Jurnal Agricultural Biosystem Engineering

Effectiveness of Cassava Harvesting by Applying Harvesting Implement

Warji Warji — 2025-08-23

Cassava is one of Indonesia’s leading food commodities, especially in Lampung Province. However, cassava harvesting is still predominantly done manually, which is time-consuming, labor-intensive, and prone to crop damage. This study aims to evaluate the effectiveness of cassava harvesting using a Kubota mechanical harvesting implement compared to traditional manual methods. The research was conducted in Bandar Mataram District, Central Lampung Regency, over an area of 0.75 hectares and observed parameters including harvest time, tuber damage, losses, and labor efficiency. Results showed that the harvesting implement significantly improved efficiency, allowing one machine to harvest up to 1.07 hectares per day, compared to only 0.045 hectares per day per person using manual labor. Tuber damage and losses were also reduced from 7% in manual harvesting to 1.59% with the implement. Furthermore, the implement created soil ridges suitable for direct replanting without further tillage. Despite its advantages, some operational weaknesses were identified, such as the need for stem cutting and transportation improvements. Overall, the use of mechanized harvesting tools enhances cassava farming efficiency and has the potential to reduce labor dependency and improve farmer productivity.

Kinerja Pengering dan Karakteristik Penepungan Daun Singkong (Manihot esculenta C)

Pingkan Najua Demato — 2025-09-16

Cassava is one of the agricultural products that is abundant in Indonesia. The potential for cassava processing is very large along with the development of industry and leaving waste in the form of cassava leaves whose utilization is still limited. Cassava leaves are green vegetables that have nutritional content of protein, vitamins, and minerals. However, cassava leaves have the characteristic of being easily damaged because cassava leaves have a highwater content, allowing enzyme activity to occur. This causes cassava leaves not to be utilized optimally even though cassava leaves have a high protein content. Drying using a convection oven is an effective way to increase shelf life. The use of a hybrid dryer is an effective choice for drying cassava leaves. Material testing using electricity and solar power (hybrid) is carried out for 6 hours. Material testing using an oven is carried out for 4 hours. Testing using direct solar power (traditional) is carried out by drying for 6 hours. Proximate analysis is one method that has often been used to determine the nutritional content of raw materials or food. From the results of testing the proximate content of cassava leaf flour using a hybrid dryer, it was obtained; water content 3.18%, ash content 4.92%, fiber content 13.12%, protein 20.06%, fat content 5.18%, and BETN 66.66%. Drying using an oven, namely, water content 5.96%, ash content 5.99%, fiber content 15.72%, protein 16.132%, fat content 4.35%, and BETN 67.58%. Drying using solar energy (traditional), namely, water content 6.94%, ash content 4.98%, fiber content 16.48%, protein 16.84%, fat content 3.66%, and BETN 67.58%.

Uji Kinerja Alat Chopper Serbaguna Untuk Merajang Batang Singkong Varietas Bayeman

Sandi Asmara — 2025-09-16

Cassava production not only produces tubers and leaves that can be used as
vegetables, but there is also waste produced, one of which is cassava stems. So
far, cassava stem waste has not been widely utilized by farmers, so after the
cassava is harvested, the cassava stems are just left lying on the land. This study
aims to reduce cassava stem waste by reducing the size using a multi-purpose
Chopper tool with several variations in engine rotation per minute (RPM). This
research was conducted at the Agricultural Machinery and Equipment Power
Laboratory, Department of Agricultural Engineering, Faculty of Agriculture,
University of Lampung in March 2025. The treatment used 3 variations of RPM,
namely 1500, 1800, and 2100 where each used 3 different input amounts, namely:
input of 3 stems, 4 stems, and 5 stems and each RPM was repeated 3 times. The
results showed that chopping using the RPM setting of 2100 and the input amount
of 4 cassava stems had the best work capacity with a value of 150.8 kg/hour. The
lowest fuel consumption using RPM variation of 1500 and the amount of input of
3 sticks with a value of 591.6 ml/hour.

