Table 1. Soil abiotic characteristic at sampling sites.

Sampling site	Pa	Kb	Clay	OMCc	pH
	mg kg−1		%		H2O
Júlio de Castilhos	24.3	166	38	3	5.1
São Borja	13.5	158	26	4.8	5.3
Vacaria	6.5	151.3	42.9	5.6	6.0
Campina das Missões	18.9	167	36	2.3	5.4
Guarani das Missões	27.2	148	37	3.7	5.8
Boa Vista do Cadeado	9.6	86	61	2.8	5.5

^aP = extractable phosphorus;

^bK = extractable potassium;

^cOMC = organic matter content.