Mature soil has gone through the natural soil formation process. It has clearly developed genetic horizons and become stabilized to be in equilibrium with its environment. More »

The growth rate of oak trees varies depending on the species. Oak trees may be classified as deciduous or evergreen trees and grow at very slow or quite rapid paces. Some oak trees take nearly a century to reach their fu... More »

The dwarf gardenia is a flowering perennial plant that can grow up to 2 feet high and 3 feet wide when it is mature. It produces very fragrant flowers in June and July. More » Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

According to the BBC, there are six major types of soil: clay soil, sandy soil, silty soil, peaty soil, chalky soil and loamy soil. Knowing which type of soil is being used helps a person decide what to plant and how to ... More » Science Earth Science Soil

The frost line is the maximum depth at which soil is frozen, or the lower limit of permafrost. The depth of the frost depends on the local climate, the heat transfer properties of the soil, and the adjacent materials and... More »

The soil of marine biomes varies from one type to another but usually includes muds, gravels, sands, silts, clays or oozes. The soil makeup depends on the distance of the sea floor to the nearest continental shelf and th... More »

The white material in commercial potting soil is perlite or vermiculite, substances that retain water and add texture to the soil to keep it from becoming compacted. Most commercial potting soil mixtures are made up of a... More »