POTASH AND POTATOES.
The effect of potash in increasing the disease resistance of potatoes is strikingly illustrated by figures obtained last year at the Kirton Agricultural Institute’s experimental farm, England. In one series of plots, the percentage of healthy plants rose from 42.7 where no potash was applied, to 54.1 where 2 ewts per acre of sulphate of potash was used. The duplicate series showed an even more marked difference, the health percentage rising from 28.5 to 58.8. The lowergrade potash salts were found to be much 'less efficient in this respect than the sulphate or muriate. “It is necessary to emphasise the fact,” said the experimenters in their report: “that potash is the determining factor in promoting the disease resistance of plants, in so far as this resistance can be affected by manuring. Nitrogen and phosphates, the former in particular, are liable to exercise an adverse effect when used in excessive amounts. These facts must be kept in view when drawing up any scheme of manuring, or devising formulae for compound manures.
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Manawatu Herald, Volume XLVII, Issue 2959, 7 November 1925, Page 3
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173POTASH AND POTATOES. Manawatu Herald, Volume XLVII, Issue 2959, 7 November 1925, Page 3
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