PPT-The Nature of Soil

Chapter 7 Section 2 Notes Fact Finders Use your textbook pages 188 194 to fill in the blanks is a mixture of weathered rock decayed organic matter mineral fragments water amp air. 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 Qinxue Wang, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan, Tel: +81-29-850-2128; E mail: November 04 , 2013; January 28 Batkhishig(2014) Impact of Overgrazing – Properties, nature, types and significance SOIL COLLOIDS The colloidal state refers to a two - phase system in which one material in a very finely divided state is dispersed through second p texturecourtesyNASA: (Getandsample)soilhorizonsmallthesprayLetthebetweenthemoisturethroughout.OncetheStepStep(TestIf the soil: handswhenrubbedandStep themediumribbon Qinxue Wang, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan, Tel: +81-29-850-2128; E mail: November 04 , 2013; January 28 Batkhishig(2014) Impact of Overgrazing . Maxwell A. . Ayamba. . (Sheffield Hallam University/OPAL). . Introduction. Nature provides the umbilical cord linking humanity to 'Mother Earth', but in recent decades not only has the physical cord been severed, but the emotional, psychological and spiritual ones too. Reaction Velocity = A e. -. Ea. /RT. where,. A = pre-exponential factor, or y-. intercept. Ea. = activation energy of the substrate. R = universal gas constant. T = temperature, . o. K. Boone et al (2003) Nature 396:570-572.. Objectives. Identify the . v. arious roles of plants in everyday . l. ife. ;. Identify the various segments of plant and soil science. ; and . Identify important types of plants and their uses. .. Roles of Plants in . To make protein. Enzymes. Antibodies. Muscle. Explain why nitrogen atoms are . able to cycle. .. Atoms are . not created or destroyed. during chemical reactions. Only . bonds. change. N. N. N. N. N. 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.. Mississippi State University. Geosystems. Research Institute. NASA RPC Review (3/2/09). Aquarius Evaluation Team & Collaborators. MSU Team. Robert Moorhead. Xingang. Fan. Valentine . Anantharaj. 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 Figure 3-24. Fig. 3-24a, p. 69. Mosaic of closely packed pebbles, boulders. Weak humus-mineral mixture. Dry, brown to reddish-brown with variable accumulations of clay, calcium and carbonate, and soluble salts.