Effects of Water and Soil Acidity (pH) on Plant Growth
Science Fair Projects
Ideas and Sample Projects by Grade Level

Home Experiments Photosynthesis Warning!
Elementary School - Grades 4-6
P=Project   E=Experiment
The Effect of Acid Rain on Marigold Plants [E]
Does the pH of Water Affect the Growth of Bean Plants? [E]
How does acid rain affect plants? [P] [P] [P] [P] [P]
The effect of water pH levels on the growth rate of plants [P] [E]
Find out if lemon acid can kill plants. [P]
Interdisciplinary Topic: Acids & Bases

Middle School - Grades 7-9
P=Project   E=Experiment
Measuring pH change in different soil types when acid is added. [E]
Humic Acid and the Optimum Soil for Plants [E]
Aquatic Plants and Their Different Water pH Levels [E]
The Effects of pH Levels and Phosphorous on the Photosynthesis Process of Aquatic Plants [P] [P]
The best pH range of soil for plant growth [P] [P]
What Type of Compost Has the Optimum pH Level? [P]
The effects of various pH levels on the photosynthesis process of the aquatic plant elodea [P]
What effect does the salicyclic acid in the "pain relief" medicine aspirin have on the growth of plants? [P]
How does acid rain affect plants? [P] [E]
Which Organic Acid Accelerates the Germination of the Green Mung Beans? [E]
Interdisciplinary Topic: Acids & Bases

High School - Grades 10-12
P=Project   E=Experiment
Determine which solution, acidic, neutral, or basic, will affect the growth of Daytona (Bush) Beans most positively. [E]
The effect of water pH levels on the growth rate of plants [E]
Soil acidity and liming overview [E]
Will the applying of a low concentration of salicylic acid (SA) to green bean plants reduce damaging effects caused by exposure to salt water stress during early growth. [E]
The effect of different pH water levels on coloring agents (pigments) in different flowers [P]
Interdisciplinary Topic: Acids & Bases
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Botany Project Ideas
Botany Topics Related Subjects
Seeds & Germination
Soils & Hydroponics
Soil Organisms
Colors in Botany
Weather in Botany
Plant Irrigation
Plant Nutrition
Plant Hormones
Plant Pesticides
UV Radiation Effects
Organic Agriculture
Genetically Modified Food
Plant Pollutants
Plant Cultivation
Plant Physiology
Plant Genetics
Plant Disease
Medicinal Plants
Acids in Botany
Salt & Sugar in Botany
Sun & Light
Environmental Sciences

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Last updated: September 2016
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