ATTRA publications

Extensive list of publications, a lot of free PDF's.

ATTRA is a program developed and managed by the National Center for Appropriate Technology (NCAT). The majority of funding for ATTRA is through a cooperative agreement with the United States Department of Agriculture's Rural Business-Cooperative Service.

The three sisters

"The three sisters" is a gardening system that was used by the native Americans. They used corn, beans and squash as companion plants. These crops add to each other on a structural and nutritional level.

Subscribe to gardening