Gardening in Ultisol[ edit ] The lack of organic matter in Ultisol makes it difficult for plants to grow without proper care and considerations. However, red soil can come from rock that is not red in color but contains iron and manganese that become oxidized as the rock is broken down through weathering.
Clay Properties Minerals in clay particles strongly attract water, causing particles to expand and contract in response to wet and dry conditions and temperature changes.
These improvements can all add up making the soil more inviting to plant growth.
Best plants for Ultisol[ edit ]. Strongly red soils are expected on convex surfaces underlain by pervious rocks.
Rain, wind, earthquakes, volcanic eruptions and other physical and chemical processes all cause weathering in one form or another. In Construction, Forestry and Agriculture Red clay has low organic matter.