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A Study of Soil Properties Affecting the Growth and Yield of Sudan Roselle in Organic Post-Rice Fields in Phak Mai Subdistrict, Sisaket Province.
Organization(s):Phakmaiwittayanukul school
Country:Thailand
Student(s):Ms. Thananya Treekaew
Ms. Suchawadee Yodsai
Ms. Arpasiri Jungin
Mr. Kunlarote Kaewchan
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):Darunee Samerpak, Aemon Fakchiangcha, Pornwilai Piyawong
Contributors:Ms. Sasiwimon Pangma
Report Type(s):Virtual Science Symposium Report
Protocols:Soil pH, Soil Temperature, Soil Fertility, Relative Humidity, Soil Moisture - Gravimetric
Presentation Poster:
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Language(s):English
Date Submitted:2026-01-30
This research aimed to investigate the relationship between soil properties in post-rice organic farming fields and the growth and yield of Sudan roselle (Hibiscus sabdariffa L.) in Phak Mai Subdistrict, Sisaket Province. The study was conducted in three post-rice organic farming areas—Khok Samrong, Kut Kwang, and Nong Lung villages—with similar organic fertilizer management practices. Soil samples were collected at depths of 5, 10, and 30 cm before planting and after harvest to analyze soil physical and chemical properties and soil fertility following the GLOBE Protocols, including soil texture, soil structure, soil moisture, soil temperature, soil pH, and primary nutrients (N, P, and K). Data on plant growth and yield components were also recorded and analyzed using descriptive statistics. The results indicated that variations in soil physical and chemical properties and soil fertility among the study areas significantly influenced the growth and yield of Sudan roselle, with areas having higher soil moisture and greater availability of primary nutrients producing taller plants and higher yield. These findings provide baseline scientific information for soil management and post-rice land-use planning to support sustainable organic farming in Phak Mai Subdistrict.