function to run RothC parallel for a series of fields
Arguments
- this.xs
(numeric) selected id for a single field
- dt.c
(data.table) set will all fields
- scen
(character) scenarios to be simulated. Options include BAU, BAUIMPR, CLT and ALL.
- simyears
(integer) value for the amount of years to simulate, default is 50 years
- p
(progress bar) progress bar
- final
(boolean) option to select only the last year