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All Journal Journal of Tropical Soils AGRIKA Plumula : Berkala Ilmiah Agroteknologi Jurnal Ilmu-Ilmu Pertanian Indonesia Journal of Degraded and Mining Lands Management Jurnal Solum Caraka Tani: Journal of Sustainable Agriculture BIOEDUSCIENCE Journal of Tropical Horticulture Jurnal Agronomi Tanaman Tropika (JUATIKA) Jurnal Pembelajaran dan Biologi Nukleus Agro Bali: Agricultural Journal Jurnal Agrotropika Prosiding Seminar Nasional Pengabdian Kepada Masyarakat JURNAL HUTAN TROPIS Agrocentrum
Bakti Wisnu Widjajani
Department Of Agrotechnology, Faculty Of Agriculture, Universitas Pembangunan Nasional Veteran Jawa Timur, Surabaya
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Public Health Other

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Analisis Status dan Kelas Kemampuan Kesuburan Tanah pada Beberapa Lahan Tebu di Kecamatan Japah Kabupaten Blora Siswanto, Dwi; Widjajani, Bakti Wisnu; Siswanto, Siswanto
JURNAL AGROTROPIKA Vol. 23 No. 1 (2024): Jurnal Agrotropika Vol 23 No 1, Mei 2024
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v23i1.8326

Abstract

Sugarcane commodity is one of the important commodities in Indonesia. The relationship with the advanced industry of sugarcane is also very close, about 20% in the form of liquid sugar produced from this plant. This study was led to analyze the status and classification of soil fertility capabilities on sugarcane fields in the Japah Area. This study used a survey method with sugarcane fields selected from 9 selected villages and soil sampling depths of 0-20 and 20-40. The fertility status in sugarcane fields in Japah District is included in the Very Low (SR) and Low (R) criteria with C-Organic limiting factors, Potassium reserves, P reserves and low Base Saturation. The fertility ability classification is (T1) Ngiyono K is low, acidic and P is low, (T2) Sumberjo availability K and P are low, acidic, (T3) Wotbakah P is low, (T4) Bogem availability K and P is low, (T5) Gaplokan K and P are low, (T6) Kalinanas K and P are low, (T7) Tlogowungu availability K and low P, (T8) Dologan K and low P, (T9) Ngapus K and low P.Keywords : status, fertility capability, sugarcane land
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.
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%).
PEMETAAN LAJU EROSI DENGAN METODE USLE DI SUBDAS BANGSAL, KABUPATEN MOJOKERTO MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS Ningrum, Amanda Nur Fitria; Maroeto, Maroeto; Widjajani, Bakti Wisnu
Jurnal Hutan Tropis Vol 13, No 4 (2025): Jurnal Hutan Tropis Volume 13 Nomer 4 Edisi Desember 2025
Publisher : Lambung Mangkurat University-Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jht.v13i4.24909

Abstract

Erosi tanah merupakan permasalahan lingkungan yang berdampak signifikan terhadap degradasi lahan dan penurunan produktivitas wilayah DAS. SubDAS Bangsal, Kabupaten Mojokerto, memiliki kondisi topografi curam dan dinamika perubahan penggunaan lahan yang menjadikannya rentan terhadap erosi. Penelitian ini bertujuan untuk menganalisis laju erosi serta menentukan tingkat bahaya erosi (TBE) pada berbagai penggunaan lahan menggunakan metode Universal Soil Loss Equation (USLE) yang diintegrasikan dengan Sistem Informasi Geografis (SIG). Data yang digunakan meliputi curah hujan, sifat fisik dan kimia tanah, kemiringan lereng, serta tutupan lahan. Nilai erosi yang dihasilkan kemudian dibandingkan dengan erosi yang dapat ditoleransikan (EDP) untuk menghitung indeks bahaya erosi (IBE). Hasil penelitian menunjukkan bahwa laju erosi bervariasi antara 0,18 hingga 438,96 ton/ha/tahun, dengan nilai tertinggi ditemukan pada lahan tegalan dan kebun yang memiliki penutupan lahan rendah dan kemiringan lereng tinggi. Sebaliknya, lahan hutan menghasilkan laju erosi sangat rendah. Nilai TBE yang diperoleh mencakup kategori sangat ringan hingga sangat berat, sementara nilai IBE menunjukkan kelas sangat rendah hingga sangat tinggi, terutama pada wilayah pertanian di lereng curam. Analisis regresi mengidentifikasi faktor C dan P sebagai variabel paling berpengaruh signifikan terhadap laju erosi. Temuan ini menegaskan pentingnya pengelolaan vegetasi dan penerapan tindakan konservasi untuk menekan tingkat erosi di SubDAS Bangsal.
Carbon Dynamics in Various Agroforestry Systems: A Study of Agrosilvopastural and Two Types of Agrosilvikultural Systems Wafiqah, Hidayatul; Widjajani, Bakti Wisnu; Wijayanti, Fitri
BIOEDUSCIENCE Vol 9 No 3 (2025): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jbes/19941

