PPC. Plant Photograph Collections

Content Description The USDA Division of Forage Crops and Diseases Collection of Weed Photographs consists of approximately 1,400 negatives (glass and nitrate) and black and white photographs of weeds in different geographic locations. There are images of weed specimens, fields with weeds, experimental plots of land, weeds in suburban yards, downtown Washington, DC, corn fields, fallow fields, experiment stations, desert areas, and farm land, as well as examples of well-kept fields. There are also photographs...

Content Description The USDA Drug and Poisonous Plant Investigations Photograph Collection consists of black-and-white lantern slides with images from research projects conducted by the Drug and Poisonous Plant Investigations division of the Bureau of Plant Industry. There are also a few glass and film negatives and black-and-white photographs. Some of the slides feature images of medicinal plant gardens at various institutions across the United States. Other subjects include drug plant field plots at the USDA...

Content Description

The USDA Pear Psylla Control Investigations Lantern Slide Collection contains color lantern slides produced by the U.S. Department of Agriculture (USDA) Bureau of Entomology and Plant Quarantine, Fruit Insect Investigations, Pear Psylla Control. There are 13 slides of pears infected with pear psylla, 3 slides of maps, and a slide showing a chart of spraying operations in counties of Washington, Idaho, and Oregon in 1941.

Content Description

The Strawberry Photographs Collection contains black and white negatives, prints, and glass plate images of strawberry plants and activities related to strawberry cultivation.

Content Description The Frank Leslie Duley Photograph Collection consists of 560 photographs with negatives that document field experiments on soil moisture plots of grass, wheat, legumes, and corn, among other crops. Some images also depict erosion, equipment used to harvest, and the structures of soils. Most photographs were taken in towns and cities in Nebraska, including Alliance, Berea, Chappell, Dalton, Gurley, Hastings, and Lincoln. In these locales, photos were taken at the Agronomy Farm, Bethany Field,...

Content Description

The Tung Oil Collection consists of one manuscript "Study on Tung" by W. L. Chia (1950) and several publications and photographs.