Unjuk Kerja Mesin Perajang Biomassa Tipe Slicer Untuk Merajang Batang Singkong

Rio Dwi Saputra — 2025-09-16

This study aims to evaluate the performance of the Rabakong slicer-type machine and compare it with previous models. A Completely Randomized Design (CRD) was used with two factors: machine rotation speed (1500, 2000, and 2700 RPM) and the number of cassava stems input (2, 3, and 4 stems). Each treatment was repeated three times for 10 minutes. Observed parameters included work capacity (kg/h), fuel consumption (l/h), percentage of product loss, slicing uniformity (%), and ergonomic aspects of operator performance. The results showed the highest work capacity of 522.2 kg/h at 2700 RPM with 4 stems. The lowest product loss (0.82%) occurred at 2000 RPM with 3 stems, while the lowest fuel consumption (0,680 l/h) was recorded at 1500 RPM with 4 stems. The highest slicing uniformity (58%) was obtained at 2700 RPM, particularly for output passing through a 0.1 mm mesh. The Rabakong slicer-type machine falls under the moderate workload category with a CVL of 41–47% and an operator heart rate of 125–135 bpm, still within safe limits (Tarwaka, 2004). This machine outperforms its predecessor in capacity, uniformity, fuel efficiency, and operator comfort. Therefore, it is recommended as an effective solution for processing cassava stem waste into value-added products such as animal feed or compost.

Monitoring VPD (Vapor Pressure Deficit) pada Greenhouse dengan Ventilasi Alamiah

Muhammad Ivanka Apriyatama — 2025-09-30

Greenhouses with natural ventilation face challenges in maintaining a stable microclimate, particularly in managing air temperature and humidity, which affect the Vapor Pressure Deficit (VPD). This study aimed to monitor and analyze VPD levels inside a naturally ventilated greenhouse using misting (fogging) treatments at different heights, in order to determine the most effective strategy for VPD control. The research was conducted at the Department of Agricultural Engineering, University of Lampung, using three treatments: no fogging (T1F0), fogging at 50 cm (T2F50), and fogging at 100 cm (T3F100) above the plant canopy. Temperature and humidity data were collected using DHT22 sensors and a hygrometer, and used to calculate VPD values. The results showed that the 50 cm fogging treatment (T2F50) effectively reduced VPD to an average of 0.97 kPa, which is within the optimal range (0.5–1.2 kPa) for plant growth. In contrast, the no-fogging treatment produced the highest VPD value (2.17 kPa), which could cause plant stress. Statistical analysis (ANOVA and LSD test) indicated that fogging height significantly influenced VPD values, especially under hot weather conditions. Therefore, fogging at 50 cm is recommended as the most effective treatment for maintaining optimal VPD in naturally ventilated greenhouses.

Pengeringan Kacang Tanah Menggunakan Energi Panas Pembuangan AC

Indah Puspitasari — 2025-09-30

This study aimed to determine the effectiveness of the peanut drying process by utilizing waste heat from an air conditioner (AC) condenser, using two types of drying systems: horizontal and vertical heat flow. The results showed that the vertical heat flow dryer was more effective, achieving a consistent final moisture content of below 6% (in accordance with SNI 01-3921-1995) within 18 hours, with stable temperatures ranging from 38–40°C and RH below 50%. In contrast, the horizontal heat flow dryer resulted in uneven moisture content (3–14%) with less stable temperature and RH conditions. The drying rate constant (k) was higher in the vertical dryer, indicating a faster rate of water evaporation. Based on these findings, it can be concluded that waste heat from an AC condenser can be utilized as an alternative energy source. The vertical heat flow dryer is more efficient in reducing the moisture content of peanuts to meet storage quality standards.

Pengaruh Ukuran dan Warna Kerabang Telur Itik Terhadap Hasil Pengasinan

Rio Edy Saputra Purba — 2025-09-30

This study aims to study the effect of shell color and duck egg size on salting results. The method used in this study is a factorial Completely Randomized Design (CRD) with 3 treatment levels and 3 replications. The first factor is egg size and the second factor is duck egg shell color. The parameters observed were thickness, weight changes, texture, NaCl, and organoleptics such as aroma, color, texture, saltiness and preference. Data from the observation results will be analyzed using analysis of variance (ANOVA) followed by the HSN (Honest Significant Difference) test if there is a significant effect. The results showed that the treatment of duck egg shell size had a significant effect (Fhit>Ftab) on the thickness of texture, NaCl, aroma organoleptic and texture of mash. Then the interaction of treatments had a significant effect (Fhit>Ftab) on organoleptic mash. While the color treatment did not have a significant effect (Fhit<Ftab) on all parameters. The conclusion obtained in this study is that the larger the egg size, the higher the thickness, texture, organoleptic aroma and flavor values of salted duck eggs, while the NaCl content is lower.