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Analisis Variasi Suhu Pemanasan Serbuk Batu Basalt Sebagai Bahan Pengisi Ordinary Portland Cement Terhadap Kuat Tekan Beton Rajiman Rajiman; Vita Listari
Jurnal Rekayasa Sipil dan Desain Vol 7, No 4 (2019): Edisi Desember 2019
Publisher : Jurnal Rekayasa Sipil dan Desain

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Utilization of basalt scoria stone as one of the building materials that can be one of thealternatives to limestone which has been known as a cement maker and utilizes the availability ofabundant basalt, especially in Lampung which has these natural resources. This research is toanalyze the basalt stone powder and analyze the optimum content at the temperature variation ofthe most effective mixture of basalt stone powder to produce compressive strength of concrete.The research method uses experimental methods at the Bandar Lampung University laboratory.The specimens used were cylinders with a diameter of 10.16 cm and a height of 20cm totaling 63specimens using the DOE method. There are 6 types of mixtures, namely at a temperature of800˚C there are 2 mixes of 3% and 7% basalt stone powder, a temperature of 1200˚C there are 2mixes of 3% and 7% basalt stone powder, and at a temperature of 1600˚C there are 2 mixtures of3% and 7% basalt stone powder. Compressive strength testing is performed at the age of concretetesting 7, 14, and 28 days.The results of the study show that the addition of heated basalt stone powder can increase thecompressive strength of concrete. The compressive strength results in a mixture of temperaturevariations included in the planned compressive strength. The optimum compressive strength valueof 28 days of testing occurred on 3% concrete mix of basalt stone powder at a temperature of1600˚C that is equal to 392 kg / cm².Keywords: Concrete, Basalt Stone and compressive strength

PENGARUH PENAMBAHAN SERBUK BATU BASALT PADA KOMPOSISI CAMPURAN BETON MENGGUNAKAN ORDINARY PORTLAND CEMENT (OPC) DITINJAU DARI KUAT TEKAN BETON Rajiman Rajiman; Ihda Aulia
TAPAK [Teknologi Aplikasi Konstruksi] : Jurnal Program Studi Teknik Sipil Vol 9, No 1 (2019): November 2019
Publisher : Prodi Teknik Sipil Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/tp.v9i1.1035

Beton merupakan material konstruksi yang sangat sering digunakan dalam konstruksi. Campuran beton dengan tambahan serbuk batu basalt sebagai bahan penambah semen untuk meningkatkan kuat tekan beton. Basalt adalah batuan leleran dari gabro, mineralnya berbutir halus, berwarna hitam. Gunungapi di Indonesia umumnya menghasilkan batuan basal dalam bentuk lava maupun piroklastika. Batuan ini banyak digunakan untuk pengeras jalan, pondasi, bendungan, konstruksi beton, dan lain-lain.Tujuan penelitian ini untuk mengetahui pengaruh serbuk batu basalt pada campuran beton normal. Metode perancangan campuran yang digunakan yaitu Metode ACI dan Metode DOE untuk trial mix, dan selanjutnya dipilih Metode DOE dari hasil trial mix untuk digunakan dalam penelitian. Persentase Serbuk Batu Basalt yang akan digunakan yaitu 0%, 1%, 3%, 5%, 7%, dan 9% dari berat semen. Benda uji yang akan digunakan dalam penelitian ini adalah benda uji silinder 10cm x 20cm untuk yang normal dan untuk yang persentase 11cm x 20cm (memakai benda uji peralon) dengan jumlah benda uji 54 buah. Umur pengujian yang direncanakan sampai pada umur 28 hari. Kuat tekan tertinggi pada umur 28 hari yang dihasilkan pada beton dengan campuran serbuk batuk basalt 7% yaitu 396,36 kg/cm². Hasil penelitian ini beton yang dikatagorikan kedalam beton kelas III adalah beton dengan campuran serbuk batu basalt 1%, 3%, 5%, 7% dan 9% pada umur 28 hari.

