This method is required to adjust soil chemical results based on air-dry samples to an oven-dry (105oC)
basis. When the air-dry moisture content (M%) is known, the correction from air-dry
to oven-dry is as follows:
Oven-dry result = [Air-dry result x (100+ M%)]/100
Dry ashing without HF, and uptake in HCl. AAS-Flame finish, without background correction, and using air acetylene.
Wet digestion - open system without HF, and final medium H2SO4 (includes Kjeldahl - not quantitative for NO3). Spectrophotometry (manual) finish.