England resumed day three at 337 for 7, with Matt Prior (38) and Graeme Swann (21) at the crease.
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Day 2 round-up:
Joe Root made the second Test worth waiting an extra day for as he notched his maiden Test century on his Headingley home turf in leading England to 337 for 7 against New Zealand on Day 2
It was the same scenario for fellow Yorkshire batsman Jonny Bairstow, 23, but without the pre-match hype. Covering for the injured Kevin Pietersen, Bairstow made 64 and still seeks his first Test century.
Boult and the new ball ended the Root and Bairstow show. Boult's three late wickets, all caught behind by skipper Brendon McCullum, who has five in the innings, dropped England from 270 for 4 to 286 for 7. Prior and Swann made it a mere blip.