PENGARUH PEMBENAH TANAH TERHADAP SIFAT FISIKA TANAH DAN HASIL BAWANG MERAH PADA LAHAN PASIR PANTAI BUGEL KABUPATEN KULON PROGO Rajiman Rajiman; Prapto Yudono; Endang Sulistyaningsih; Eko Hanudin
Agrin Vol 12, No 1 (2008): Agrin
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.agrin.2008.12.1.80

Penelitian bertujuan untuk: 1) mengetahui pengaruh pembenah tanah terhadap perubahan sifatfisika tanah dan hasil bawang merah di lahan pasir pantai; dan 2) mencari bahan alternatif pembenahtanah di tanah pasir pantai. Penelitian menggunakan Rancangan Acak Kelompok Lengkap Faktorialterdiri atas 3 faktor. Faktor pertama adalah jenis tanah dengan takaran 30 t/ha (T) yaitu Grumusol (T1)dan Lumpur (T2). Faktor kedua adalah jenis bahan organik dengan takaran 20 t/ha (B) yaitu pupukkandang sapi (B1) dan blotong tebu (B2). Faktor ketiga berupa dosis limbah karbit (A) yangdibedakan menjadi 3 aras yaitu 0 t/ha (A0), 1 t/ha (A1) dan 2 t/ha (A2). Sebagai kontrol digunakantanah pasir tanpa pembenah tanah. Parameter yang diamati meliputi tekstur, berat volume, berat jenis,porositas total, kadar lengas pF 2,54, pF 4,2, kapasitas air tersedia, berat segar, berat kering, beratkering oven dan diameter umbi bawang merah. Hasil penelitian menunjukkan bahwa jenis tanah,bahan organik dan limbah karbit di tanah pasir pantai nyata meningkatkan jumlah fraksi lempung,debu, porositas, kadar lengas, menurunkan BV, BJ dan meningkatkan berat segar, berat kering, beratkering oven dan diameter umbi bawang merah dibanding kontrol. Penggunaan jenis tanah, bahanorganik dan limbah karbit tidak nyata mempengaruhi hasil bawang merah. Lumpur, blotong danlimbah karbit dapat dimanfaatkan sebagai salah satu alternatif pengganti grumusol dan pupuk kandangdi tanah pasir.Kata kunci : bawang merah, lahan pasir, pembenah tanah ABSTRACTThe objectives of study were to 1) study the effect of soil conditioner on soil physics and shallotyield in coastal sandy land, 2) find out soil conditioner alternative in coastal sandy land. The researchwas conducted by complete randomized design, which consists of three factors. First factor was soiltypes at level of 30 t/ha (T) : grumusol (T1) and mud (T2). Second factor was organic matter types atlevel of 20 t/ha: manure (B1) and sugarcane (B2). Third factor was waste of carbida (A), 0 t/ha (A0),1 t/ha (A1), 2 t/ha (A2) and control. The observation of parameters was texture, bulk density, particledensity, porosity, water contents of pF 2,54; pF 4,2; available water capasity, fresh weight, dry weight,oven dry weight and diameters of bulbs. The result showed that the soil types, organic matter typesand waste of carbida in coastal sandy land significantly increased on clay and silt fraction total,porosity, water contents, fresh weight, dry weight, oven dry weight and diameters bulbs and reducedto bulk density, particle density, sand fraction. The effect of the soil types, organic matter and waste ofcarbida were not significant on the shallots yield. Mud, sugarcane “blotong” and waste of carbide canbe used as alternative substittution of grumusol and litter of livestock in coastal sandy land.Key words: shallot, sandy land, soil conditioner

