Article Per Year (5 Year)
p-Index From 2019 - 2024
0.817
P-Index
This Author published in this journals
All Journal INSPIRAMATIKA Indiktika : Jurnal Inovasi Pendidikan Matematika Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) Jurnal Bioindustri (Journal of Bioindustry) Jurnal Agrotropika
Usmadi Usmadi
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Energy Environmental Science Mathematics

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
PENGARUH POLA CURAH HUJAN TERHADAP PRODUKSI KOPI: STUDI DI SATU PERKEBUNAN DI BANYUWANGI Rudy Erwiyono; Rully Yuniarta Yacob; Usmadi Usmadi
JURNAL AGROTROPIKA Vol 14, No 1 (2009): Jurnal Agrotropika V14 No 1 2009
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (138.487 KB) | DOI: 10.23960/ja.v14i1.4227

Abstract

Study on the effect of rainfall pattern on the coffee yield has been carried out at one of government-owned estate companies in Banyuwangi district, East Java. The study was conducted by multiple linier regression analysis approach of rainfall elements on the coffee production. The results showed the following figures. Rainfall pattern significantly affected the production of the coffee plants. In general, it was shown that the effect of rainfall pattern on the coffee production with statistical analysis approach of multiple linier regression of the study showed that the following rainfall elements, i.e. wet months, rainfall of the previous year, and dry months of the previous year, would always appear as the dominant factors determining the production of the coffee plants, in the blocks of plants (each block of plants has its own or the same planting year) as well as in afdeling (the blocks as a whole or a unite), in which the study was carried out (as a note, a plantation or estate company usually has some afdelings). Each element of rainfall tended to have similar direction or regression coefficient vector in every assessment, but different magnitude supposed to be the effect of local conditions of the land. The equations performed from the multiple linier regression analysis have precision to predict ranging from 86-91%.Keywords: Rainfall pattern, wet months, dry months, coffee production.
PENGARUH PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE FORMULATE SHARE LISTEN CREATE TERHADAP PEMAHAMAN KONSEP MATEMATIS SISWA Usmadi Usmadi; Sarah Ramdantini; ergusni ergusni
Indiktika : Jurnal Inovasi Pendidikan Matematika Vol 3, No 2 (2021): Indiktika : Jurnal Inovasi Pendidikan Matematika
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/indiktika.v3i2.5590

Abstract

ABSTRAK Pemahaman konsep matematis siswa SMP Negeri 5 Padangpanjang belum berkembang secara optimal. Salah satu penyebabnya, guru belum melibatkan siswa secara aktif dalam proses pembelajaran. Untuk mengaktifkan siswa dalam proses pembelajaran dan meningkatkan kemampuan pemahaman konsep matematis siswa salah satunya dengan menerapkan  model pembelajaran kooperatif tipe formulate-share-listen-create (FSLC). Tujuan penelitian ini adalah untuk mengungkapkan ada tidaknya pengaruh model pembelajaran kooperatif tipe formulate-share-listen-create terhadap kemampuan pemahaman konsep matematis siswa. Jenis penelitian ini adalah penelitian kuasi eksperimen, dengan one grup pretest-posttest design. Sampel ditarik berdasarkan teknik random sampling, sampel yang terpilih yaitu siswa kelas VII.3 SMPN 5 Padangpanjang dengan jumlah sampel sebanyak 29 orang. Penelitian dilaksanakan pada semester genap tahun pelajaran 2019/2020. Data dikumpulkan melalui tes dan kemudian dianalisis dengan menggunakan uji t sampel berpasangan. Simpulan hasil analisis data  bahwa setiap indikator kemampuan pemahaman konsep matematis siswa meningkat secara signifikan. Melalui uji t pada taraf kepercayaan 95% diperoleh kesimpulan terdapat pengaruh penerapan model pembelajaran kooperatif tipe FSLC terhadap kemampuan pemahaman konsep siswa.
KAJIAN PRODUKTIVITAS DAN KUALITAS KEDELAI VARIETAS BALURAN BERDASARKAN KETINGGIAN TEMPAT PENANAMAN [PRODUCTIVITY AND QUALITY STUDY OF BALURAN VARIETY SOYBEAN BASED ON GROWING LOCATION ALTITUDE] Joko Sudibya; Usmadi Usmadi
AGRITROP Vol 12, No 2 (2014): Agritrop: Jurnal Ilmu-Ilmu Pertanian
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/agr.v12i2.709

