1. To determine the relationship between the Ammonium acetate and Mehlich III extractable K, Ca, Mg, Na for Missouri soils using Ind uctively Coupled Plasma (ICP) Spectrometry and Atomic Absorption (AA) Spectrometry. 2. To determine the relationship between the Bray I and Mehlich III extractable P using ICP and the colorimetric methods for Missouri soils. 3. To determine the relationship between the DTPA and Mehlich extractable Zn, Fe, Cu and Mn for Missouri soils using ICP and AA