Table 1.

Correlation coefficients (r values) for relationships among phosphorus labile and organic forms and phosphatase activities, soil traits and climatic variables from our database: Acid phosphatase (Ac. Pasa), alkaline phosphatase (Alk. Pasa), pH, total Carbon (TC), microbial Carbon (MicroC), total Nitrogen, (TN), Clay content (% Clay), Mean annual precipitation (MAP), mean annual temperature (MAT), thermal amplitude (AMP).

	Ac. Pasa	Alk. Pasa	pH	TC	MicroC	TN	% Clay	MAP	MAT	AMP
TP	−0.027	0.172	−0.14	0.21	0.15	−0.036	−0.126	0.26*	−0.228*	0.195*
P org	0.285*	−0.183	0.016	0.502**	0.419*	0.436**	0.878	0.492***	0.024	0.267*
Pav org	0.527**		−0.634***	−0.045	0.307	0.016		−0.063	−0.143	−0.298
P-Olsen	0.043	0.548*	−0.003	0.08	−0.368*	−0.167	0.426	0.114	0.29*	0.084
P-Bray	−0.105	0.176	0.459**	−0.318	−0.536	−0.165	0.168	−0.356*	0.442**	−0.115
resin-P	−0.185		0.172	−0.249		−0.08	0.064	−0.104	−0.06	0.21

Significance levels are highlighted by * for p < 0.01,**p < 0.001, ***p < 0.0001.