These sources index early publications in crop and soil environmental sciences.
The Core Historical Literature of Agriculture is a core electronic collection of scanned agricultural texts. Full-text materials cover agricultural economics, agricultural engineering, animal science, crops and their protection, food science, forestry, human nutrition, rural sociology, and soil science. 1620-1999.
The Organic Agriculture Information Access is an electronic collection of historic United States Department of Agriculture (USDA) publications related to organic agriculture. In this collection, there are almost 200 documents published before 1942 (before synthetic chemicals became widely used) that contain state-of-the-art information and data that is still very pertinent for today's agriculture. Documents available JPGs and text.