DAMPAK PENYIMPANGAN IKLIM TERHADAP PERUBAHAN KARAKTERISTIK HUJAN DI PATUK, GUNUNGKIDUL (EFFECT OF CLIMATE DEVIATION ON CHANGE OF RAINFALL CHARACTERISTIC IN PATUK, GUNUNG KIDUL) Rajiman Rajiman
Jurnal Ilmu-Ilmu Pertanian Vol 1, No 1 (2005): Jurnal Ilmu Ilmu Pertanian
Publisher : Politeknik Pembangunan Pertanian Yogyakarta-Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55259/jiip.v1i1.336

The Climate had response of importance on plant growth and production. The climate elements to effecting to plant is rainfall (distribution and total). Rainfall of effecting to reckoning has distribution in agriculture. The objective of this research is : to look of effect El Nino and La Nina on characteristic and change of rainfall in Patuk Gunung Kidul.This study used descriptive design to facta and fenomena response. Data collected from rainfaal station in Putat (1980-2002), then analized an interprestation of climate deviation.The result research are : The rainfall ofter 1990 heigher from old years. Effict from El Nino of strong showed dry season leight duration (2-5 decade). Effect of ln Nina on wet season of leight duration (3 decade month of Oktober - 2 decade month of Juni).Keyword : Rainfall, , El Nino, La Nina, Deviation of climate

ANALISIS PRODUKTIVITAS DAN STABILITAS BAWANG MERAH DI KABUPATEN BANTUL (ANALYSIS ON SHALLOTS PRODUCTIVITY AND STABILITY IN BANTUL DISTRICT) Rajiman Rajiman
Jurnal Ilmu-Ilmu Pertanian Vol 17, No 1 (2013): Jurnal Ilmu Ilmu Pertanian
Publisher : Politeknik Pembangunan Pertanian Yogyakarta-Magelang

This study aimed to design development commodities the shallot in an effort to improve its productivity and stability. Research carried out on August – October 2009, in Bantul District. Data analysis methods used Magic Box Methods. The principle of the magic box by using the parameters of the productivity and stability. Productivity data of shallot which used the rayon in 2004 – 2008. The results showed the productivity (PR) of shallot in Bantul District, categorized as low if the productivity of <76,7 kw / ha, moderate (76,7 ≤ PR<127,86 kw / ha) and high if the PR ≥ 127,8 kw/ha. Stability categorized low if the value CV> 20%, moderate (10-20%) and high if <10%. Results of analysis showed that the magic box at Sanden Rayon has the same stability and productivity, ie productivity of medium and high stability (Box 4. The rayon of Srandakan, Kretek, Pundong and Pandak has productivity and stability are being (Box 5). The Rayon of Imogiri and Bambanglipuro has productivity of medium and low stability (Box 6). Based on the analysis of a magic box, empowerment is done through two approaches according to the resulting box. In general empowerment activities with research and extension. Empowerment of Box 4 include: 1) the increased of land fertilizer 2). the use of variety. Empowerment of box 5 and 6 include : 1) the increased of land fertilizer 2). the use of variety and 3) manajeman of cultivation.Keywords: productivity, stability, empowerment

PENGARUH PEMUPUKAN ANORGANIK TERHADAP KUALITAS UMBI BENIH BAWANG MERAH (THE EFFECTS OF ANORGANIC FERTILIZER TO SEED BULB QUALITY OF THE SHALLOTS) Rajiman Rajiman
Jurnal Ilmu-Ilmu Pertanian Vol 6, No 1 (2010): Jurnal Ilmu Ilmu Pertanian
Publisher : Politeknik Pembangunan Pertanian Yogyakarta-Magelang

This research was aimed to study of effects of anorganic.fertilizer to seed bulb quality of shallots at coastal sandy land. The research was conducted with completelly block randomized design, which consists of two factors. The first factor was Urea+ZA level : 1/3, 2/3 and 1 dosages. The seconds factor was phosphor+potassium level : 1/3, 2/3 and 1 dosages. The fertiltzer recomendation were Urea of 150 kg.ha-1, ZA of 250 kg.ha-1, TSP and KCL of 15A kg.ha-1. To control was used land no fertilizer. The observation of parameters were bulb diameter, bulb hight, bulb color, bulb particle weight, solubility, total, content of N, P and K. The data were analysis by variances and orthogonal contras 5%. The results showed the usage anorganic fertilizer at coastal sandy land increased seed bulb quality of shallots. The increasing Urea+ZA and phospor+potassium level did not significant on seed bulb quaiity of shallot.Keywords: shallot, fertilizer, seed quality, seed.

