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Laboratory Analyses Procedures

For more information concerning the topics below, please contact Anita Falen at

  • Standard and Dilution Making Protocol
  • Bromide Determination with the Lachat
  • Chloride by Mohr Agrentometric Method
  • Melanic Index (MI)
  • Loss on Ignition (LOI)
  • Iron Oxide Paint - Indicator of Reduction In Soil (IRIS) tubes
  • Collection and Preparation of Soil Monoliths
  • Soil Nitrate and Ammonium Nitrogen Methods
  • Available Soil Phosphorous and Potassium using the iCAP-ICP
  • 1:1 pH and 1:2 CaCl2 pH

  • Bulk Density (BD) of Soil Clods using Saran Resin
  • Water Retention by Pressure Plate Extraction
  • Atterberg Limits
  • HOBOware Water and Temperature Data Transfer

  • Soil Sample Preparation
  • Soil Texture Classes
  • Particle Size Distribution (PSD) - Centrifuge
  • Particle Size Distribution (PSA) - Centrifuge, silts separated
  • Particle Size Distribution (PSD) - Pipette
  • Particle Size Distribution (PSD) - Coulter Counter

  • Extractable Cations and Cation Exchange Capacity (CEC)
  • Exchangeable Hydrogen

  • Sodium Pyrophosphate (Pyro) 
  • Sodium Citrate, Bicarbonate, Dithionite (CBD)
  • Ammonium Oxalate (AOD) and ODOE
  • Tiron Dissolution

  • Clay Identification Using X-ray Diffraction
  • Operation of the Siemens D5000 Diffraktometer Instrument
  • Sand Preparation for Optical Mineralogy

  • NaF pH
  • New Zealand Phosphorus Retention
  • Phosphorus Isotherm 
  • Exchangeable Acidity and Aluminum
  • Exchangeable Aluminum 

  • iCAP-ICP Daily Operation Procedure
  • Operation Manual for the FIAlab Instrument

Plant, Soil & Entomological Sciences

Plant, Soil and Entomological Sciences

Physical Address:
E. J. Iddings Agricultural Science Laboratory, Rm 242
606 S Rayburn St

Mailing Address:
875 Perimeter Drive MS 2339
Moscow, ID 83844-2339

Phone: 208-885-6274

Fax: 208-885-7760