PPT-Lab 9 - Soil Water

Author : calandra-battersby | Published Date : 2016-08-12

Bulk Density BD Mass Soil Volume Soil Porosity PS Volume Voids Volume Soil 1 BD PD Water Content theta Volumetric v Volume Water Volume Soil g BD

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Lab 9 - Soil Water: Transcript


Bulk Density BD Mass Soil Volume Soil Porosity PS Volume Voids Volume Soil 1 BD PD Water Content theta Volumetric v Volume Water Volume Soil g BD. 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 Doug . Cobos, Ph.D.. Decagon Devices and Washington State University. Two Variables are Needed to Describe the State of Water. Water content. and. Quantity . Extent . . . Related Measures. Douglas R. Cobos, Ph.D.. Decagon Devices and Washington State University. Background. About the presenter. Ph.D. in Soil Physics, 2003, University of Minnesota. Director of Research and Development, Decagon Devices, Inc.. texturecourtesyNASA: (Getandsample)soilhorizonsmallthesprayLetthebetweenthemoisturethroughout.OncetheStepStep(TestIf the soil: handswhenrubbedandStep themediumribbon Topics. Soils. Soil water properties. Soil water balance. Reading: Applied Hydrology Sections 4.3 and 4.4 . (Green-. Ampt. method). Soil Map of the United States. Developed from SSURGO – Soil Survey Geographic Database. Doug . Cobos, Ph.D.. Decagon Devices and Washington State University. Two Variables are Needed to Describe the State of Water. Water content. and. Quantity . Extent . . . Related Measures. 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. Why is starch agar used?. -To see if saliva was present and broke down the starch.. Positive control . –used to show what the change looks like. Negative control. – used to what no change looks like. 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. 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 in a mature temperate forest . under . elevated. . CO. 2. . Susan Quick . SEQ616@student.bham.ac.uk. , . Giulio . Curioni, Phillip Blaen, . St. e. fan . Krause, . A. . Rob. . MacKenzie. . https. Soil . is the thin layer of organic and inorganic materials that covers the Earth's rocky surface. . Soil . is composed of particles of broken rock that have been altered by chemical and mechanical processes that include weathering and erosion. Soil consists of major components – . 1. . . INTRODUCTION. Civil and environmental engineering includes the conception, analysis, design, construction, operation, and maintenance of a diversity of structures, facilities, and systems. All are built on, in, or with soil or rock. The properties and behavior of these materials have major influences on the success, economy, and safety of the work. 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.

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