Germination. 25 
MINIMUM. OPTIMUM. MAXIMUM. 
Bean (Scarlet runner)...... 40> Fos UL eee Poe 2 3 ge Fs Bag Se 
I ae ra ogee Caanacaesnavasesease Zip 3 Aten eS CE Oe, axe 88 -99 
OR Se ee ee = 1 aaah SS ae ean ED 
BEI VES PEGE pros. ccktoeekeenxe se exe So-99 . 8a SS SPP Ey 111 -122 
EPPOONATIIEE ins Rice caedcdutsi~seee Beer Sk 88 -99 _...... 111 -122 
SESS ES Sn A SO f See ers Cif Gin =! Soe ee 88 -99 
BMEIEY oon 2 gh 55s concen aeasaskaseu ave 5) Salar eee et! ies SS) 2) eae oes 111 -122 
Reet COP, 5250 i225 ckn cps scene te, § Deere rs! eon oo OF baa 111 -122 
ieucerne ( Alfalfa ).:..<......20: 88-99 aces. Sy LEP «ew: 111 -122 
1ST ae ge ae ae 60-65 ...... 88 -99 _...... 111 -122 
2 Ss OE SRS eee Set ee ee =. IS renee i Se: ee ee 88 -99 
2 So eh SOR a eee eee ena Sh eee G6 2S eee 88 -99 
cs) 6, ee eae wl 60" "2.5. me id be b Mader! 111 -122 
Moe cee aoa as avabiganseWa os A ee 77 -88 _...... 88 -99 
BEMEITONGGE oy 5.00 sesanc.séctsxesacs AA —BVS, fo. Sa —-99) 2. 22: 99 -111 
gOS Bae eee ee Oe ee ae a ee es PAB oe. 88 -108 
These temperatures refer to the soil or other medium 
with which the seeds are in contact, and not to the atmos- 
phere. 
When moisture is sufficient, the time from planting to 
sprouting decreases rapidly as we approach the optimum 
temperature. In an experiment, Indian corn sprouted in 
one-third of the time at 88° F. that it required to sprout 
at 61°. 
31. Free Oxygen is Essential to Germination. If 
we place in the bottom of each of two saucers* a layer of 
puddledt clay or loam, put 25 beans capable of germination 
on the soil in each saucer, then fill one saucer with moist 
sand, and the other with puddled clay or loam, pressing the 
*If flower-pot saucers are used they should first be well soaked in water, so 
that they will not extract water from the soil. 
{ Soil is said to be pudd/ed when wet and packed until it isin the consistency 
of putty. 
2 