PENGARUH PEMUPUKAN NPK TERHADAP HASIL BAWANG MERAH DI LAHAN PASIR PANTAI (THE EFFECT OF NPK FERTILIZER ON SHALLOT YIELD AT COASTAL SANDY LAND) Rajiman Rajiman
Jurnal Ilmu-Ilmu Pertanian Vol 5, No 1 (2009): Jurnal Ilmu Ilmu Pertanian
Publisher : Politeknik Pembangunan Pertanian Yogyakarta-Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55259/jiip.v5i1.300

This research was aimed to study the effect of NPK fertilizer to shallots yield at Bugel area' the research was conducted with completely randomized design consisting two factors. The first factor was nitrogen (N) proportions: l/3, 2/3 and dosages. The second factor was phosphor*potassium proportions: I/3, 2/3 and t dosages. The fertilizer recommendation were 250 kg.ha-1 Urea, 150 kg.ha-1 ZA, TSP and KCL. For comparison purposes; the control plot did not use any fertilizer. The parameters of observation were bulb total, the fresh and dry weight, harvest index and bulb diameter. The data were analyzed by variances and orthogonal contrast 5%. The results showed that there was no significant interaction between nitrogen and phosphor + potassium, level, except bulb total and harvest index. The application of nitrogen and phosphor + potassium was not significant on the yield of fresh bulb, dry bulb and bulb diameter. Keywords : Shallot, Fertilizer, Yield.

PENGEMBANGAN USAHA JAHE MERAH (Zingiber offcinale var rubrum) SEBAGAI MODEL PEMBERDAYAAN MASYARAKAT (STUDI KASUS DI VISTA AGRO MEDIA D.I. YOGYAKARTA) William Nichodemust Richard; Gunawan Yulianto; Rajiman Rajiman
Jurnal Ilmu-Ilmu Pertanian Vol 28, No 2 (2021): Jurnal Ilmu Ilmu Pertanian
Publisher : Politeknik Pembangunan Pertanian Yogyakarta-Magelang

