Journal Galung Tropika

Fluctuations in Soil Temperature and Moisture in Various Types of Agricultural Land Use: Implications of Soil Physical Properties

Riskawati, Azalia Fajri Yasin, Fredy Titit — Thu, 18 Dec 2025 00:00:00 +0700

Climate change impacts all aspects of life including agriculture, which influences land management practices, soil temperature and moisture, and land use types. This research aims to identify soil temperature and moisture fluctuations across various agricultural land cover types and their relationship to soil physical properties. This research was conducted in Mariat District, Sorong Regency, on four types of land use and was selected intentionally (purposive sampling). The coordinates of each type of land are: Rice Field 075°77’35’’E 98°88’12”SL; Garden land: 075°75’82”E, 98°88’09”SL; Agroforestry land: 075°74’30”E, 98°88’01”SL; and Unproductive land 075°76’30”E, 98°88’80”SL. Measurement of soil temperature and humidity using environment-meter for 30 consecutive days and soil sampling was carried out (intact soil samples and disturbed soil samples) to identify the physical properties of the soil. The research results showed fluctuations in soil temperature and moisture content across each land use. In general, the average morning temperature was 27.2°C, midday 32°C, and evening 27.5°C. Meanwhile, the average soil moisture content was 79.5% in the morning, 74% in the afternoon, and 81% in the evening. The physical properties of the soil in the four land uses are different in soil texture, soil color, available water, permeability, and aggregate stability. The use of rice fields and dry fields has the same temperature and humidity. However, the use of gardens and agroforestry land tends to differ because variations influence plant vegetation. Temperatures too high and humidity too low can worsen soil conditions, causing physical degradation that affects agricultural productivity and soil sustainability.

Analisis Kadar Protein Tepung Telur Ikan Sapu-Sapu sebagai Sumber Bahan Pakan Ikan dengan Metode Spektrofotometri UV-Vis

Thu, 18 Dec 2025 00:00:00 +0700

This study aims to analyze the protein content of suckermouth catfish (Pterygoplichthys sp.) egg meal and to evaluate its potential as a fish feed ingredient. Egg meal samples were analyzed using Uv-Vis spectrophotometry with a standard albumin curve approach using linear regression. The analysis showed that the protein content of suckermouth catfish egg flour ranged from 35 to 37%. This value indicates a fairly high protein content, suggesting its potential as an additional protein source in fish feed formulations. In addition, suckermouth catfish are an invasive species that negatively impacts aquatic ecosystems. Therefore, utilizing its eggs as a feed raw material not only provides economic added value but also helps control the population of this invasive species. The use of sapu-sapu fish egg meal can be a sustainable and economical alternative for providing feed raw materials, especially to support fish growth in intensive aquaculture systems.

Pertumbuhan dan Produksi Padi Aromatik Tana Toraja dengan Pemberian Cendawan Rhizosfer dan Pupuk Organik Limbah Pertanian

Abri, Amirudin, A. Fathurrahman Hala — Wed, 17 Dec 2025 00:00:00 +0700

Continuous use of chemical fertilizers hurts soil conditions. The soil hardens quickly, is less able to retain water, and quickly becomes acidic, thus reducing plant productivity. Efforts are needed to use organic fertilizers from agricultural waste and biofertilizers from potential rhizosphere fungi. The purpose of this study was to obtain an effective formulation and combination of organic fertilizers from agricultural waste with 2 species of Rhizosphere fungi isolated from Tana Toraja aromatic rice plants, namely Aspergillus sp and Trichoderma sp, on the growth and production of Tana Toraja aromatic rice plants. This study was designed as a two-factor factorial experiment arranged in a Randomized Block Design. The first factor was three levels: Rhisosphere Fungus C0 = Without Fungus Application, C1 = Rhisosphere Fungus 5 g / liter of water. C2 = Rhisosphere Fungus 10 g / liter of water. The second factor was liquid organic fertilizer/compost from agricultural waste at three levels: K0 = No liquid fertilizer, K1 = 500 ml liquid fertilizer/10 liters of water, and K2 = 1000 ml liquid organic fertilizer/10 liters of water. Nine treatment combinations were replicated thrice, each with two plants, resulting in 54 experimental plots. The results showed that applying Trichoderma and Aspergillus fungi at a dose of 10 g/liter had the best effect. Meanwhile, applying liquid organic fertilizer from cocoa shells and straw at 1000 ml/10 liters of water had the best effect. The best combination/interaction effect was found between the application of 10 g/L rhizosphere fungi and 10 g/L liquid fertilizer, and 1000 ml/L liquid organic fertilizer on the observed components of plant height, number of tillers, number of productive tillers, number of grains/panicle, and panicle length.