Student Research Reports
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How do different organic materials effect the pH of soil within a week examination period
Organization(s):Ottawa Hills Jr/Sr High School
Country:United States of America
Student(s):Lola Lenavitt and Kacie Dale
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):Kacie Dale, Gloria Kreischer Gajewicz
Contributors:Dr. Gloria Kriesher-Gajewitz
Report Type(s):Virtual Science Symposium Report
Protocols:Soil pH
Presentation Poster:
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Language(s):English
Date Submitted:2026-02-02
Our Research tests what variables can affect the pH of soil the most significantly. In our background information it was more commonly found for the variable to increase the pH rather than decrease the pH. Our hypothesis was if we use different organic materials to alter the pH of soil, then lemon juice will alter the pH the most significantly, because it has the greatest contrast in pH compared to soil. In our experiment, we tested the effect on the pH of dirt when mixed with pH altering variables.In our results, we found baking soda had the most significant effect on the pH. Followed by coffee and eggshells with little change to the pH. Finally, lemon juice had no final change in the pH of soil. Overall, our hypothesis was proven to be incorrect however, these results overall matched our predictions for all but one variable.