This study aims to determine the application of innovative technology, potential market opportunities and appropriate community empowerment models in the development of ginger cultivation business at Vista Agro Media. The study was conducted from January 2021 to July 2021 in Tlogoadi ,Mlati, Sleman Regency. The research method used is descriptive. The selection of locations and techniques for taking informants in the study was carried out purposively. Data collection techniques using triangulation and FGD (Focus Group Discussion). Data analysis was carried out by tabulating data based on the results of benchmarking, namely comparing aspects of cultivation innovation technology and aspects of potential market opportunities in similar businesses. The results of the analysis of the study show that (1) the application of innovation technology in Vista Agro Media that has been optimal in red ginger cultivation is the provision ofplastic uv or paranet and the provision of organic fertilizer in the form of rabbit urine and compost. (2) Potential and market opportunities at Vista Agro media are strategic locations, products offered are always available, low prices. (3) The empowerment model implemented to support the increase in red ginger production is to collaborate with the community and invite them to cultivate red ginger so that when harvested the results can be sold to Vista Agro Media and both parties can benefit from each other. The counseling activity carried out was how to seed red ginger in polybag media to KWT Umbulasri together. The results of the counseling showed that there was an increase in the knowledge aspect by 96%, then the attitude aspect by 98.66% and the skill aspect measured by direct practical observation and supported by the post test, by 98.66%. Keywords: technological aspect, benchmarking, red ginger plant, potential market opportunities.ABSTRAK: Kajian ini bertujuan untuk mengetahui penerapan teknologi inovasi, potensi peluang pasar dan model pemberdayaan masyarakat yang tepat dalam pengembangan usaha budidaya tanaman jahe merah di Vista Agro Media. Kajian dilaksanakan pada bulan Januari 2021 sampai dengan Juli 2021 di Tlogoadi, Mlati, Kabupaten Sleman. Metode penelitian yang digunakan yaitu deskriptif. Pemilihan lokasi dan teknik pengambilan informan dalam kajian dilakukan secara purposive. Teknik pengumpulan data menggunakan triangulasi dan FGD (Focus Group Discussion). Analisis data dilakukan dengan cara tabulasi data berdasarkan hasil benchmarking yaitu membandingkan aspek teknologi inovasi budidaya dan aspek potensi peluang pasar pada usaha yang sejenis. Hasil analisis kajian menunjukkan bahwa (1) penerapan teknologi di Vista Agro Media yang sudah optimal dalam budidaya jahe merah ialah pemakaian plastik uv atau paranet serta pemberian pupuk organik berupa urine kelinci dan kompos. (2) Potensi dan peluang pasar pada Vista Agro media ialah lokasi yang strategis, produk yang ditawarkan selalu tersedia, harga yang murah. (3) Model Pemberdayaan yang dilaksanakan guna mendukung peningkatan produksi jahe merah ialah menjalin kerja sama dengan masyarakat dan mengajak mereka membudidayakan jahe merah sehingga saat panen hasil dapat dijual pada Vista Agro Media dan kedua belah pihak dapat saling diuntungkan. Kegiatan penyuluhan yang dilakukan ialah cara pembibitan jahe merah pada media polybag kepada KWT Umbulasri secara bersama-sama. Hasil penyuluhan tersebut menunjukkan adanya peningkatan aspek pengetahuan sebesar 96%, lalu aspek sikap sebesar 98,66% dan aspek keterampilan diukur dengan pengamatan praktik secara langsung dan di dukung post-test yaitu 98,66%. Kata kunci: Aspek teknologi, benchmarking, potensi peluang pasar, tanaman jahe merah.

Pengaruh Dosis Pupuk Kandang Sapi Terhadap Produksi dan Mutu Benih Kacang Panjang (Vigna sinensis L.) Ika Nur Fitriana; Rajiman Rajiman; Ananta Yekti
AGROTECH Research Journal Vol 3 No 2 (2022)
Publisher : Universitas Boyolali

Penelitian ini bertujuan untuk mengetahui pengaruh dosis pupuk kandang sapi yang optimal untuk meningkatkan produksi dan mutu benih kacang panjang (Vigna sinensis L.) varietas RKP 15. Penelitian dilaksanakan pada bulan Februari sampai dengan bulan Mei 2022 menggunakan Rancangan Acak Kelompok (RAK) dengan 6 taraf perlakuan yaitu dosis 0 ton/ha, 5 ton/ha, 10 ton/ha, 15 ton/ha, 20 ton/ha, dan 25 ton/ha. Data penelitian dianalisis menggunakan sidik ragam (Anova) apabila berbeda nyata dilakukan uji lanjut Duncan’s Multiple Range Test (DMRT) dengan taraf 5%. Hasil analisis data menunjukkan penggunaan pupuk kandang sapi berpengaruh nyata terhadap berat 1000 butir, jumlah polong, berat polong, berat benih, produksi perplot, dan produktivitas, namun berpengaruh tidak nyata terhadap umur berbunga, daya berkecambah, keserempakan tumbuh, dan kecepatan tumbuh. Hasil benih optimal dapat dicapai pada penggunaan dosis pupuk kandang sapi 20 ton/ha dengan produktivitas 2,92 ton/ha.

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