Many of the foregoing remarks are clearly based on points made in earlier articles in this issue, but few specific citations have been made to those sources, since it is hoped that readers who reach this contribution will already have perused the earlier ones. The following references however are to papers published elsewhere:
2.
HudsonJ P (1972) Agronomic implications of long-term weather forecasting, in Weather Forecasting for Agriculture and Industry (Ed TaylorJA) David and Charles, London
3.
SingerM C, SmithB D (1975 and 1976) Long Ashton Research Station Reports for 1974 p. 116 and 1975 p. 112
4.
Wilkins SheenM, WilkinsH, WainR L (1976) Nature259, 392
