CHE REFERENCE LIBRARY - Pole Shift Survival Information

PROPAGATION BY MEANS OF' SEEDS AND SPORES 19
usually 3-h& stuK This shed screen is oftenest used for the
protection of tender plants, but it affords an exceedingly useful
and convenient place for
the storage of pots and boxes
of slow-germinating seeds. A ] t
more elaborate shed screen, i
made of lath or slats, and con- i
taking seed-beds edged with FIG. 10. Shed screen for seeds and
boards, is shown in Fig. 11.
plsnt,s.
Various frames and covers are employed for indoor seedage,
designed to regulate atmospheric moisture and to control
temperature. They are more commonly employed in the
growing of cuttings, and are therefore described in Chapter Y.
Yariations in temperature exercise less influence on seeds
than variations in moisture. Yet. it. is important that the extremes
of temperature be not great, especially in small, delicate
FIG. II,
Lnrge shed screen, with seed-beds.
or weak seeds. Stwls will e~iduw greater extremes of tempcrature
when dry thau when moist. This indicates that
germinatin g seeds must. 1~ kept in a relatively uniform temperature.
For this reason it. is poor practice to put seed-boxes
in a wimlow in full sunlight. Partial or complete shade serveF