in k1 to k3 at l2 was tolerable for its soil stability index was greater than 30 in which the yield of soybean – relatively low though, varied at the local level within 0.6-1.9 tonnes a hectare. Obtained from variance analysis the yield of soybean interacted significantly at l0-l5 as well as at k1-k3. Quantitatively, the results showed that the changes of  soil physical-mechanical properties as well as growth components and yield of soybean were significantly different at increasing frequency of tillage traffic and land slopes. While qualitatively, obtained from regression-correlation analysis the above indication showed polynomial relations of a reliability R2 of  0.96 to 1.00 for yield of soybean plant and stability index of soil aggregates at increasing frequency of traffic tillage of l0-l5  in the three land slopes of k1-k3.

The Environment-Based Learning to Improve Students Achievement on the Concepts of Spermatophyte Diversity

The objective of the study is to evolve student achievement on the concept of spermatophyte diversity through environment-based learning. The study was conducted at MAN Rukoh Banda Aceh by implementing environment-based learning through Pre-test and Pos-test group. The population was students of class X year 2013/2014 consisting of 6 parallel classes. The sample was Class X-1 consisting of 28 students.  Data was analysed persentage and t-test. The results showed that there was significant improvement of students achievement (t-count t-table, or 2,499 2.051).  It can be concluded that there was significant increases in student achievement by implementing environment-based learning on the concept of spermatophyte diversit

Potensi Pengembangan Sistem Irigasi Pompa Tenaga Surya untuk Sawah Tadah Hujan di Pulau Simeulue

Abstrak. Teknologi sistem irigasi pompa tenaga surya memiliki prospek yang sangat baik untuk masa depan bidang pertanian khususnya sektor pangan. Teknologi ini sangat murah untuk jangka panjang dan  juga sederhana  sehingga mudah dibuat dan dimodifikasi oleh siapa saja.  Irigasi pompa tenaga surya tidak memerlukan operator untuk mengoperasikannya, hanya diperlukan sekali-kali pengecekan dan pengontrolan. Manfaat utama yang akan didapatkan dari pengembangan teknologi irigasi pompa tenaga surya ini adalah menjaga kelestarian lingkungan hidup karena tidak menghasilkan polusi udara sehingga dapat menekan peningkatan global warming. Teknologi ini termasuk dalam jenis teknologi green energy. Berepara indikator yang perlu diperhatikan dalam pengembangan sistem irigasi tenaga surya, diantaranya: (i) kemiringan yang sesuai untuk sistem irigasi tenaga surya; (ii) radiasi matahari yang sesuai untuk irigasi tenaga surya; (iii) potensi air tanah. Lokasi penelitian ini terletak di Desa Situbok Kecamatan Tepah tengah Kabupaten Simeulue. Hasil pengamatan dan pengukuran menunjukkan bahwa tingkat penyinaran matahari di Desa Situbok rata-rata sebesar 43,75 %.. Disamping itu terdapat pula potensi air tanah dangkal di daerah Situbok dengan kedalaman antara 5 – 10 meter. Data ini menunjukkan bahwa daerah ini layak untuk pengembangan sistem irigasi tenaga surya

Penerapan Pendidikan Karakter Peduli Lingkungan Melalui Metode Inkuiri Terhadap Sikap Dan Perilaku Siswa Pada Materi Pencemaran Dan Kerusakan Lingkungan Di SMP Negeri 6 Banda Aceh

Penelitian ini bertujuan untuk mengetahui peningkatan hasil belajar dan sikap siswa serta hubungan sikap siswa dan hasil belajar siswa dengan penerapan pendidikan karakter peduli lingkungan melalui metode inkuiri pada materi pencemaran dan kerusakan lingkungan di SMP Negeri 6 Banda Aceh. Metode yang digunakan adalah eksperimen dengan jumlah sampel 25 siswa, untuk mengetahui aspek pemahaman (kognitif) menggunakan Ngain dan uji t, sedangkan untuk mengetahui hubungan antara pemahaman dan sikap, serta sikap dan perilaku digunakan uji korelasi Product Moment pada taraf nyata= 0,05. Hasil penelitian pada kelas eksperimen diketahui bahwa pada aspek kemampuan kognitif siswa (nilai) dalam pemahaman konsep terjadi peningkatan Korelasi pemahaman dan sikap siswa memiliki hubungan yang cukup. Korelasi sikap dan perilaku memiliki hubungan yang sangat kuat. Kesimpulan dari penelitian ini adalah penerapan pendidikan karakter peduli lingkungan dengan menggunakan metode inkuiri dapat meningkatkan pemahaman dan menyebabkan perubahan sikap dan perilaku siswa sehingga menjadi sadar dan peduli lingkungan pada konsep pencemaran dan kerusakan lingkungan di SMP Negeri 6 Banda Aceh. Kata Kunci: Pendidikan Karakter, Metode Inkuiri, Sikap dan Perilaku This study aims at determining the increase of students’ learning outcomes and attitudes, and also the relations between students’ attitudes and students’ learning outcomes after implementating environmental care character education through inquiry method in the concept of pollution and environmental damage at SMPN 6 Banda Aceh. This study used experimental method with the sample of 25 students. The improvement analysis was using N-gain and t-test, To determine the relationship between understanding and attitudes, and the attitudes and behavior of the students, the researcher analyzed the data by using product moment correlation on the level of significant 0.05. The results obtained by the experimental class students noted that the aspect of cognitive ability of students (grades) in understanding the concept was increased. The correlation between understanding and attitudes of the students have enough relationship. Meanwhile, the correlation between attitudes and behaviors have a very strong relationship. The conclusion of this research were the implementation of environmental care character education through inquiry methods can improve the understanding of students toward the concept and lead to changes in attitudes and behavior. Students become aware of and concerned about the environment in the concept of pollution and environmental damage. Keywords: Character Education; Inquiry Method; Student Attitudes; Behavio

