Jurnal Agrotek Ummat

Weeding frequency and its effect on the dominance of narrow-leaved weeds and the yield of lowland rice (Oryza sativa L.) in conventional systems

Alfin Lankasani — 2026-07-23

Weeds are one of the main limiting factors in conventional paddy rice cultivation because they can reduce yields due to competition with rice plants. This study aimed to analyze the composition and dominance of narrow leaved weeds at various weeding frequencies and their effects on paddy rice yields. The study was conducted in Sukajaya Village, Tarogong Kidul Subdistrict, Garut Regency, from July to October 2024. The experiment used a completely randomized block design with five treatments, no weeding (P0), single weeding at 20 DAP (P1), single weeding at 40 DAP (P2), double weeding at 20 and 40 DAP (P3), and weeding three times at 20, 40, and 60 DAP (P4). The observed parameters included the dominance of narrow-leaved weeds, the dry weight of narrow-leaved weeds, and rice yield components. Weeding frequency significantly affected the dry weight of Echinochloa crus-galli weeds at 60 days after planting and the number of panicles per hill, but did not significantly affect the dry weight of Digitaria sanguinalis, Cynodon dactylon, panicle length, and dry grain harvest per hill. Based on the SDR value at 60 (DAP), Digitaria sanguinalis was the dominant narrow-leaved weed in lowland rice fields, while the highest dry grain harvest numerically was obtained in the treatment of weeding twice at 20 and 40 days after planting.. Further research on variations in weeding frequency is needed to suppress weed growth and improve rice yields

Development of an Internet of Things (IoT)-based horticultural greenhouse microclimate monitoring system using the firebase realtime database platform

Aisah Lestari — 2026-07-23

The development of Internet of Things (IoT) technology enables real-time environmental monitoring over the internet. In horticultural greenhouses, microclimate monitoring is essential to support effective crop management. This study aimed to develop an IoT-based greenhouse microclimate monitoring system using ESP32 and Firebase Realtime Database. Additionally, the study evaluated the communication performance and reliability of the developed system. The research employed an experimental method based on the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) development model and was conducted over a four-day period at Kanopi Hijau Greenhouse, Mataram City, Indonesia, with shallot (Allium cepa L. var. aggregatum) as the study object. The system utilized BME280, SHT3x, and GY-302 sensors, with data transmitted at 10-minute intervals, resulting in 536 data records. The analyzed parameters included RSSI, packet loss, and system reliability. The results showed that RSSI values ranged from −48 dBm to −73 dBm, with signal quality classified as good to very good. Packet loss was generally 0%, however, on the second day, it reached approximately 89% due to network disturbances. Reliability analysis demonstrated a Mean Time Between Failure (MTBF) of 1.73 hours and an availability of 90.28%. These values indicate that the system possesses adequate communication performance and reliability for real-time monitoring.

Design, construction, and performance test of Portable Solar Dryer Dome for shrimp paste raw material drying

Melidawati — 2026-07-24

Traditional drying of shrimp paste raw materials is constrained by weather dependency, contamination risks from dust and insects, and inconsistent product quality. This study was designed, constructed, and evaluated the performance of a Portable Solar Dryer Dome for drying silver shrimp (Acetes japonicus) as the primary raw material for Indonesian fermented shrimp paste (terasi). The device features a dome-shaped galvanized iron frame (2×2 cm) covered with UV-resistant plastic (250 microns) and equipped with a battery-powered Solar Powered Fan Cooler (5000 RPM). Performance testing was focused on characterizing the dome's internal microclimate through a no-load approach, without measuring in-situ moisture content reduction, and measured Dry Bulb Temperature (DBT), Wet Bulb Temperature (WBT), and light intensity inside and outside the dome at eight observation times, with three replications. Average DBT inside the dome ranged from 27.7 to 33.3°C, exceeding ambient temperature by 5–7°C (24.0–25.7°C). Relative humidity (RH) inside the dome ranged from 57.7–73.6%, markedly lower than outside the dome (86.6–91.9%), supported by a wet bulb depression of 5–8°C indicating enhanced drying potential. Light intensity inside the dome ranged from 134–370 Lux, compared to 215–385 Lux outside, with a UV plastic transmission ratio averaging 60–97%. These results confirm the greenhouse effect generated by the UV plastic cover in creating an optimal, hygienic, and energy-independent drying microclimate for small-scale shrimp paste production.