Fig. 6. Carbon stock in soil at a depth of 0 to 6 cm, in surface residue, and in soil plus residue as affected by harvest strategy (averaged across fertilization strategies) during the first 5 yr of management. Vertical bars are LSD at P = 0.1 to separate means among harvest strategies within a year. Carbon sequestration values are based on linear regression for each of the system components (i.e., soil, residue, and soil + residue). Different letters following C sequestration rates within a soil–residue component indicate significance at P 0.1