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All Journal Journal of Tropical Soils AGRIKA Plumula : Berkala Ilmiah Agroteknologi Journal of Degraded and Mining Lands Management Jurnal Solum Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Tropical Horticulture Jurnal Pembelajaran dan Biologi Nukleus Agro Bali: Agricultural Journal Jurnal Agrotropika Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Agrocentrum
Bakti Wisnu Widjajani
Program Studi Agroteknologi, Fakultas Pertanian, UPN “Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Public Health Other

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The Effect of Rice Husk Biochar and Cow Manure on Some Soil Characteristics, N and P Uptake and Plant Growth of Soybean in Alfisol Supriyadi, Slamet; Widjajani, Bakti Wisnu; Murniyanto, Eko
JOURNAL OF TROPICAL SOILS Vol. 27 No. 2: May 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i2.59-66

Abstract

The effect of biochar on dryland in Madura has not been fully assessed. The objective of this study was to investigate the effect of biochar and animal manure on some soil characteristics, namely water content at field capacity, CEC, N total, available P, and N and P absorption, and plant growth of soybean in Alfisol. The research was arranged on a Randomized Completely Block Design (RCBD) with four replications. Rice husk biochar was mixed with cow manure and applied at the range of 2.5 - 10 Mg ha-1. The result showed that biochar (2.5 Mg ha-1) and cow manure (7.5 Mg ha-1) improved soil characteristics, plant growth, and soybean yield by 22%. Cow manure in this study would function as a source of nutrients while rice husk biochar acted as storage of nutrients that were then released slowly to soil solution for plant uptake. It was concluded that the mixture of 2.5 Mg rice husk biochar ha-1 and 7.5 Mg cow manure ha-1 could be the best combination of soil amendments to apply in an Alfisol in Madura.
Evaluation of Land Suitability for Sugar Cane Cultivation Haq, Thariq Naufal; Widjajani, Bakti Wisnu; Siswanto, Siswanto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1593-1603

Abstract

Land suitability is an important aspect in land planning and management, especially to determine the potential of land to support various agricultural and forestry activities. This study aims to evaluate the land suitability in the UPN Veteran East Java State Defense Garden located in Wonosalam District, Jombang Regency. The methodology used in this study involves the analysis of various factors such as soil texture, slope, soil type, rainfall, and water availability. Data were collected through field observations, soil sampling, and literature reviews related to soil physical and chemical characteristics. The evaluation results showed that most of the garden area has good suitability for certain agricultural activities, with some areas requiring special handling to optimize land use. The main factors affecting land suitability in this area include varying slope gradients and organic matter content in the soil. Recommendations from the results of this evaluation include better soil management, including the application of soil conservation techniques, and the selection of plant types that are appropriate to the characteristics of the land. This study is expected to provide useful information for garden planning and management to achieve optimal and sustainable productivity.
Efektivitas Kascing dan Kompos BSF (Black Soldier Fly) terhadap Serapan Hara N, P, Pertumbuhan dan Produksi Tomat Ceri (Solanum lycopersicum var. cerasiforme) pada Tanah Salin Riski, Aqilla Wulan; Widjajani, Bakti Wisnu; Mindari, Wanti
Agro Bali : Agricultural Journal Vol 7, No 2 (2024)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v7i2.1355

Abstract

Penelitian ini bertujuan untuk mengevaluasi efektivitas kascing (cairan hasil dekomposisi cacing tanah) dan kompos BSF (Black Soldier Fly) dalam meningkatkan serapan hara nitrogen (N) dan fosfor (P), pertumbuhan, serta produksi tomat ceri (Solanum lycopersicum var. cerasiforme)) pada tanah salin. Tanah salin sering menjadi kendala dalam budidaya tanaman, karena kandungan garam yang tinggi dapat menghambat pertumbuhan dan serapan hara oleh tanaman. Metode penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan empat perlakuan, yaitu perlakuan kontrol (tanah salin tanpa perlakuan), perlakuan kascing, perlakuan kompos BSF, dan kombinasi perlakuan kascing dan kompos BSF. Setiap perlakuan diulang sebanyak tiga kali. Data yang dikumpulkan meliputi serapan hara N dan P oleh tanaman, tinggi tanaman, jumlah daun, jumlah bunga, berat buah per tanaman, dan bobot segar total. Hasil penelitian menunjukkan bahwa pemberian kascing, kompos BSF, maupun kombinasi kascing dan kompos BSF secara signifikan meningkatkan serapan hara N dan P oleh tanaman tomat ceri pada tanah salin. Selain itu, perlakuan tersebut juga berpengaruh positif terhadap pertumbuhan tanaman, terlihat dari peningkatan tinggi tanaman, jumlah daun, dan jumlah bunga. Produksi buah tomat ceri juga mengalami peningkatan yang signifikan akibat pemberian kascing, kompos BSF, dan kombinasi kascing dan kompos BSF.
Sifat Fisik Tanah Pada Lahan Bawang Merah Di Kecamatan Gondang Nganjuk dan Kecamatan Kedungadem Bojonegoro Nugroho, Muhammad Vedo Prasetyo; Arifin, Moch.; Widjajani, Bakti Wisnu
Jurnal Solum Vol. 20 No. 1 (2023)
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jsolum.20.1.20-28.2023

