The soils were characterized for pH, measured in a soil:distilled
water suspension (1:2.5 = w:w) by electrometric method, for organic
matter content, evaluated by loss of weight after ignition at 500 °C for
8 h, and water content, determined by gravimetric method after ovendrying
to constant weight at 105 °C. These analyses were carried out
following the methods reported by Allen (1989)