PPT-State Envirothon 2017 - Soils

Dennis Brezina USDANatural Resources Conservation Service Resource Soil Scientist Bryan Area Helping People Help the Land Texas State Envirothon http prtluhcledutexasenvirothonresourcessoils. Physical . weather reduces the particle size of rocks and in doing so prepare the material for chemical weathering. The rate of all chemical reactions involving solids is determined by the amount of exposed surface area. These four drawing illustrates sequentially dividing particles into smaller particles. Assuming a dimension of 1 cubic centimeter . What is soil?. Soil is the layer of loose material on the. earth’s surface. Without soil, we would not. be able to grow crops and plants. . Therefore, there would be no food for. animals or for people. It is therefore a very. What is soil? . Soil: A natural body of mineral (non-living) and organic (living) material that forms on the surface of the earth, and is the medium for plant growth.. Forms over time from the decay of plants and organisms on the surface, and the break-down (weathering) of rocks, minerals, and sediments at, and beneath, the surface.. What are soils?. Soils are a mixture of tiny particles of rock, dead plants and animals, air and water.. Different plants grow better in different types of soil. .. Clay Soil. Clay soil.  is an orange or blue-. Russell Yost. 1. , . Bao-Shen. Li. 2. , Prof. . Xiaolin. Li. 2. , ZuChao. 3. 1. Tropical Plant and Soil Sciences. University of Hawai`i at . Manoa. Honolulu, Hawai`i. 2. China Agricultural University, Beijing, China. Extensively developed in Antarctica and rare outside of Polar regions. Characterized by a specific lithology due to penguin nesting behavior. Includes a combination of soil, pebbles, guano, highly rich in organic. University of California Cooperative Extension. Our agenda for today. Basic soil principles. The things we add to our soils. Amendments. Mulches. Compost. Fertilizers. Soils for the Gardener. Why are Soils Important to Sustainability?. Tundra comes from the Finnish . tunturia. ,. which means barren . or treeless land. However, the . tundra is not really barren. A . diversity of low growing plants . – including a few dwarf trees . Most forests are not too . hot. , or not too . cold. , and have moderate amounts of precipitation. . ALFISOL. Moderately Weathered. SPODOSOL. Sandy, Acidic. There are two main types of forests. . Pine forests have ashy white layers (. What is a . WETLAND. ?. Peat Bogs: Poor Man’s Charcoal. HISTOSOL. Organic, Wet. What are . hydric. soils???. Hydros. = water in Latin. Surface layers are usually . BLACK. The subsoil is . GRAY. , and has freckles of bright . Matthew 13. Mark 4. Luke 8. The Different Soils. Wayside Heart. Stony Heart. Thorny Heart. Good Heart. Emphasis Upon Hearing the Word of God. Parable begins with, . “Listen!” . (Mark 4:3). Ends with Jesus crying out, . Hydrology. Hydric soils. Hydrophytic plants. Hydric soil. soil that is saturated, flooded, or ponded long enough . during the growing season. . to develop anaerobic conditions in the upper part.. Oxygen is removed from groundwater by respiration of microbes, roots, soil fauna . The . 6. Functions of Soils. SOIL. Medium for plant growth. System for water supply and purification. Recycling system for nutrients and organic wastes. Habitat for . soil organisms. Engineering medium. Specialist, USDA-NRCS. West Wareham, MA. Soils and Geography. Soils found in MA and HI are as different as the states of MA and HI. Crops. Cranberries . Macadamia Nuts. Pop Culture. Cheers. Hawaii 5-0.