Abstract

Soil physical properties are those soil properties that affect plant growth and production, determining root penetration into the soil, soil water-holding capacity, drainage, soil aeration, and soil nutrient availability. Shallots prefer fertile soil, loose, and rich in organic matter. Loose and fertile soil produces large tubers. This research was conducted to determine and study the physical properties of the soil on shallots in Kecamatan Gondang, Nganjuk and Kecamatan Kedungadem, Bojonegoro. Undisturbed and disturbed soil samples were taken at depths of 0-20 cm and 20-40 cm. Determination of the sampling point using the Purposive Random Sampling method based on the type of soil and land use as well as surveying the location of observations. The selected soil types are Vertisols and Inceptisols. Each soil type is represented by 3 sampling points. The results showed that the physical properties of the various shallot fields studied had a soil texture dominated by clay and silt with a silty clay texture class, moderate bulk density, good soil porosity, soil permeability has various classifications from slow to fast, very stable. aggregate stability, and has low C-Organic material. Several parameters of the physical properties of the soil are suitable for growing shallots. However, the C-Organic content is still in the low category and it cannot meet the need for organic matter for shallot cultivation.Key words : soil physical, shallot, Vertisols, Inceptisols
Efficiency of Biochar and Bacillus sp. in The Remediation of Cadmium (Cd) Contaminated Soil Ahaddiyah, Nur Aini; Priyadarshini, Rossyda; Widjajani, Bakti Wisnu
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 3: Jurnal Pembelajaran Dan Biologi Nukleus September 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i3.7730

Abstract

Background: Soil contamination occurs when chemical produced by humans pollute and alter the natural conditions of the soil. Contamination caused by heavy metals is very dangerous and can cause harm to the life of organisms through the food chain.  This study aims to determine the effectiveness of biochar and Bacillus sp in reducing Cd heavy metal levels. This study used contaminated soil with Cd levels of 2.59 ppm, pH 7.52, C-organic 1.30%, and CEC 18.35 Cmol/kg. Methodology: The research method used a factorial randomized block design with 2 treatment factors, each consisting of 3 levels: the first factor is biochar dosage, comprising B0 (without biochar), B1 (biochar 20 tons/ha, and B2 (biochar 40 tons/ha) and the second factor is bacterial concentration, comprising C0 (without Bacillus sp), C1 (Bacillus concentration 105), as well as C2 (Bacillus concentration 108). Further analysis if there are different ANOVA results, the BNJ 5% Test will be performed. Findings: the results showed that the combination of biochar 40 tons/ha with bacillus 105 (B2C1) was able to reduce Cd heavy metal levels by 52% over a 4-week incubation period, in addition to reducing heavy metal levels, it also increased soil pH. Cations that are on the surface of the biochar will exchange ions with heavy metals in the soil. Carboxyl –COOH functional groups found in biochar can be released as H+ ions, forming complexes with heavy metal ions and heavy metal ions will be bind to the surface of Bacillus sp. cells containing carboxyl groups, renderingthe the heavy metals unavailable.  Contribution: this study reveals the combination of biochar and Bacillus, where biochar provides an optimal microbial habitat, thuereby increasing remediation efficiency. In addition to knowing the interaction between organic materials with heavy metals and the development of natural and sustainable remediation
ANALISIS KARAKTERISTIK SIFAT FISIK TANAH DI BUKIT LAMBOSIR TAMAN NASIONAL GUNUNG CIREMAI, KABUPATEN KUNINGAN, PROVINSI JAWA BARAT MOCH ADITYAWARDANA; Widjajani, Bakti Wisnu; Purwadi, Purwadi; Wijaya, Kemal
Agrika Vol. 19 No. 2 (2025): NOVEMBER 2025
Publisher : Badan Penerbitan Universitas Widyagama Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/ja.v19i2.7366

Abstract

Komponen penting dalam menjaga produktivitas tanaman, menjaga dan memastikan kualitas udara, dan mendukung aktivitas manusia adalah kualitas tanah. Tujuan dari penelitian ini ialah untuk mengetahui kondisi fisik tanah pada penggunaan lahan di Taman Nasional Gunung Ciremai Kabupaten Kuningan. Penelitian dilaksanakan di Bukit Lambosir, Taman Nasional Gunung Ciremai, Kecamatan Cilimus, Kabupaten Kuningan, Provinsi Jawa Barat. Analisis data dilakukan dengan mengolah semua parameter yang diperoleh di laboratorium dan lapangan. Hasil yang diperoleh ditabulasi dan dihitung secara matematis, dan digunakan uji F, analisis regresi, dan analisis korelasi. Hasil penelitian ini Hasil analisis menunjukkan bahwa sifat fisik tanah di lahan hutan alami, Bukit Lambosir lebih baik dibandingkan dengan lahan semak belukar. Hal ini terlihat dari nilai permeabilitas, porositas, kapasitas menahan air (WHC), berat isi, dan kandungan bahan organik yang lebih mendukung fungsi ekologis tanah. Di antara semua satuan lahan, lahan H2 memiliki kondisi terbaik, ditandai dengan WHC tertinggi (67%), berat isi terendah (1.23 g/cm³), porositas tinggi (53.5%), dan kandungan bahan organik tertinggi (12.86%).
Co-Authors Ahaddiyah, Nur Aini Diyaurrachman, Diyaurrachman Dwi Siswanto Eko Murniyanto Eko Murniyanto Haq, Thariq Naufal Isbakhul Lail Krisna Ananta, Kevin M Ghufron Chakim MOCH ADITYAWARDANA Moch. Arifin Nugroho, Muhammad Vedo Prasetyo Penta Suryaminarsih Pertiwi, Dharmi Wimi Priyadarshini, Rossyda Purwadi Purwadi Purwadi Putri, Olivia Damayanti Riski, Aqilla Wulan Rizki, Fiorentina Cahaya S Siswanto Slamet Supriyadi Tri MUJOKO Wanti Mindari Wanti Mindari Wijaya, Kemal