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All Journal Journal of Tropical Soils Jurnal Sosial Ekonomi Pertanian JTSL (Jurnal Tanah dan Sumberdaya Lahan) Techno: Jurnal Penelitian Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Agriprima : Journal of Applied Agricultural Sciences Jurnal Agroekoteknologi dan Agribisnis Journal of Applied Agricultural Science and Technology
Cahyoadi Bowo
Program Studi Ilmu Tanah, Fakultas Pertanian Universitas Jember, Jl. Kalimantan 37, Kampus Tegal Boto, Jember 68121
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Environmental Science Social Sciences

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DINAMIKA KELEMBAGAAN KELOMPOK TANI HUTAN RAKYAT LAHAN KERING DI DESA TAMBAK UKIR KECAMATAN KENDIT KABUPATEN SITUBONDO Cahyoadi Bowo; Agus Supriono; Kacung Hariyono; Safari Kosasih
Jurnal Sosial Ekonomi Pertanian (J-SEP) Vol 5 No 3 (2011)
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kabupaten Situbondo is one of Kabupaten in East Java province that frequently developes dry land of community forest, particularly on the community forest. Model of policy being applied is through reinforcement of community forest farmer group empowerement. However, there are still many obstacles for the implementation in the real field. This condition is believed to be affecting by the level of group dynamics at the farmer group institutional as one of the factor. Being interested on this phenomenon, then research team was attracted to conduct the study in order to find out about the group dynamics on those several dry land smallholder groups. The research was conducted at Village of Tambak Ukir-Kecamatan Kendit. Method of analysis being used is interval class. The research result showed that one of the farmer group has medium dynamic (Jaya Makmur), then two other groups has low dynamic (Karya Tani and Suka Maju), and one of group has very low dynamic (Gua Kembar). Jaya Makmur farmer group is more developed that three other farmer groups because it has dimension objectives of group, group compactness, group structure, duty function of group, development and maintenance of group, situation of group, effectiness of group and also group pressure that relatively more dynamic. Key Words : dry land, community forest, farmer group, group dynamics
ANALISIS INDEKS KEKERINGAN METODE STANDARDIZED PRECIPITATION INDEX (SPI) DAN PENGARUHNYA TERHADAP PRODUKTIVITAS PADI DAN JAGUNG Dewi Masruroh; Cahyoadi Bowo
Jurnal Tanah dan Sumberdaya Lahan Vol. 9 No. 2 (2022)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (777.794 KB) | DOI: 10.21776/ub.jtsl.2022.009.2.8

Abstract

Drought is one of the most significant impacts of the climate on agriculture, especially food crops. Standardized Precipitation Index (SPI) is an Index for droughts. The research objective was to study the relationship of SPI values to the productivity of rice and corn crops in the Situbondo district. The result showed that the value of the SPI time scale at three months is the most appropriate for the observed productivity of rice and corn. The SPI value significantly correlated with the productivity of rice plants in the Jatibanteng and Arjasa districts but did not significantly affect the productivity of corn in the Mlandingan and Situbondo districts. Furthermore, the El-Nino phenomenon reduced the rice productivity up to 3.9% and the corn productivity up to 48.1%. The La-Nina phenomenon reduced rice productivity up to 26.0% but increased the productivity of corn up to 81.7%.
MENINGKATKAN PERTUMBUHAN TANAMAN MENTIMUN (Cucumis sarivus L.) DI TANAH SALIN DENGAN PELINDIAN TANAH DAN PENAMBAHAN AMELIORAN Putra, Rafii Adhimas Tri; Bowo, Cahyoadi
Jurnal Tanah dan Sumberdaya Lahan Vol. 11 No. 1 (2024)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2024.011.1.4

Abstract

This study aimed to assess the impact of combinations of varying soil amendments and water amounts on the leaching water requirement for cucumber growth and production. Saline soil was collected from Banongan, Situbondo, with soil electrical conductivity (EC) of 4-6 dS m-1. A 10 kg soil sifted with a diameter of 2 mm was placed in each mini lysimeter. Leaching was carried out until the soil EC reached below 2 dS m-1. The results showed that soil leaching reduced soil EC from 5 dS m-1 to 1.6-1.8 dS m-1; meanwhile, EC in leachate ranged from 2-2.3 dS m-1. Biochar treatment caused an increase in leaching water requirements. In addition, applying biochar combined with 40 mm day-1 of water produced the highest fruit number. The combination treatment of cow manure 100 g pot-1 (equivalent to 20 t ha-1) and biochar 30 g pot-1 (equivalent to 6 t ha-1) and adding 40 mm day-1 of water during each water application produced the most prominent fruit volume. Furthermore, utilizing 40 mm day-1 of leaching water produced the best number of leaves, fruit weight, length, and fruit circumference.
Comparison of Empirical Methods to Estimated Reference Evapotranspiration Fitriani, Vivi; Bowo, Cahyoadi; Mandala, Marga; Gandri, La
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 12 No 2 (2024): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jrpb.v12i2.629

