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Crops and soil -- Research.

This may not be a complete list of all recordings associated with this subject. Search the entire catalog here.

PRA Archive #	Title	Description	Genre	Broadcast Date
KZ1519	New paths to healthy soil / Peter Tompkins ; interviewed by Barbara Dunlap.	Tompkins, author of Secrets of the Soil, provides unusual but proven methods for producing...		KPFK, 18 July 1989.
KZ1529	Permaculture comes home : a conversation with Bill Roley / interviewed by Barbara Dunlap.	Bill Roley, director of The Permaculture Institute of Southern California, conducts a tour of...		KFPK, 5 Dec. 1989.