"This Catalog is divided into four sections: Section One--16mm films; Section Two--1/2" VHS video cassettes; Section Three--a variety of non-print formats of interest to library staff for development and training; Section Four--a Topic Index of all materials included in the Catalog."

"This Catalog is divided into two sections: Section One--16mm films; Section Two--a Topic Index of all 16mm films included in the Catalog. A separate Catalog includes all 1/2" VHS videotapes in the State Library's collection.

"This Catalog is divided into two sections: Section One--16mm films; Section Two--a Topic Index of all 16mm films included in the Catalog. A separate Catalog includes all 1/2" VHS videotapes in the State Library's collection.

In language that is scientifically sound but accessible to the layperson, Kathleen Woida explains how Iowa's soils formed and have changed over centuries and millennia. Its soils are what make Iowa a premier agricultural state, both in terms of acres planted and bushels harvested. But in the last hundred years, large-scale intensive agriculture and urban development have severely degraded most of our soils. However, as Woida documents, some innovative Iowans are beginning to repair and regenerate their soils by treating them as the living ecosystem and vast carbon store that they are.

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