RESULTS
 

• Most P desorption was rapid, occurring within the first 30 minutes of contact between soil and solution.

• Reactive P concentrations in solution increased as the salt concentration decreased from 0.01 M CaCl₂ to RO water (Figure 2-A), confirming that solution chemistry determines P desorption.

• The solution:soil ratio further affects RP desorption to solution, because concentrations decreased as the solution:soil ratio increased from 200:1 to 2000:1 (Figure 2-B).

• Strong correlations existed between RP concentrations and various soil P tests.  The strongest correlations were with 0.01 M CaCl₂ solution for all soil P tests (Table 2).

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