Complex sentence: The marketable harvest from the 1942-43 harvest collected by the pool was 18 million bushels Early estimates of the following years production was about 19 million bushels of which 16.5 million were likely to be marketable.
Split into simpler sentences: The marketable harvest from the 1942-43 harvest collected by the pool was 18 million bushels. An early estimate of the following year's production was about 19 million bushels, of which 16.5 million was likely to be marketable.