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All Journal Jurnal Ilmu Pertanian Teknotan: Jurnal Industri Teknologi Pertanian JTSL (Jurnal Tanah dan Sumberdaya Lahan) Planta Tropika Jurnal Agro Industri Perkebunan Empowerment : Jurnal Pengabdian Masyarakat AGROMIX jurnal Ilmu Pertanian (Agricultural Science) Community Empowerment Agrisintech (Journal of Agribusiness and Agrotechnology) PERTANIAN TROPIK Agroista: Jurnal Agroteknologi Amal Ilmiah: Jurnal Pengabdian Kepada Masyarakat
Valensi Kautsar, Valensi
Faculty of Agriculture, Yamagata University
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Education Environmental Science Public Health Social Sciences Other

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Soil Color Comparison Using Munsell Soil Color Chart and Calibrated Smartphone Camera Kautsar, Valensi; Faizah, Kuni; Uktoro, Arief Ika
Teknotan: Jurnal Industri Teknologi Pertanian Vol 18, No 1 (2024): TEKNOTAN, April 2024
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol18n1.3

Abstract

Soil color is a crucial property in soil fertility assessment and monitoring. However, the subjective nature of the Munsell Soil Color Chart (MSCC) can lead to uncertainty in the analysis. To address this issue, a study was conducted to develop a soil color classification model from smartphone digital imagery based on color analysis and MSCC. The study involved taking 26 soil samples from various soil types and locations in the Special Region of Yogyakarta, Indonesia. Digital images of the soil were taken through a smartphone camera and compared with observations using MSCC to compare color differences (ΔE) based on Lab values. Soil images obtained from indoor studio conditions and calibration using spydercheckr in indoor and outdoor conditions are compared with MSCC and Chromameter values. The L*a*b color space was found to be superior to RGB for predicting and detecting small differences in color. The study also found that the Munsell soil color chart (MSCC) had a lower color difference than the chromameter in all lighting conditions, indicating that the MSCC or visual assessment can better detect the main soil color or soil matrix, while chromameter readings may have errors due to soil impurities.
Upaya Mempercepat Kematangan Buah Kopi Arabika dengan Aplikasi Hormon Silalahi, Edo Hasiholan; Astuti, Yohana Theresia Maria; Kautsar, Valensi
AGROISTA : Jurnal Agroteknologi Vol. 8 No. 1 (2024): MEI
Publisher : Program Studi Agroteknologi INSTIPER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/agi.v8i1.982

Abstract

Coffee is a plantation crop with significant economic value, commonly processed into flavorful beverages. Arabica coffee farmers generally face challenges during harvest and post-harvest, particularly with the necessity to pick ripe, red berries. However, during harvest, farmers often do not selectively pick the cherries, resulting in the collection of not only red but also yellowish or green berries. Plant growth regulators (PGRs) are synthetic chemicals that mimic the role of endogenous hormones. This study aims to investigate the interaction between different hormone types and varieties on the ripening of Arabica coffee berries, assess the impact of various hormones on berry maturity, and evaluate the effect of different varieties on the ripening process. The research utilized a completely randomized design (CRD) with two factors: plant growth regulators (PGRs) and coffee varieties. The observed parameters included the number of fruiting nodes per tree, the number of fruits per node, the number of red fruits in the first harvest, the number of red fruits in each subsequent harvest (across three stages), and the weight of green beans per 100 seeds. The analysis revealed no significant interaction between the application of different types of growth regulators (PGRs) and coffee varieties in accelerating the maturation of Arabica coffee berries. Notably, the Yellow Catura variety treated with the growth regulator Ethrel showed a better effect in accelerating berry maturity.
The response of oil palm seedlings' growth to vermicompost and water stress under the main nursery stage Kautsar, Valensi; Ismawanto, Diky; Dyah Ully Parwati, Wiwin
Jurnal Online Pertanian Tropik Vol. 9 No. 3 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v9i3.9933