Abstract

Evapotranspiration plays an important role in agricultural water management and crop modelling. Estimating reference Evapotranspiration (ETo) using meteorological variables, both theoretical and empirical methods, is highly recommended considering the availability of weather data in several locations. The estimation method recommended as the standard method is FAO Penman Monteith (FAOPM), but due to the limited meteorological data in a region and the difficulty and complexity of FAOPM, it is recommended to use the empirical method which is easier and only requires a few simple meteorological variables. The aim of this research is to compare and evaluated empirical methods for estimating ETo against the FAOPM. The statistical analysis using in this research are RSME, MAE, coefficient Correlation, NSE, Average bias, index of agreement, and confidence index (c). Evaluation for the best models based on statistic analyzed shows that several empirical methods show terrible performance in estimating the monthly average ETo (mm/day), which are Thornthwaite-Mather, Hargraves-Samani, Makkink, Hamon, Romaneko, and Kharauffa. Modified Blaney-Criddle method showed a good performance method, while PMAWS showed very good performance The Turc and Hansen method showed excellent performance with RMSE, MAE, NSE, and C values ​​for the Turc method, are 0.12, 0.11, 0.78, 0.92 respectively, and for the Hansen method are 0.12, 0.1, 0.8, and 0.89 respectively.
Respon Respon Pertumbuhan dan Hasil Tanaman Kale (Brassica oleracea L.) Terhadap Frekuensi dan Dosis Pupuk NPK Dalam Bentuk Enkapsulasi Fachrurrozi, Faisal; Saputr, Tri Wahyu; Bowo, Cahyoadi; Suci Ristiyana
Jurnal Agroekoteknologi dan Agribisnis Vol. 9 No. 1 (2025): Jurnal Agroekoteknologi dan Agribisnis
Publisher : Politeknik Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51852/pywpb753

Abstract

Encapsulation in the combination of specification components with additional elements to create a capsule as a protective material. NPK fertilizer is one of the inorganic fertilizers that is used very efficiently in increasing the availability of macro nutrients N, P, and K replacing single fertilizers which are sometimes difficult to obtain and very expensive. Kale itself is a plant that is rich in nutrients, moreover it contains many high antioxidants and other good compounds and is also classified as a superfood plant. However, the development in Indonesia is still low due to land degradation and fertilizers that have been contaminated by other materials. The use of encapsulation in fertilizers is needed because it provides many benefits such as increasing soil binding capacity to water, facilitating root growth, storing water longer, efficient use and can be used in agricultural land, plantations, and critical land reclamation. The provision of NPK encapsulation can increase the effectiveness of plants, increase the substance of soil humus, growth hormones, enzymes and organic compounds in the soil. This study used a completely randomized design with two factors, namely the frequency of fertilization (once, twice, and thrice). The second factor is the encapsulation dose with 4 levels including control, 10, 15, and 20 gram. The results showed the best results in N1P1 for plant height, N1P2 for plant fresh weight with a dose of 10 grams and a fertilization frequency of 1 time and a dose of 10 grams and a fertilization frequency of 2 times. Giving a dose of NPK encapsulation of 10 grams (N1) is proven to increase growth and yield in kale plants and can be recommended as an alternative to kale plant cultivation.
Pengaruh Dosis dan Frekuensi Pemberian Urea Enkapsulasi pada Metode Irigasi Tetes terhadap Pertumbuhan dan Hasil Tanaman Kailan (Brassica oleracea var. Alboglabra) Panuluh, Pulung Damar; Cahyoadi Bowo
Agriprima : Journal of Applied Agricultural Sciences Vol 9 No 1 (2025): MARCH
Publisher : Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/agriprima.v9i1.626

