Another crop of Oyster mushrooms has appeared over the weekend, grown on used coffee grounds, within a plastic tub. Nothing but ambient heat to propel growth so there is no carbon input during the growth process, Fantastic!
Now for some stats:
Total weight of substrate – 2.5kg
Total yield – 170grams (6.8% of substrate)
Economic value of yield – £24
With regards to the economic value of this yield, One would like to point out the fact that to order a 25g portion of dried oyster mushrooms from online retailers will attract a postage charge that is larger than the price of the portion itself! In addition, food that has travelled long distances has less freshness and nutritional value than food that has not travelled long distances. This Kirlian photograph of a commerically grown mushroom and an organically grown mushroom adds weight to the case for increased local food production on the basis of the vitality of the food consumed.
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