Tracing of plot J-19-P to show trend of black grama through 1919, 1920 (good years) and 1921, 1922 (drought years). Plot clipped to correspond to proper grazing. Original photo number 180817.
Description: Tracing of plot J-19-P to show trend of black grama through 1919, 1920 (good years) and 1921, 1922 (drought years). Plot clipped to correspond to proper grazing. Original photo number 180817.
