Sequence of study sites for data analysis of main data files: Alfalfa: Alf 1 Alf 2 (through Sept 83) Alf 3 (begin Oct 83) Alf 4 Alf 5 Bluegrass: BG 06 BG 07 BG 11 Tallgrass TG 12 TG 15 TG 13 TG 16