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USC - ENST 320 - Class Notes - Week 5

Created by: Molly Waring Elite Notetaker

USC - ENST 320 - Class Notes - Week 5

School: University of Southern California
Department: Environmental Studies
Course: Water and Soil Sustainability
Professor: Jill Sohm
Term: Spring 2018
Tags:
Name: Soil Application
Description: notes from the first half of the soil powerpoint
Uploaded: 02/14/2018
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background image Soil Science and Application  -  Soil≠dirt  o  Dirt: largely mineral based; comprised of pebbles and finely ground rock 
o  Soils: mineral based; comprised of plants, fungi, animals and other organics as 
well  -  Soil (geologic definition): loose surface of the earth as distinguished from soil bedrock  (support of life not required)  -  Soil (pedospheric definition): loose, altered surface material of earth which  nourishes/supports organisms (includes rocks, water, snow, air)  o  Everything included in mineral material, not just the mineral material itself  -  Pedosphere  o  Soil participates in global cycles and life of terrestrial ecosystems 
o  Soil forms a transition zone between hard rock and atmosphere above (containing 
water, plants, and other organisms)  o  Mineral participles form the skeleton of the soil that defines pore spaces 
o  Soil minerals (lithosphere) provide charges, reactive surfaces that absorb water 
and cations dissolved in water (hydrosphere) and gases   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
-  Four main parts of soil  o  1. Solutions (water)à water between soil particles, provides soil nutrients to  plants  o  2. Airà space between soil particles; gases from above ground, organisms, and  microorganisms below ground 
background image §   Not necessarily the same type of air as we breath  §   Consider all the respiration from the organisms in the soilà contribute to  the air in the soil  o  3. Minerals (inorganics)à solids for plant anchorage, nutrients from parent  material  o  4. Organicsà plant/animal, nutrients/structural support 
o  Space portion of soil= solutions, air 
o  Solids portion of soil= minerals, organics 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
-  Soils are ecosystemsà living things above and below the ground determined by  properties of soil  o  Plant roots, fungi, microbes, burrowing animals, insects  -  Solids provide ecosystem services  o  Water purification and soil contaminant reduction 
o  Climate regulation 
o  Nutrient cycling 
o  Habitat for organismsà including medium for plant growth 
o  Flood regulation 
o  Source of pharmaceuticals and genetic resources 
o  Foundation for human infrastructure 
o  Provision of construction materials 
o  Cultural heritage 
o  Provision for food, fiber, and fuel 
o  Carbon sequestration 
-  Soil natural capitalà soil properties, soil processes 

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School: University of Southern California
Department: Environmental Studies
Course: Water and Soil Sustainability
Professor: Jill Sohm
Term: Spring 2018
Tags:
Name: Soil Application
Description: notes from the first half of the soil powerpoint
Uploaded: 02/14/2018
5 Pages 34 Views 27 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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