Extraction Techniques
The surface horizon of three soils
were used to determine the
extractability and recovery of added organic P compounds (Table 1).
Several combinations of the extracting solution composition, extraction
time, amount of soil, and amount of added organic P were tested (Table 2).
All extractions were conducted at 25°C, to avoid potential compound
degradation from elevated temperatures. The initial extraction procedures
were as follows: 4 or 8 mg of ATP was added to 4 or 8 g of soil (screened
to