This section is from the book "Commercial Gardening Vol4", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
There is a vast difference between the man who grows Potatoes for private use and the one who grows for sale. In the first case quality before quantity is the maxim. In the second, quantity above all things, but quality in addition, if possible, is the guiding star. Even amongst commercial growers there is a vast difference of opinion as to which varieties are likely to yield the best returns. The Jersey growers of early Potatoes almost to a man favour the "Royal Kidney" (or International), while the Irish growers still stick to the old "Champion". Indeed some 320,785 ac, or more than half the total for Ireland, are recorded for 1908 as having been planted with this variety. "Up-to-Date", with over 92,000 ac, is a bad second; while "Beauty of Bute ", "Black Skerries ", and "Flounders" (another very old Irish Potato) are bad thirds with over 30,000 ac. each. Then come "Sutton's Abundance" (21,900 ac), "British Queen" (20,477 ac), and "Irish Whites" (17,120 ac). The rest - "American Early Rose", "White Elephant", "Gawkies", and "Scottish Triumph" - are simply nowhere at present so far as Ireland is concerned. Such fine croppers as " The Factor", "Duchess of Cornwall", "King Edward VII", etc, are grown, if at all, only in very small quantities.
The following varieties may be recommended for commercial purposes: -
Ashleaf, Duke of York, May Queen, Ninety fold, Ringleader, Early Puritan, Snowdrop.
British Queen, Beauty of Hebron, Windsor Castle, Duchess of Cornwall, Royal Kidney, Sir John Llewellyn.
Up-to-Date, Factor, Scottish Triumph, Table Talk, King Edward VII, The Scot, The Colleen.
"Boom" varieties, like "Northern Star", "Eldorado", and others, may be regarded as worthless croppers, although they have served a turn. And all the talk about a disease-resisting Potato may be considered as nonsense. Wherever life exists, disease is always possible, especially under unhealthy conditions. [J. W].