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abnormal active mycelium Adco amount Association Ballygowan baskets beds Belfast bell jar boiler Bulletin Bushey Heath C02-concentrations carbon dioxide Chairman chalk Chichester chips Covent Garden crop culture diam disease Editorial Executive Committee experiments fermentation fresh fruitbodies Glasshouse Graham Griffiths growing houses growth HARLOW Harpenden HERTS high temperature horse manure compost Horticultural increase J. E. R. SIMONS leaflet Littlehampton London Market method millimetre Monlough Food Production MOUNT WHITE mush Mushroom Farm mushroom growers Mushroom Industry MUSHROOM TRAYS N.F.U. MUTUAL normal oxygen P. B. Stanley-Evans pasteurization peak heating peat Phone picking pig manure compost pinheads possible publicity R. L. Edwards S. A. F. Sampson Ltd Sales SANTOBRITE scheme Smithfield Market SOLE DISTRIBUTORS Spawn Merchants spawn run sporophores stable manure stacking Stipe straw supply SUSSEX T. J. POUPART Telephone treatment ventilation volume per cent Weston-Super-Mare Wood veneers yield