Abstract
Summary and conclusionsAnalyses of foliage of tomato plants grown under different manurial conditions are recorded for the four seasons 1924–7.The nitrogen content of the dried foliage shows a seasonal variation irrespective of manurial treatment.Where phosphates are omitted from the manure the potash content of the foliage is depressed. When phosphates are added to a soil from which they had previously been withheld the potash content of the foliage is increased.Where potash is omitted from the manure the phosphoric acid of the foliage is considerably increased. When the deficiency of soil potash is rectified the phosphoric acid content of the foliage is reduced.
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