Abstract

The availability of nutrients and water are two things that are essential for the development of plants. Future oil palm agriculture will require a strategy for the management of water because of the erratic nature of the weather. The addition of organic matter, such as vermicompost, is one strategy for addressing the issue of insufficient water supplies. The primary objective of this study is to investigate the relationship between oil palm seedlings' exposure to vermicompost and various levels of water stress in the main nursery. During the three-month study, 100, 200, and 300 g of vermicompost per polybag was combined with 1.0, 1.5, and 2.0 L/polybag/day. There was no relationship between the dose of vermicompost and the water stress that had observed. The addition of 300 g/polybag of vermicompost increased root fresh weight by 37.8% compared to 100 g/polybag. Moreover, water stress leads to a reduction in plant height and dry weight of the shoots. Compared to 2 L/polybag/day, plant height was lowered by 23.3% and 19.8% at watering volumes of 1.0 and 1.5 L/polybag/day, respectively. In addition, when compared to the appropriate water level of 2 L/polybag/day, high water stress (1.0 L/polybag/day) declined shoot dry weight by 12%.
Estimating SPAD, Nitrogen Concentration, and Chlorophyll Content in Rice Leaves using Calibrated Smartphone Digital Image Kautsar, Valensi; Faizah, Kuni; Uktoro, Arief Ika; Khasanah, Lutfiatun; Filiphus, Filiphus
PLANTA TROPIKA Vol 12, No 2 (2024)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v12i2.20553

Abstract

Laboratory analysis is commonly used to determine nitrogen and chlorophyll content. However, smartphones can serve as rapid, mobile, and non-destructive tools for this purpose. An equation can be created to calculate nitrogen and chlorophyll content by analyzing color parameters from digital images of rice leaves. An examination was performed on 86 rice leaf samples from the maximum tillering and mature stages. Rice leaf photos were taken with a smartphone in natural outdoor lighting. Color calibration with Spydercheckr was needed to adjust for lighting conditions. Uncalibrated and calibrated image data were analyzed to determine RGB values converted into CIELAB color space. The L*, a*, and b* values had a significant correlation with SPAD parameters, nitrogen concentration, chlorophyll a, b, and total chlorophyll content. This connection was higher after image calibration. The study found that smartphone images could predict SPAD values with 87.9% to 92.3% precision, depending on color space. Using a smartphone digital picture of L* and a* values, N content could be estimated with 84.7% and 81.9% accuracy. Average accuracy for chlorophyll a, b, and total chlorophyll content was 65% to 76%. This study shows smartphone images can estimate rice leaf SPAD and nitrogen content. 
Weeding Frequencies Improve Soil Available Nitrogen in Organic Paddy Field Maimunah, Margi Asih; Kautsar, Valensi; Bimantara, Putu Oki; Kimani, Samuel Munyaka; Utami, Asih Indah; Sabri, Riza Kurnia; Tawaraya, Keitaro; Utami, Sri Nuryani Hidayah; Purwanto, Benito Heru; Cheng, Weiguo
PLANTA TROPIKA Vol 10, No 1 (2022)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v10i1.12707

Abstract

Appropriate weeds control is needed against weeds constraints in field, especially the organic field. With the appropriate management, weeding would benefit the organic field not only in reducing weeds but also in increasing nitrogen (N) availability in organic rice fields. This research aims to observe soil available N changes affected by weeding frequencies in organic paddy fields. Treatments applied were five weeding frequencies (WF) such as 0 WF, 2 WF, 4 WF, 6 WF, and 8 WF, to study the effect of various weeding frequencies on soil total N and available N ( NH4+ and NO3–) in the organic rice field. The soil in the conventional field was analyzed as a comparison to organic field soil. The results showed that soil C and N contents are similar in all treatments. Meanwhile, 6 WF performed the highest soil  NH4+ among organic plots (10.36 mg N kg–1) and 8 WF enhanced soil NO3– to the highest average among all plots (10.12 mg N kg–1). The treatment of 6 WF and 8 WF also maintain the increase of soil  NH4+ to 51 days after transplanting (DAT), meanwhile 0 WF, 2 WF, and 4 WF decreased after 40 DAT. Water samples from fields inlet-outlet and river showed that  NH4+ content found in water sample was higher than NO3–. We concluded that the more frequencies of weeding applied to organic fields potentially preserved soil inorganic N longer, which is very important in supporting rice growth. 
PENINGKATAN KESUBURAN TANAH MEDITERAN DARI FORMASI BATUGAMPING GUNUNGKIDUL MELALUI APLIKASI PUPUK KANDANG SAPI Nusantara, Alfonsus Eka Bara; Kautsar, Valensi; Noviyanto, Amir
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 2 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.2.1

