There is a slight problem here, in the lack of specification of types of field book. One can use the following terms: "Jotter" is the day-to-day field book which may or may not be married with the "note log", which is the much more sophisticated note organizer. There is the "to-do" log which includes a log of what was actually done; and finally there is the "filed journal", a private diary which any field researcher needs to keep hold of sanity.
These approaches and different notebooks ought to be mentioned here, since scientists and academicians utilize some combination of them all. I keep a total of five field books for one research project, beginning to end.