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Table 5 Slopes (%P mo-1) of the significant linear regressions of phosphorus content as a function of time. * = slopes are significantly different from 0 at P < 0.05, ** = slopes are significantly different from 0 at P < 0.005, and *** = slopes are significantly different from 0 at P < 0.0001
Site Condition Sp 13 months 28 months
P slope r2 P slope r2
SAair Ag -0.0005* 0.338    
SAair Rm -0.0010* 0.311    
SAsurface Ag     0.0003* 0.329
SAsurface Rm     0.0005** 0.564
SAburied Ag     0.0010** 0.589
SAburied Lr     0.0010** 0.524
SAburied Rm     0.0005** 0.413
SBair Lr -0.0010* 0.257    
SBair Rm -0.0010* 0.274    
SBsurface Ag     0.0003** 0.525
SBburied Ag     0.0002* 0.198
SCair Ag        
SCair Lr -0.0004* 0.298    
SCair Rm -0.0010* 0.276    
SCsurface Ag     0.0002* 0.188
SCburied Lr     0.0003* 0.378
SDair Ag -0.0010** 0.582    
SDair Lr -0.0010** 0.497    
SDair Rm -0.0010*** 0.692    
SDsurface Rm     -0.0002* 0.3
NHBair Rm -0.0010** 0.517    
NHBsurface Ag 0.0010** 0.532 0.0010*** 0.684
NHBsurface Lr     0.0010*** 0.731
NHBsurface Rm 0.0010* 0.265 0.0010*** 0.831
NHBburied Ag 0.0010* 0.358 0.0010*** 0.697
NHBburied Lr 0.0010* 0.42 0.0010*** 0.793
NHBburied Rm     0.0010*** 0.66

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