Abstract

Gunungkidul Regency is one of the areas facing agricultural challenges, including the threat of drought and extremely low soil fertility. Low soil fertility is characterized by thin soil solum, sandy texture, and low organic matter content. Several efforts to improve soil fertility have been carried out using organic materials, particularly cow manure, which is abundantly available in the local community of Gunungkidul. This study aimed to evaluate the impact of organic fertilizer application on soil fertility. Soil samples were taken from Mediterranean soil that had developed on limestone formations in Gunungkidul. The research method used was an experimental approach, analyzing the changes in the soil's physical and chemical properties following the application of organic fertilizer. The experimental design included various ratios of Mediterranean soil material (K) to cow manure fertilizer (S) as follows: (i) Control (100% Mediterranean soil material and 0% cow manure); (ii) K1S3 (25%:75%); (iii) K2S2 (50%:50%); (iv) K3S1 (75%:25%). The results showed that the K1S3 treatment demonstrated the best performance during the incubation period and significantly improved soil fertility. The K1S3 treatment resulted in enhanced soil aggregate stability, an increase in pH to 7.73 (alkaline), an increase in soil organic carbon (C-organic) to 3.55% (high), an increase in total nitrogen (N-total) to 0.49% (medium), and an increase in total phosphorus (P-total) to 0.33% (medium). The study indicates that a higher application of organic material leads to greater improvements in soil chemical properties. Therefore, the use of cow manure as organic fertilizer can be an effective solution for improving the quality of calcareous soils in Gunungkidul.
Enhancing oil palm seedling growth through the utilization of guano in early nursery stage Kautsar, Valensi; Afrizal; Parwati, Wiwin Dyah Ully

Publisher : Fakultas Pertanian Universitas Yudharta Pasuruan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35891/agx.v15i2.4527

Abstract

Introduction: Oil palm nurseries are crucial to oil palm farming success. Thus, precise management measures from the start, such as giving nutrients and using optimal planting material, are essential. Vermicompost and guano were tested as organic fertilizers in oil palm fields to replace chemical fertilizers. This study aims to evaluate the effect of guano and vermicompost as organic fertilizers on the growth of oil palm seedlings during the pre-nursery stage. Methods: Besides the control group, the experimental treatments included 10% vermicompost, 20% vermicompost, 10% guano, and 20% guano, each replicated five times in a completely randomized design. Results: The introduction of 10% guano resulted in a significant enhancement across key growth metrics Addition of 10% guano had 20.0% more leaves, 22.5% more stem diameter, and 62.1% more shoot dry weight than the control group. This study shows that guano, which includes 19% P2O5, can boost oil palm seedling growth. The inceptisols was already rich in nutrients, thus vermicompost had no effect on it throughout the three-month testing. Since the soil conditions were good, vermicompost did not change them during the three-month trial. The correlation matrix showed a strong and constant link between seedling shoot and root fresh and dry weights. The relationship between organic fertilizers and oil palm nursery growth highlights the importance of a well-rounded plant development profile. This highlights the complex relationship between organic fertilizers and oil palm growth. Conclusion: Guano at 10% has been shown to improve oil palm seedling growth in the nursery phase, outperforming vermicompost.
Pemberdayaan Petani Tembakau melalui Diskusi Konservasi Tanah dan Air di Desa Kwadungan Gunung Kautsar, Valensi; Tarmadja, Samsuri; Ismiasih, Ismiasih; Ferhat, Amallia
Empowerment Vol. 7 No. 01 (2024): Empowerment
Publisher : Program Studi Ilmu Hukum Fakultas Hukum Universitas Kuningan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25134/empowerment.v7i01.9251

Abstract

Kwadungan Gunung Village, located in Kledung Sub-district, Temanggung Regency, is a region characterized by its agricultural nature and sloping topography. This results in a significant risk of soil and water damage owing to erosion. The survey and land analysis indicate that erosion has transpired in many locations, ranging from low to medium severity. Furthermore, numerous constraints imposed by farmers suggest that there is a relatively restricted supply of water during the dry season. Hence, it is imperative to implement genuine measures for soil and water conservation. The primary goal of this empowerment is to enhance the comprehension and implementation of soil and water conservation practices among local farmers. The aim is to ensure that the agricultural cultivation business in Kwadungan Gunung Village operates in a sustainable. Initially, discussing sessions on soil and water conservation were carried out in partnership with the local government of Kwadungan Gunung Village. Result showed that farmers have applied conservation measures, albeit to a limited scale. The favorable reception of the extension initiatives indicates the capacity to enhance the use of conservation practices. Subsequently, a demonstration plot will be created to showcase soil and water conservation measures. This plot will function as a tangible example for farmers and will also be included in the farm evaluation process. This demonstrates the unwavering dedication of the agricultural community to the principles of sustainable farming and environmental preservation.
Analisis Pertumbuhan dan Produktivitas Kelapa Sawit pada Variasi Kerapatan Tanam Parwati, Wiwin Dyah Ully; Nadeak, Filemon Hepron; Kautsar, Valensi
Jurnal Agro Industri Perkebunan Vol. 12 No. 2 (2024)
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jaip.v12i2.3535

