Minirhizotron Root Data for Hog Island, VA 1992-1998

Minirhizotron data from fertilization experiment. On 36-year old dune ridge on Hog Island from 1992 to 1998. These tubes were sampled twice a year with the fall data from 1992 included. In most cases 26 frames were sampled randomly within specific depth intervals and digitized for each tube. Plot 1 was discontinued after 10/93 and Plot 2 was discontinued after 4/93. In this data set if there were no roots in a frame then no ROOT ID appears and length and width are 0. fertilization treatment = In 1992, three applications of 15 gN / m2 (March, June, October). After 1992, 15 gN / m2 applied once per year (mid-summer) through 1998.