PPT-Soil Water Potential Measurement

Doug Cobos PhD Decagon Devices and Washington State University Two Variables are Needed to Describe the State of Water Water content and Quantity Extent Related Measures. Doug 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.. 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.. 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. Dr. Greg Butters. Soil Physics. Department of Soil and Crop Sciences. A lecture for SOCR 571- Foundations of Soil Science. Soil water in a complex, multiple process domain. Outline. Fundamental relationships. Improving accuracy of dielectric soil moisture sensors. Douglas R. . Cobos. , Ph.D.. Decagon Devices and . Washington State University . Outline. Introduction. VWC definition. Direct vs. indirect measurement methods. 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. UNIT 1: MEASUREMENT. LOOK AT THE PICTURES. IN PAIRS MAKE QUESTIONS. . UNIT 1: MEASUREMENT. MEASUREMENT QUIZ. UNIT 1: MEASUREMENT. 1. . What. . can. . be. . odd. and . even. ?. UNIT 1: MEASUREMENT. 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.. . Jesse Libra. CE 394K. Flying J . Junction . Site. Issues with the site:. In the Floodway/Floodplain. Drains towards the North Llano River via a . TxDOT. drainage ditch.. *Southeastern Hill Country: Mason, Llano, . 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. A . number. A . unit. Example: . 5. cm. Scientists (and we will) use the SI system. Système. International . d’unités. The SI units = METRIC. There are only 3 countries in the whole world using the ENGLISH SYSTEM of measurement. . Rani Abraham. Syllabus portions. The . chemistry of . processes in Lithosphere; Redox status in soil. . pE. pH predominance diagrams for . redox sensitive . elements. Acidity in soil materials. Acid neutralization capacity and . 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 – .