Abstract

In oil palm growth, planting density has a sustainable impact on its productivity. To enhance the long-term growth and production yield of oil palm, it is crucial to consider the establishment of appropriate planting densities during the initial planting phase. This research explores the relationship between planting density and productivity, highlighting the importance of determining optimal plant densities for optimal yields. The study was conducted at the Muara Tawang Estate (MTNE) in Kapuas Hulu Regency, West Kalimantan Province. Two blocks of oil palm land with three different planting densities (130, 136, and 143 plants per hectare) were observed to understand the relationship between planting density and agronomic characteristics. Measurements were taken on plant height, frond length, petiole width, number of male and female flowers, and sex ratio. The analysis unveiled consistent trends in oil palm production, which varied based on planting density. Planting densities of 130 and 136 showed superior production trends compared to 143, with 136 demonstrating production increases ranging from 19.8% to 29.8% relative to density 143, alongside enhancements in plant height and frond length by 4.6% and 5.4%, respectively. Additionally, petiole thickness and width were notably lower in density 143, experiencing reductions of 8.0% and 11.0%, respectively, compared to density 136, while the sex ratio exhibited a similar pattern, declining by 34.0% in density 143 compared to 136. This highlights the importance of determining appropriate planting densities to enhance oil palm productivity.
Application of solar power plants as aerator power source for biofloc aquaculture of Makaryo Nyoto Farmers Group Purnawan, Purnawan; Lestari, Nidia; Bekti, Rokhana Dwi; Kautsar, Valensi; Prabowo, Fajar Yulianto; Utama, Made Andy Wira; Azzahra, Icha; Al Ayyubi, Muhammad
Community Empowerment Vol 10 No 6 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.12909

Abstract

The agricultural and fisheries sectors in Wukirsari Village remain primary economic drivers. However, traditional fisheries management leads to inconsistent catfish and tilapia harvests and high feed costs, hindering Gapoktan Makaryo Nyoto from maximizing profits. The open-air location of the aquaculture development offers significant potential for utilizing sunlight to generate electricity. This study implements a Solar Power Plant (SPP) as a power source for aerators installed in biofloc ponds. The installation, operation procedures, maintenance, and repair of the SPP were socialized to Gapoktan Makaryo Nyoto members. The installed SPP successfully powered a 100W, 220V aerator, supplying oxygen to three biofloc ponds. Increased oxygen supply is expected to support fish growth. By the end of the program, Gapoktan Makaryo Nyoto members were proficient in operating and utilizing the SPP, leading to improved fish harvests and quality. Additionally, surplus power from the SPP was used for lighting the pond area.
Co-Authors Afrizal Al Ayyubi, Muhammad Azzahra, Icha Bekti, Rokhana Benito Heru Purwanto Bimantara, Putu Oki Chizuru Sato, Chizuru Dyah Ully Parwati, Wiwin Faizah, Kuni Ferhat, Amallia Filiphus, Filiphus Hironori Yasuda, Hironori Illahiyah, Ahmad Muqit Nur Ismawanto, Diky Ismiasih, Ismiasih Keitaro Tawaraya Khasanah, Lutfiatun Kimani, Samuel Munyaka Kristiyani, Cicilia Dewi Maimunah, Margi Asih Mawandha, Hangger Gahara Miwa Takei, Miwa Muhammad Andang Novianta Nadeak, Filemon Hepron Nidia Lestari Noviyanto, Amir Nusantara, Alfonsus Eka Bara Parwati, Wiwin Dyah Ully Petroningdyah, Alya Prabowo, Fajar Yulianto Purnawan Purnawan Purnawan Rokhana Dwi Bekti, Rokhana Dwi Sabri, Riza Kurnia Samsuri Tarmadja, Samsuri Satoru Sato, Satoru Silalahi, Edo Hasiholan Sri Nuryani Hidayah Utami Suparni Setyowati Rahayu Uktoro, Arief Ika Utama, Made Andy Wira Utami, Asih Indah Weiguo Cheng, Weiguo Yohana Theresia Maria Astuti, Yohana Theresia Maria Yuka Sasaki, Yuka