SOIL STERILISATION
SIMPLE OVEN TO BAKE SOIL.
Sterilising the soil by heat is ideal from a scientific point of view, but not as practicable for the home gardener who naturally does not want to spend money on costly and sometimes bulky apparatus. True, there are now small sterilising plants available at comparatively moderate prices. Some gardeners may like to build a simple oven in which to bake the soil. Within reason the more airtight these ovens can be made the better. Of course there must be some outlet for expanding air, otherwise the oven might explode. It is not desirable that all moisture should be driven off from the soil and the latter reduced to an ashy condition. In the best sterilisers the soil is put in slightly moist and this water is converted into steam, which carries the heat safely and evenly to all parts. In this way the necessary destruction of insects and spores of disease is effected. The ideal temperature for sterilisation is in the neighbourhood of 212 degrees and this should be maintained for one hour for full effect.
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Wairarapa Times-Age, 20 January 1939, Page 2
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183SOIL STERILISATION Wairarapa Times-Age, 20 January 1939, Page 2
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