Mushroom Soil, Banjo Craft, and Other Profiles

By The Mother Earth News Editors
Published on November 1, 1978
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Dr. Kurtzman examines a fungal specimen grown in straw, aka "mushroom soil."
Dr. Kurtzman examines a fungal specimen grown in straw, aka "mushroom soil."
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Jeanne and Norbert Pierlot work on a ceramic piece. Though hard to see, the inset is Chateau Ratilly.
Jeanne and Norbert Pierlot work on a ceramic piece. Though hard to see, the inset is Chateau Ratilly.
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Biology professor and environmental activist Wayne P. Mueller at work in the field.
Biology professor and environmental activist Wayne P. Mueller at work in the field.
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Don Thomas displaying the product of his banjo craft.
Don Thomas displaying the product of his banjo craft.
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Folktellers Barbara Freeman and Connie Regan.
Folktellers Barbara Freeman and Connie Regan.
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Sunday Ajayi handling an African giant rat.
Sunday Ajayi handling an African giant rat.
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Michael Epp and Bob Shannon in the space that became People-Space, their alternative architecture business.
Michael Epp and Bob Shannon in the space that became People-Space, their alternative architecture business.
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Left: Mushroom soil developer Dr. Ralph Kurtzman. Right: Banjo craft-er Don Thomas.
Left: Mushroom soil developer Dr. Ralph Kurtzman. Right: Banjo craft-er Don Thomas.

In celebration of little-known MOTHER EARTH NEWS-type folks from all over.


Dr. Ralph H. Kurtzman, Jr.: Mushroom Soil

Rumpelstiltskin could turn straw into gold, or so the story goes. The rest of the world has met with little or no visible success in its effort to make use of the most abundant of agricultural wastes … until Dr. Ralph H. Kurtzman, Jr. came along. Dr. Kurtzman—biochemist and plant pathologist with the Department of Agriculture’s Western Regional Laboratory in Berkeley, California—has discovered a method for turning straw into mushrooms! “Not the common button variety,” says Dr. Kurtzman, “but oyster mushrooms: Pleurotus ostreatus. A ton of straw will produce about an equal weight of the fungi, leaving behind about 700 pounds of nitrate-rich soil residue to use as fertilizer. Though I’ve not yet tested all varieties of straw, rice and wheat straw have proved to be favorable growing mediums for the mushroom spawn … whereas barley straw has not.

“In addition,” says Dr. Kurtzman, “shredded magazines can be mixed with the straw as a medium for growing the crop.” Dr. Kurtzman’s experiments with magazine paper have opened the door to recycling a paper product which has generally been considered unusable because of its clay coating. According to Dr. Kurtzman, as long as at least one half of the mixture is straw, the mushroom spawn growing in it should do quite well. And although magazine inks contain a degree of lead, Dr. Kurtzman’s recent X-ray spectrometer test showed absolutely no lead transfer from the paper to the mushrooms.

“Moreover,” Ralph Kurtzman asserts, “oyster mushrooms are capable of playing an important role in the use of straw to produce beef.” Straw is normally not used as cattle feed because it contains lignin, a complex chemical which must be broken down before the fodder can provide any nutritional benefit for the livestock. Oyster mushrooms have the ability to break down the lignin, thus transforming straw into wholesome cattle feed. This means that growers of oyster mushrooms can harvest some of their crop for the table and retain a quantity of feed for their livestock as well.

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