Field No.
The "Field No." is a part of a tract that is separated by permanent
boundaries, such as: (1) fences, (2) permanent waterways, (3) woodlands,
(4) croplines not subject to change because of farming practices, and
(5) other similar features. It is saved as part of the WEPS Run
and appears on the summary and other output reports. This information
is not required for a simulation run but may be useful in identifying
specific WEPS Runs and output.