Abstract

Kandungan nitrogen dalam urea mudah menguap dan larut dalam air, oleh karena itu efisiensi pemupukan urea perlu diperbaiki dengan mengubahnya menjadi slow-release fertilizer. Penelitian ini bertujuan untuk menghasilkan urea terenkapsulasi, mengetahui tingkat pelarutan urea terenkapsulasi, dan mengetahui interaksi antara dosis dan frekuensi pemberian urea terenkapsulasi terhadap pertumbuhan dan hasil tanaman kailan. Penelitian dilakukan di Greenhouse Balai Penyuluh Pertanian Wirolegi, Sumbersari, Jember, dengan koordinat geografis 8°11'18,08'' LS dan 113°44'57,91'' BT pada ketinggian 123 MDPL. Percobaan disusun dengan model rancangan acak lengkap faktorial, melalui perbedaan dosis dan frekuensi pemberian urea terenkapsulasi dengan ulangan 3 kali. Data pengamatan dianalisis menggunakan ANOVA dan kemudian diuji lanjut dengan uji DMRT pada taraf kesalahan 5%. Hasil penelitian menunjukkan bahwa interaksi dosis dan frekuensi pemberian urea terenkapsulasi menghasilkan pertumbuhan dan hasil tanaman kailan terbaik terhadap jumlah daun, luas daun, bobot segar tanaman, dan kandungan klorofil. Urea terenkapsulasi dapat dibuat dari penyalut zeolit alam, alginat, dan tepung sagu. Tingkat pelarutan urea terenkapsulasi terbaik diperoleh melalui penimbunan dengan tanah lembab. Jumlah urea terenkapsulasi yang dibutuhkan adalah 240 kg/ha untuk meningkatkan bobot segar tanaman, sedangkan 480 kg/ha diperlukan untuk meningkatkan kandungan klorofil. Urea terenkapsulasi terbukti meningkatkan hasil dan kualitas tanaman dengan mengatur dosis dan frekuensi pemberian.
BIOCHAR DAN KOMPOS UNTUK PENINGKATAN SIFAT FISIKA TANAH DAN EFISIENSI PENGGUNAAN AIR Safitri, Indah Nurul; Setiawati, Tri Candra; Bowo, Cahyoadi
TECHNO: JURNAL PENELITIAN Vol 7, No 01 (2018): Techno Jurnal Penelitian
Publisher : Universitas Khairun

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Abstract

Biochar merupakan mineral amorf digunakan sebagai bahan pembenah tanah. Biochar dikombinasikan dengan kompos untuk memperbaiki sifat fisika tanah dengan indikator tanaman Jagung Manis. Penelitian dilaksanakan pada bulan Mei-Agustus 2017 di Agrotekhnopark Universitas Jember. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) Faktorial 2x5 dengan tiga ulangan. Faktor pertama adalah kompos terdiri dari kontrol (K0) dan kompos 10 ton/ha (K1) dan faktor kedua adalah biochar terdiri dari kontrol (B0), biochar batang jagung 20 ton/ha (B1) dan 40 ton/ha (B2), biochar jerami padi 20 ton/ha (B3) dan 40 ton/ha (B4). Hasil penelitian menunjukkan pemberian kompos 10 ton/ha dan biochar batang jagung 40 ton/ha mampu menurunkan BV (26,5%), meningkatkan porositas (9,2%), meningkatkan pori air tersedia (61,9%). Pemberian biochar batang jagung 40 ton/ha meningkatkan berat basah (20,6%) dan berat kering tanaman (30,1%). Kombinasi perlakuan kompos (10 ton/ha) dan biochar jerami (40 ton/ha) mampu menurunkan kebutuhan air tanaman sebesar 34,4%. Pemberian biochar mampu mengefisiensi penggunaan air tanaman tertinggi sebesar 0,77 g/mm dibandingkan dengan kontrol sebesar 0,51 g/mm setiap tanaman. Kata kunci: Alfisol, biochar, kompos, efisiensi air, jagung manis
Penentuan Kurva Retensi Air Tanah Laboratorium dengan Sensor Resistensi dan Kapasitansi Bowo, Cahyoadi; Hasan, Mohammad; Marhaenanto, Bambang
JOURNAL OF TROPICAL SOILS Vol. 14 No. 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.57-64