Abstract

Background: Global climate change significantly affects carbon dynamics in perennial crop ecosystems, including agroforestry systems. This study aims to analyze carbon dynamics in three types of agroforestry systems: agrosilvopastoral, agrosilvicultural based on horticultural crops, agrosilvicultural based on woody plants, and to identify the diversity and types of vegetation. Methods: The study was conducted from January to March 2025 using field surveys and purposive sampling in Wonosalam, East Java, Indonesia. Laboratory analyses included physical properties (soil texture and bulk density), chemical properties. Results: The regression model showed R2 =0,419 Idicating that 41,9% of soil orgnaik carbon variation is explained by plant biomass carbon stock, highlighting its significant contribution to soil carbon accumulation. Conclusions: The agrosilvicultural system based on woody plants provides the highest contribution to carbon dynamics compared to other types of agroforestry, due to its vegetation composition dominated by woody and perennial plants. The even distribution of the Importance Value Index (IVI) reflects a stable and balanced ecosystem, as observed in plot 3, where excelsa coffee (Coffea excelsa) has an IVI of 37.78%, Durian (Durio zibethinus) has 35.56%, and banana (Musa spp) also has 37.78%. Keywords: Agroforestry; Biomass; Carbon Dynamics
Biodiversity and Carbon Storage Potential in the Lambosir Hill Area, Mount Ciremai National Park, Kuningan Regency, West Java Province Alvin Amanda Simamora; Bakti Wisnu Widjajani; Rossyda Priyadarshini
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 7 No. 3 (2025): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 7 No. 3 September 2025
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v7i3.4393

Abstract

The potential for biodiversity, including a variety of tree, shrub, and bush species, is particularly pronounced in ecosystems characterized by high biodiversity, which influences the soil's capacity to retain water—the greater the species diversity within an ecosystem, its ability to sequester CO2 increases. Lambosir Hill is one of the hills located within the protected forest area of Mount Ciremai National Park (TNGC). This study aimed to assess the level of plant vegetation diversity on Lambosir Hill and examine the relationship between biodiversity and carbon stocks. This study was conducted in Lambosir Hill, Mount Ciremai National Park in Kuningan Province, West Java. This study began in November 2022 and ended in March 2023. Activities related to data processing were carried out at the Land Resources Laboratory, Faculty of Agriculture, National Development University “Veteran” East Java. The study results showed low diversity at the shrub level and moderate at the tree level. The highest carbon stock was found in Sonokeling and the weakest in Hamerang. The land use type, slope, and vegetation composition influence these values’ differences. These results show the importance of permanent vegetation in supporting carbon stocks and ecosystem stability. It is recommended that woody tree vegetation such as Sonokeling be preserved to maintain the sustainability of carbon reserves in this conservation area.
The Optimization of Biosilica and Humic Acid to Increase Soil Nutrient Availability and Nutrient Uptake in Rice Plant in Sandy Soil Mindari, Wanti; Chakim, M. Ghufron; Widjajani, Bakti Wisnu; Sasongko, Purnomo Edi; Aditya, Haidar Fari; Pazi, Ahmad Mustapha Mohamad; Gandaseca, Seca
Caraka Tani: Journal of Sustainable Agriculture Vol 40, No 1 (2025): January
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v40i1.89018

Abstract

Nutrients in sandy soil are limited due to low absorption capacity and are easily leached or evaporated. Biosilica and humic acid extracted from compost and husk ash can improve the soil structure and absorption capacity to optimize the availability and uptake of nutrients. Therefore, this research aims to examine the optimal application dose of biosilica and humic acid to improve the chemical properties of soil with a sandy texture. The experiment was structured based on a completely randomized design (CRD). Factor 1 consisted of biosilica doses of 0, 0.5, 1.0, and 1.5 tons ha-1, while factor 2 comprised humic acid doses of 0, 20, 40, and 60 kg ha-1. Data analysis was performed using ANOVA, followed by Tukey’s Honest Significant Difference (HSD) test, correlation, and determination analysis. The study results indicate that the combination of biosilica and humic acid contributes to the changes in nutrient availability. The impact of the treatment was observed 90 days after application on the parameters of soil pH, organic C, total N, and exchangeable K. The effects of the treatment were also evident in plant nutrient uptake, specifically in total N in the roots and total K in the stems. The optimal combination for improving soil nutrient availability and nutrient uptake in plant tissues was a biosilica dose of 1.0 tons ha-1 (S2) and humic acid at 40 kg ha-1 (H2).
Co-Authors Aditya, Haidar Fari Ahaddiyah, Nur Aini Ahmad Mustapha Mohamad Pazi, Ahmad Mustapha Mohamad Alvin Amanda Simamora Diyaurrachman, Diyaurrachman Dwi Siswanto Eko Murniyanto Eko Murniyanto Fitri Wijayanti Isbakhul Lail Krisna Ananta, Kevin M. Ghufron Chakim Maroeto Maroeto MOCH ADITYAWARDANA Moch. Arifin Ningrum, Amanda Nur Fitria Nugroho, Muhammad Vedo Prasetyo Penta Suryaminarsih Pertiwi, Dharmi Wimi Priyadarshini, Rossyda Purnomo Edi Sasongko Purwadi Purwadi Purwadi Purwadi Putri, Olivia Damayanti Riski, Aqilla Wulan Rizki, Fiorentina Cahaya S Siswanto Seca Gandaseca Seruni Atyra Kinanti Slamet Supriyadi Tri MUJOKO Wafiqah, Hidayatul Wanti Mindari Wijaya, Kemal