Abstract

Kedelai  Baluran  adalah  salah  satu  varietas    unggul  hasil  peneliti  Universitas  Jember  yang  dilepas pemerintah Republik Indonesia dengan SK Menteri Pertanian Nomor 275 tahun 2002. Varietas  tersebut berdaya hasil tinggi (2,5-3,5 Mg ha-1), berbiji besar (13-17 g/100 butir) dan berumur pendek (umur panen 80 hari setelah tanam). Penelitian dilakukan untuk mengkaji produktivitas dan kualitas    kedelai varietas Baluran yang ditanam di tiga lokasi dengan variasi ketinggian tempat. Lahan  penelitian adalah  sawah dan lahan kering yang disawahkan. Sifat kimia tanah yang dianalisis meliputi pH (H2O), C-organik, P2O5, Kalium (K), Calsium (Ca), Natrium (Na), Magnesium (Mg), Kapasitas Tukar Kation (KTK), Kejenuhan Basa (KB) dan populasi rhizobia. Parameter yang diamati meliputi   tinggi tanaman, jumlah polong setiap tanaman,  produktivitas potensial/hektar, berat biji/tanaman dan berat biji/ 100 butir serta kualitas biji untuk pangan (kadar protein,  lemak,  abu,  air dan  karbohidrat).  Hasil penelitian menunjukan: (1) sifa kimia tanah bervariasi (pH H2O rata-rata 6,5 , kadar C-organik sangat rendah hingga rendah dengan rata-rata 1,00 %, N total rendah hingga sedang dengan rata-rata 0,19%, P tersedia sangat rendah hingga rendah dengan rata-rata 13,46 ppm, KTK rendah hingga tinggi dengan rata-rata 21 me/100g dan KB rendah hingga tinggi dengan rata-rata 47,77% dan rata-rata populasi rhizobia 8,56), (2) keragaan tanaman bervariasi (tinggi tanaman 40,28 – 49,09 cm, jumlah polong/ pohon 27,50 – 63,67, produktivitas potensial 2,04 – 5,60 ton/ha, berat biji/tanaman 7,72 – 18,01 gram, berat biji/100 butir 14,15 – 16,71 gram) dan (3) kualitas biji varietas Baluran untuk bahan agroindustri pangan tidak kalah dengan kedelai impor. Kata Kunci : produktivitas, kualitas, keragaan tanaman.
PENGEMBANGAN MODUL BERNUANSA ISLAMI DALAM PEMBELAJARAN MATEMATIKA PADA MATERI STATISTIKA UNTUK PESERTA DIDIK SMA KELAS XI IPA Usmadi Usmadi; Iftitahurrahmah Iftitahurrahmah; Ergusni Ergusni
INSPIRAMATIKA Vol 8 No 1 (2022): Inspiramatika: Jurnal Inovasi Pendidikan dan Pembelajaran Matematika
Publisher : Program Studi Pendidikan Matematika FKIP Universitas Islam Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/inspiramatika.v8i1.2968