Abstract

A soil water retention curve determination method is developed based on the use of gipsblock and capacitance sensors. The objective of the research was to provide a simple and quick method in characterization of soil water retention in the laboratory based on resistance and capacitance sensors. Undisturbed soil sample collected using stainless steel ring sampler 8cm in diameter and 6cm height. Digital gipsblock and capacitance sensors connected to personal computer detected periodically water tension and volumetric water content of the sample. To test the reliability of collected data, measurement using pressure plate apparatus was also conducted. Result of the experiment for soil samples textural classes loam to clay loam leaded well compromise with result from pressure plate. However, significant deviation of soil water content has been detected as the  soil water suction exceeded 15,000hPa. Deviation of measured water content increased with the reducing water content up to 0.300cm3.cm-3. Implication of this result showed a further finer standardization assesing water tension above 10.000hPa is needed.
Assessing Leaching Requirement an Ameliorated Saline Soil in a Lysimeter Experiment Bowo, Cahyoadi; Fitriani, Vivi; Mandala, Marga
JOURNAL OF TROPICAL SOILS Vol. 29 No. 1: January 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i1.1-9

Abstract

Soil salinity problems in the coastal hinterland region of East Java diminish agricultural development and land productivity. Soil leaching is expected to reduce soil salinity. This study investigated the effectiveness of different ameliorant compositions and leaching requirements (LR) in the leaching process. The experiment involved applying ameliorants (T) and leaching (L) treatments to lysimeters filled with saline soil. The ameliorant treatments included biochar, organic matter, and gypsum. The results showed the leaching requirement capacity to reduce electrical conductivity from 5.7 dS m-1 to below 2 dS m-1. Leaching for T0 (without ameliorants) and T1 (10 Mg ha-1 of biochar) required 943 mm of water, while T2 (20 Mg ha-1 of biochar) and T3 (40 Mg ha-1 of compost) required 1052 mm. The T4 (10 Mg ha-1 of compost and 2 Mg ha-1 of gypsum) necessitated 1154 mm of leaching water. The ameliorants’ application and assortment increased the water demand for leaching. The findings indicated a consistent relationship between TDS and salinity, indicating the soil’s dominant presence of salty ions.
The Use of Aquacrop Model for Soybean in Various Water Availability Within a Lysimeter System Ramadhani, Farchan Mushaf Al; Bowo, Cahyoadi; Slameto, Slameto
Journal of Applied Agricultural Science and Technology Vol. 7 No. 4 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i4.153

Abstract

The AquaCrop model is widely used under various agro-ecological conditions to reduce farm water consumption. The study aimed to simulate, validate, and measure the performance of AquaCrop models for canopy cover, biomass and soybean crop yields cultivated within a lysimeter. This research was conducted in the experimental field of the Faculty of Agriculture, the University of Jember, Indonesia (8°09'45.1" S, 113°42'58.2" E, 101 m a.s.l). There are four treatments in 4 lysimeters, namely P1 (irrigation based on recommendation), P2 (irrigation 95-105% FC), P3 (irrigation 75-85% FC) and P4 (irrigation 55-65% FC). The AquaCrop model is calibrated using canopy cover (CC) and then validated to predict the biomass and soybean yield. The experiment revealed that the model simulates better CC, biomass, and soybean yields with full irrigation than deficit irrigation. The performance of the AquaCrop model for soybeans of the Deja 2 variety in predicting CC, biomass, and soybean yield is impressive and reasonable. For the CC we found R2 ranges from 0.956 to 0.995, RMSE 10.389% to 3,293%, NRMSE 0.154% to 0.051%, NSE 0.918 to 0.992, and d 0.980 to 0.998. For biomass the R2 is 0.842, RMSE 0.111 t ha-1, NRMSE 0.017%, NSE 0.712, and d 0.937. For soybeans production the R2 is 0.999, RMSE 0.045  t.ha-1, NRMSE 0.018%,, NSE 0.908 and d 0.970. This study demonstrated that based on WUE, 55-65% FC irrigation is the most efficient application.
Co-Authors Agus Supriono Bambang Marhaenanto Dewi Masruroh Fachrurrozi, Faisal Gandri, La Kacung Hariyono Mandala, Marga Mohammad Hasan Panuluh, Pulung Damar Putra, Rafii Adhimas Tri Ramadhani, Farchan Mushaf Al Ristiyana, Suci Safari Kosasih Safitri, Indah Nurul Saputr, Tri Wahyu Setiawati, Tri Candra Slameto Slameto Vivi Fitriani Vivi Fitriani