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D4529-1headline bar  Graduate student collecting tree tissue samples**Image Number D4529-1** Iowa State University M.S. graduate student Ala' Khaleel collecting tree tissue samples in a ponderosa pine windbreak in Sargent County, ND planting in 1936 by the Prairie States Forestry Project**.**  Photo by Tom Sauer  640 pixels wide: (D4529-1.jpg)   Please visit our Image Gallery.


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