Plant Analysis

Note: This is a verbatim reproduction of SWAT lab analysis methods previously posted on the SWAT webpage prior to lab closure.

Archive of NMSU SWAT Lab References for Plant Analyses


Test Procedure Reference
Digestion Microwave 2
Grinding Cyclone Mill 1
Standard package (P, K, Ca, Mg, Fe, Mn, B, Zn, Na) and other metals ICP 1, 4
Nitrate – Nitrogen or Chloride Water or Acetic Acid Extract 1
Kjeldahal – Nitrogen Block Digestor 1
Phosphate – P. Potassium, Ammonium, and Sulfate 2% Acetic Acid Extract 1
Special – As, Se, and Mo ICP-MS 3



1. Gavlak, R. G., D. A. Horneck, and R. O. Miller. 1994. Plant, Soil and Water Reference Methods for the Western Region. W. Reg. Ext. Publ. 125.

2. Jones, Jr., J. Benton, Benjamin Wolf and Harry A. Mills. 1991. Plant Analysis Handbook 1. Methods of Plant Analysis and Interpretation. p. 199-200. Macro-Micro Publishing, Inc.

3. Long, Stephen E. and Theodore D. Martin. 1991. Determination of Trace Elements in Waters and Wastes by Inductively Coupled Plasma – Mass Spectrometry. USEPA Method 200.8, U.S. Gov. Print. Office, Washington D.C.

4. U.S. Environmental Protection Agency Staff. 1982. Inductively Coupled Plasma Atomic Emission Spectrometric Method for Trace Element Analysis of Water and Wastes. USEPA Method 200.7, U.S. Gov. Print Office, Washington, D.C.