Analisis Sifat Fisika Tanah Akibat Lintasan dan Bajak Traktor Roda Empat

Abstrak. Pengolahan tanah sangat penting dalam pengendalian pemadatan tanah sebagai tindakan yang menentukan kelanjutan usaha tani pada lahan kering. Tujuan penelitian ini adalah untuk mengetahui perubahan sifat fisika dan mekanika tanah akibat penggunaan traktor dengan menggunakan bajak dan tanpa bajak pada uji lintasan traktor serta mengetahui performansi traktor pada pengolahan tanah. Untuk itu perlu dilakukan penelitian lebih lanjut tentang uji lintasan dan performansi traktor roda empat terhadap analisis sifat fisika dan mekanika tanah pada lahan kering.  Penelitian ini dilaksanakan Juni sampai Agustus 2011, dengan menggunakan metode Rancangan Petak Terbagi (RPB) pola faktorial yang terdiri dari 2 faktor. Faktor yang diteliti adalah dan bajak. Dengan demikian diperoleh 6 kombinasi perlakuan, dan setiap perlakuan dilakukan 3 kali ulangan, sehingga terdapat 18 satuan unit percobaan. Dari hasil penelitian menunjukkan bahwa, pengaruh lintasan dan bajak secara interaksi berpengaruh nyata terhadap kadar air tanah dengan nilai tertinggi terdapat pada perlakuan tanpa dilintasi dengan bajak (20,33 %), berpengaruh sangat nyata terhadap plastisitas dimana nilai tertinggi terdapat pada perlakuan 3 kali lintasan  dengan bajak (32,33 %). Faktor bajak berpengaruh sangat nyata terhadap permeabilitas, bobot isi, kadar air, porositas dan plastisitas tanah. Faktor lintasan hanya berpengaruh sangat nyata terhadap permeabilitas, bobot isi, dan porositas, sedangkan kadar air dan plastisitas tidak berpengaruh nyata.Analysis of Soil Physical to Flash and Plow of Four Wheeled TractorAbstract. Soil tillage is very important in controlling soil compaction as a decisive action of sustainable farming on dry land. Hence, it was needed to do a research in trail and performance of a four-wheeled tractor on physical and mechanical characteristics of dry land soil. The objectives of this experiment were to study the changes of physical and mechanical characteristics of soil due to uses of a tractor with and without a plow on a tractor trail test and to reckon tractor performances on tillage preparation. The study was conducted from June to August 2011, using a Split Plot Design with a factorial pattern, consisting of two factors. Factors studied were(1) trail, consisting of no trail, 1 xtrail, and 3 xtrails (2) plow, consisting of without plow and with plow. Therefore, there were six combinations, and each treatment was repeated 3 times, so that there were 18 experimental units. Results showed that trail and plow exerted a significant interaction on soil water content with the highest value in the combination of no trail with plow (20,33%), exerted a highly significant interaction on plasticity with the highest value found in a combination of 3 trails with plow (32,33%), while exerted no significant interaction on the other variables. Plow exerted highly significant effects on permeability, bulk, water content, porosity and soil plasticity. Trail exerted highly significant effects on permeability, bulk, and porosity, but exerted no significant effect on water content and plasticity

Prediksi Potensi Air Tanah untuk Optimasi Sawah Tadah Hujan dalam Menunjang Ketahanan Pangan

Yasar et al, 2017. Prediction of Ground Water Potential for Optimization of Rainfed Rice Field in Supporting Food Security. JLSO 6(2):170-175.In Simeulue Island, that has the existed paddy field and generally of that is  rainfed. Recently, to irrigate the paddy field with that percentage is expected enough by natural meet of the necessity of paddy field by receiving the potential precipitation. However, rising of the climate change has caused paddy field activity is not fully runned by only utilizing the precipitation and utilizing the surface water, as irrigatiom water resource is not possible because of geological difficulty. This article aims to find a breakthrough related to the problem of irrigation water insufficiency through utilization of natural resource potency in Simeuleu Island. Presenting is descriptively done using primary data by way of field measurement and literature review to obtain a beneficiary of groundwater as irrigation water resource. Data acquiring in this research uses geoelectrical method by setting the Wanner-Schlumberger configuration of Resistiviti meter ARES. Data were obtained from one spread that was east-west oriented by having 460 m spread length and 20 m spacing interval. The coordinate of spread is at initial point N 02°25’14.2â€/E 96°18’12.2†and at final point N 02°25’43.9â€/E 96°18’27.1. Based on the 2D resistivity cross section shows that Situbok village (STB) is generally obtained a low resistivity value which is 2-100 Ωm in range and dominantly expected as alluvium. Low resistivity value can be estimated as a conductive layer (aquifer) which commonly consists of groundwater. On the cross section of resistivity value, the conductive layer is the layer which has the resistivity value less than 16 Ωm and laterally and vertically is existed at 240-360 m and 45-94 m, respectively

Kompaksi tanahp pada lahan miring

xii+194hlm.;20c

Tanah dan Pengolahan

xvi.163 hal.;ill.;22 c

Kompaksi tanah pada lahan miring

xii+194hlm.;21c

Analisis efisiensi usaha tani kelapa sawit pola perusahaan intirakyat perkebunan (pir-bun) lokal di kabupaten Aceh Barat

x+43hlm.;29c