¹ Codes of tillage practices are reported in Table I.

² Hyphens are used to indicate the range of variation of values.

³ Commas are used to separate different years of study.

⁴ N: natural rainfall; S: simulated rainfall.

⁵ C: contoured slope; U/D: up-and-down slope.

⁶ Loc: seed row localisation of the pesticide treatment.

⁷ Average results for 9 years of study.

⁸ Numbers in parenthesis indicate the age in years of the soil tillage.

⁹ M.: maize = residues restituted; Sil.: silage = no crop residues.

¹⁰ Inc.: preplant soil incorporation of herbicide.

¹¹ Cov.C: cover crop.

¹²I_Var: variable rainfall intensity; I_cons: constant rainfall intensity. a

¹³ Soy: continuous soybean; S/W: soybean/wheat rotation.