400 would work if temps peaked at 23-24max June July with one proviso... 200 mm needs to fall april, may and june.
400 is a bloody disaster if 50 or less falls may june.
Sodden winter followed by dry or very dry early summer is the single worst scenario.
Dry winter followed by cool and wet ( by our standards ) early summer is "grain shed isn't big enough"
300-350 mm being enough here is a laughable idea ( otherwise you would cry).
91/92 growing season iirc, maybe 92/93 was 12.5 rain-guage inches for the growing year, and it wasn't funny.
Arable Conversations: Alternative markets and new cash crops 11.30 – 12.30 on 29th June 2021
Join us at Arable Scotland on 29 June at 11.30 am for an interactive ‘Arable Conversation’ that will discuss ‘Alternative markets and new cash crops’. The session will cover the seasons market potential and the current rollercoaster grain prices. New crops being trialled in Scotland, opening new doors and opportunities for the cereals sector will also feature. Chris Leslie from AHDB, will lead the discussion and be joined by the following panellists.