and the Monaghan phase III is spawned alternately with A15 and Amycel XXX. McDon from Northern Ireland supplies the casing soil. Four litres of water per square metre is typically sprayed on the compost on the filling machine, and up to 12 litres is subsequently
given. On the day after filling CAC is applied manually by scattering compost over the beds, and mixing it into the upper layer with a ruffling machine. Over the course of the next three days, another 12 litres is sprayed, before the surface is ruffled for the second time on day five. Day seven sees the start of cool down. The air temperature is carefully reduced to 19 degrees, and the CO2 from 3500 to 2000 ppm in about six days. The next management decision is determined by the number of pinheads on the beds. Generally, the air temperature is lowered again in stages to 17 degrees until a sufficient number of pinheads develop, but this can vary.
When the first flush starts, the air temperature is set to 17.5 degrees Celsius. After the first day of picking, when the com- post temperature increases, three litres of water/m2 is sprayed. On the day the last mushrooms are picked, an additional 10 litres is given, followed by up to another four litres the day after. After the first flush, the air temperature is increased to 19.5 degrees then lowered to 18 degrees when the pins in the second flush start to emerge. After the second flush, the beds are sprayed with six-eight litres/ m2, the air temperature is set to 19 degrees, then lowered again to 18. When the third flush has established well on the beds, another four litres
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“We’re very
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is sprayed. Fegan tries to keep flies under control by spraying nematodes onto the beds after ruffling and on the first flush. The farm employs 50 people, and produces around 375 kg of mushrooms per ton of compost.
MUSHROOM BUSINESS 41
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