Seeding methods
Zero-till seeding with double-disc opener (ZT)
No-till seeding with tine and knife-point (NT)
Full cut seeding with sweeps (FC) up to 2002, then ZT from 2003 onwards (FCZT)
Full Cut (FC) seeding with sweeps in 1999, then NT from 2000 onwards (FCNT); lime was reapplied to this treatment only at the respective rates in 2004
Interaction between seeding system and lime application rate on soil pH in the middle block in 2005 for (a) 0–10 cm and (b) 10–20 cm (error bars are ±LSD, P ≤ 0.05). Note that lime was re-applied in the FCNT treatment in 2004 using the same rates as applied at the start of the experiment.