This section is from the book "Commercial Gardening Vol1", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
This is obtained from malt houses and consists of the dried rootlets and shoots that have been screened from the kilned malt. Malt dust is a very useful organic manure, and may be regarded as a complete fertilizer. It is excellent as a topdressing at the rate of 30 or 40 bus. to the acre, particularly during hot, dry summers. The ash is rich in phosphates (25 per cent) and in potash (30 per cent), but contains little lime (3 per cent). The market price of malt dust varies from 35s. to 60s. per ton.