Abstract

ABSTRACT This research aims to produce teaching materials in the form of mathematics learning modules with Islamic nuances. Islamic modules are a teaching material that combines mathematics with religious science. This research is development research (Research Development). The research method is using four D (4-D). This model consists of 4 stages but in this study only 3 stages are defined ( define ), design (design) and development (develop). The type of data used is qualitative data obtained from teacher interviews and observation sheets regarding the practicality of modules. Quantitative data is obtained from the results of module validation, and the practical response questionnaire of learners. The results of this study are Islamic Mathematics Learning Modules in Statistics material. The modules developed were piloted at SMAN 2 Padangpanjang. The results of the trial showed the results that the Islamic mathematics learning module developed was valid with a percentage of 72.3% and practical with a percentage of 87.13%. Practical value is obtained from observations by observers, response questionnaire sheets by students and interview sheets by mathematics teachers. Keywords: Modules, Islamic Concepts, Islamic mathematics learning
PENGARUH BIO-SLURRY DAN FOSFOR TERHADAP PERTUMBUHAN DAN HASIL BUNGA KOL (Brassica oleracea L.) DATARAN RENDAH Mia Ayu Oktaviani; Usmadi Usmadi
JURNAL BIOINDUSTRI (JOURNAL OF BIOINDUSTRY) Jurnal Bioindustri: VOL. 1 NO. 2 (2019)
Publisher : Universitas Trilogi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31326/jbio.v1i2.304

Abstract

Cultivation of cauliflower with bio-slurry and phosphorus fertilizer was done as an effort to improve soil fertility to increase growth and yield of cauliflower. The study was conducted to determine the effect of bio-slurry with phosphorus fertilizer on growth and yield of lowland cauliflower. The experiment was carried out at Agrotechnopark of Jember University screenhouse from February to May 2018. The research method used a Randomized Block Design (RBD) with split plot enviromental design on 3 levels of bio-slurry factor and 4 levels phosphorus factor was repeated 3 times. The first factor was liquid bio-slurry consisting of no bio-slurry; 500 ml bio-slurry / plant; 1000 ml of bio-slurry / plant. The second factor was phosphorus fertilizer (TSP) consisting of 0 g / plant; 1.5 g / plant; 3 g / plant; 9 g / plant. The experimental results showed that the interaction between the bio-slurry dose and phosphorus fertilizer had a significant effect on the yield and quality of the flowers except for the fresh weight of the flower. The treatment of TSP fertilizer affects growth except for chlorophyll content and total leaf area. The bio-slurry treatment can increase the fresh weight of cauliflower.Keywords:cauliflower, bio-slurry and phosphorus
PENGEMBANGAN MODUL BERNUANSA ISLAMI DALAM PEMBELAJARAN MATEMATIKA PADA MATERI STATISTIKA UNTUK PESERTA DIDIK SMA KELAS XI IPA Usmadi Usmadi; Iftitahurrahmah Iftitahurrahmah; Ergusni Ergusni
INSPIRAMATIKA Vol 8 No 1 (2022): Inspiramatika: Jurnal Inovasi Pendidikan dan Pembelajaran Matematika, June 2022
Publisher : Program Studi Pendidikan Matematika FKIP Universitas Islam Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/inspiramatika.v8i1.2968

Abstract

This study aims to produce teaching materials in the form of Islamic-nuanced mathematics learning modules. The Islamic nuanced module is a teaching material that combines mathematics with religious knowledge. This research is a research development (Research Development). The research method is using four D (4-D). This model consists of 4 stages but in this study only 3 stages were carried out, namely defining, designing and developing. The type of data used is qualitative data obtained from teacher interviews and observation sheets regarding the practicality of the module. Quantitative data were obtained from the results of module validation, and students' practical response questionnaires. The module developed was tested at SMAN 2 Padangpanjang. The results of the validity test of the Islamic nuanced mathematics learning module by the validator obtained a value of 72.3% with valid criteria and the practicality results obtained a value of 87.13% with practical criteria. Practical values are obtained from observations by observers, questionnaire responses by students and interview sheets by mathematics teachers. Based on the results of the study, it can be concluded that the Islamic nuanced module in mathematics learning in statistics material for high school students in class XI science is valid and practical.
Co-Authors ergusni ergusni Iftitahurrahmah Iftitahurrahmah Joko Sudibya Mia Ayu Oktaviani Rudy Erwiyono Rully Yuniarta Yacob Sarah Ramdantini