Table 2.

Phosphorus (P) sorption isotherm variables (S_max, K_L and r²) based on the Langmuir equation calculated for each land use (forest and soya bean fields converted to soya bean in 2003, 2004, 2007 and 2008). Soil samples were taken in January and February 2009 at Tanguro Ranch in Mato Grosso, Brazil. Langmuir equations for each land use were based on the data from seven soil cores.

land use	depth	KL	Smax	r2
forest	10	0.0281	834	0.9422
	20	0.0198	1270	0.9995
	50	0.0107	2320	0.9997
soya bean 2003	10	0.0347	728	0.9964
	20	0.0186	1340	1.0000
	50	0.00485	5120	0.9997
soya bean 2004	10	0.0272	901	0.9988
	20	0.0277	904	0.9983
	50	0.00784	3190	0.9995
soya bean 2007	10	0.106	239	0.9971
	20	0.0975	262	0.9989
	50	0.0345	737	0.9998
soya bean 2008	10	0.0342	709	0.9861
	20	0.00866	2870	0.9893
	50	0.00114	21 800	0.9991
mean		0.026	2640