Fernow Forest Case Study

This page is intended to help you with your “methods” section…

How to measure SOIL pH

  • Standard pH method – [LINK 1 – University of Georgia’s Agricultural and Environmental Services Laboratories]
  • University of Minnesota Soil Testing Laboratory

How to measure TOTAL NITROGEN (N) in the soil

  • University of Minnesota Soil Testing Laboratory
  • A method for finding useable nitrogen [Link 1 – an environmental scientist at MadSci.org]
  • Kjeldahl method [Link 1 – YouTube video summary done by students] [Link 2 – an environmental scientists at MadSci.org]

How to measure PHOSPHORUS (P) in the soil

  • Mehlich 1 method [LINK 1 – University of Georgia’s Agricultural and Environmental Services Laboratories] [LINK 2 -The Southern Cooperative Series Bulletin]
  • Mehlich 3 method [LINK 1 -The Southern Cooperative Series Bulletin]
  • Bray P 1 method [LINK 1 – University of Minnesota’s Soil Testing Laboratory]  [LINK 2 – University of Georgia’s Agricultural and Environmental Services Laboratories]
  • Bray and Kurtz P-1 method – [LINK 1 – The Southern Cooperative Series Bulletin]
  • Olsen P method [LINK 1 -The Southern Cooperative Series Bulletin] [LINK 2 – University of Minnesota’s Soil Testing Laboratory]

How to measure SODIUM (Na+) in the soil

  •  Cation Exchange Capacity (or CEC) method – [LINK 1 – Clemson University]
  • Neutral 1 Normal Ammonium Acetate procedure – [LINK 1 – University of Georgia’s Agricultural and Environmental Services Laboratories]

How to measure CHLORIDE (Cl-) in the soil

  • Colorimetric – Autoanalyzer method [LINK 1 – University of Georgia’s Agricultural and Environmental Services Laboratories]

How to measure IRON (Fe) in the soil

  • DTPA method [LINK 1 – University of Georgia’s Agricultural and Environmental Services Laboratories]
  • University of Minnesota Soil Testing Laboratory

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