Huraian
This document is part of the United States Department of Agriculture's OrganicRoots Collection. Organic Roots is a collection of the historic United StatesDepartment of Agriculture. The collection contains publications related to organicagriculture. The collection contains documents published before 1942 (beforesynthetic chemicals became widely used) that contain state-of-the-art informationand data that is still very pertinent for today's agriculture.