To get started, create three miniature milk-carton landscapes: one with living plants, one with dead leaves and sticks, and one with no plant matter at all. Science Fair Project Ideas for Kids, Middle & High School Students, University of Illinois Extension: Natural Resources, the Environment and Ecosystems: Soil and Ecosystems, United States Department of Agriculture: Agricultural Ideas for Science Fair Projects: Environmental Sciences, Selah School District: The Effect of Different Potting Soil Mixtures on Radish Growth. Plant Growth Experiments - USDA ARS Discovery Gardeners who want to create rich, healthy soil that is free of disease should compost 25% of it. If the soil is mostly composed of tiny particles, it is clay soil. Soil health has a direct impact on human health but the soil is in danger the use of pesticides and chemical fertilizers are sterilizing the soil and killing living organisms. Pollution and Green Chemistry Science Fair Projects - ThoughtCo For example, choose one soil with high sand content and another with high clay content. Method & Materials. Plants grow in response to their longer stems and roots. It allows plants stems and roots to grow more rapidly (primary growth) and in larger areas (secondary growth). The soil is responsible for regulating the Earths climate and storing more carbon than all of the worlds forests combined. When there is a significant increase in length and root, this is referred to as primary growth, and this is caused by the division of cell populations in the apical meristem. Plants require the elements carbon, oxygen, and hydrogen to grow, as well as the fluids of air and water. Observe your plants performance carefully if you embark on any program of sulfur additions. How does PH level affect the plant growth? - Science Projects

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