Image #DCK-2: Quadrat (0.5 x 0.5 m) after clipping and removal of litter; grazed treatment, Dickinson grassland site, North Dakota, USA. Five root cores have been taken within the quadrat to 1.0 m depth, in increments as follows: 0-5 cm, 5-10 cm, 10-20 cm, 20-30 cm....90-100 cm. Note the paper bags (upper left) in which core samples are placed, and white strings (top and bottom of picture) used as aids in locating quadrats. All holes left by root sampling were later filled. (Photograph taken August 1970).