Seedlings with any of the essential structures missing or so badly and irreparably damaged that balanced development cannot be expected.
2.
Damping off
A disease of plants, especially seedlings, encouraged by cold, wet soil and crowded conditions.
3.
Damping-off
A condition in which young seedlings are attached (parasitized) and killed by soil-borne fungi immediately following germination. This condition is sometimes mistaken for poor seed quality.
4.
Data dictionary
A description of features and objects useful to store field survey data quickly in a GPS datalogger
5.
Datalogger
A handheld lightweight data entry computer, also used in GPS applications.
6.
Datum
A math model which depicts a part of the surface of the earth. Latitude and longitude lines on a paper map are referenced to a specific map datum. The map datum selected on a GPS receiver needs to match the datum listed on the corresponding paper map in order for position readings to match.
7.
Day-neutral plants
Plants which have no daylength requirements for floral initiation.
8.
dBA
Decibel scale that has been adjusted for sensitivity of the human ear.
9.
DCG®
See 'Depth controlled gain'.
10.
Dead matter
Type or cuts no longer needed for printing; it is put into the hellbox for melting down and reuse. The opposite of live matter. (See 'Live-matter page'.)
