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A Study of the Physical and Chemical Soil Quality in the Phaya Kham Irrigation Canal Area, Mueang District, Chiang Mai Province, to Assess Its Suitability for Agricultural Use
Organization(s):Varee Chiangmai school
Country:Thailand
Student(s):Mr. Nasit Manakij
Mr. Chawin Ruedreal
Mr. Kasidetch Tubtimsri
Miss Napassaporn Riabroi
Grade Level:Upper Primary (grades 3-5, ages 8-11)
GLOBE Member(s):Poramate Yajai
Contributors:Mr. Poramate Yajai
Ms. Napa Farkeat
Mr. Timothy Nelhams
Report Type(s):Virtual Science Symposium Report
Protocols:Bulk Density, Soil Moisture - Gravimetric, Soil pH, Soil Temperature, Soil Particle Density, Soil Fertility, Soil Characterization
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Language(s):English
Date Submitted:2026-01-29
This research aimed to analyze the physical and chemical properties of soil along the Phaya Kham irrigation canal in Mueang District, Chiang Mai Province, and to assess its suitability for agricultural use. Soil samples were collected from three sampling sites at a depth of 10–15 centimeters and analyzed following the standard GLOBE Protocol.
The results of the physical property analysis indicated that most soil samples exhibited a granular structure, which allows good water drainage and aeration, while some locations showed a blocky structure. The soil color ranged from 7.5 YR 2.5/2 to 3/2, indicating dark-colored soil with a high organic matter content. Soil consistency was generally friable. The average soil temperature was 25.4 °C, and the average soil moisture content was 600 g/m³, conditions considered favorable for plant growth.
The chemical analysis revealed that the average soil pH was 6.73, which is classified as neutral and highly suitable for crop cultivation. However, nutrient fertility analysis showed that nitrogen (N) levels were very low, while phosphorus (P) and potassium (K) levels were at moderate levels.
In conclusion, the soil in the study area exhibits favorable physical characteristics and an appropriate pH level but is deficient in certain essential nutrients. Therefore, it is recommended that soil quality be improved through the application of organic fertilizers that increase nitrogen and phosphorus levels to enhance soil fertility and promote optimal growth of marigold plants.