PPT-Soil Structures

A Explain the nature and composition of soil Soil is the outer layer of the earth Dirt is displaced Soil Composition of average soil a 25 Air b 25 Water c 5 Organic Matter d 45 Mineral Matter. They generally are less than 2 inches thick and are massive Crusts are created by the breakdown of structural units by flowing water or raindrops or through freezethaw action Soil crusts are generally only a temporary condition Typically the soil im The soil should be neutral or slightly acidic with pH 65 to 70 having high organic content Very light sandy soils are not recommended owing to their poor moisture holding properties Climate Light Light is one of the most important climatic factors i Soil Ribbon and classes video . Write down the following questions on a . spare . piece of paper. . 1. What are the steps . for soil texture?. 2. . What . does the length of a ribbon tell you?. 3. . What . The delicacy of clay crystals. Soil crumb structure. Do not abuse clay!. Add plenty of organic matter. Avoid over-cultivation especially rotary cultivation. Use lime of gypsum to improve structure. Use green manure or mulch to cover the surface. Are they different? and . Do they matter?. Susan Andrews, National Leader. Soil Quality and Ecosystems. National Soil Survey Center. August 9. , . 2012. Soil Quality Definitions. “fitness for use”. The top layer of Earth’s crust where most plants grow. It contains minerals, decaying organisms, water, and air. It is divided into . horizons. , which are layers . parallel to the Earth’s surface in which . Objectives. Define: ammonification, ammonium, bulk density, . denitrification. , immobilization, leaching, mineralization, nitrate-N, nitrification, soil nitrogen fixation, volatilization. List and describe inherent factors that affect soil nitrogen. Uppermost layer of earth’s crust that supports plants, animals and microbes. Soil Forming Factors. Parent Material. Time. Climate. Vegetation & Organisms. Topography. 1. Parent Material. Refers to the rock and minerals from which the soil derives.. . 2015 SAM FALL FORUM . . SITE ASSESSMENT AND MITIGATION PROGRAM. . October 13, 2015. s. oil test interpretation. Weston Miller, . OSU Extension Service. Preview of presentation. Safety precautions. General . soil quality assessment . How to take a soil test. What to test for. Interpreting results. Geochemistry and mineralogy of volcanic soils from Ocean Fogo island Cape Verde Rosa MarquesA C M Isabel PrudncioA C Fernando RochaB C Eduardo Ferreira da SilvaB CInstituto Tecnolgico e Nuclear EN 10 Link MBTOC98pdf United Nations Environment Programme Industry and Environment 1998 OzonAction http//wwwunepfr/ozonaction/information/mmcfiles/2294-epdf Additional Review Articles Rosskopf Erin N D 1are people on the earthMillions of species and billions of organisms151bacteria algae microscopic insects -tion of biomass anywhere on the planet Microbes which make up only one half of one percent o Homologous structures. Human Arm . Bat Wing . Whale Flipper. . Analogous. Structures . Similar functions but NOT structurally related. . Insects are arthropods and birds are vertebrates. . The wing of a bird and the wing of a butterfly are examples of .