1895.] Deviation in Development Due to the use of Unripe Seeds. 911 
TX.—WHEAT ON Poor anp Ricau Sort. 
Experiment conducted by Latta. 
Plat unfertilized produced 1 Ib. of straw to .56 lbs. of grain. 
bone black, 
Plat with < ammonia, | producea 1 lb. of straw to .45 lbs. of grain. 
potash, 
potash, 
Plat unfertilized produced 1 lb. of straw to .55 Ibs. of grain. 
Plat with horse manure produced 1 lb. of straw to .49 lbs. of grain. 
Plat with horse manure produced 1 Jb. of straw to .51 lbs of grain. 
bone black, 
Plat with ammonia, } produced 1 lb. of straw to .47 Ibs. of grain. 
Plat unfertilized produced 1 Ib. of straw to .52 lbs. of grain. 
Plats unfertilized averaged 1 lb. of straw to .55 Ibs. of grain. 
Plats fertilized averaged 1 lb. of straw to .48 lbs. of grain.” 
tion, especially in the form of sudden scarcity, will favor sex- 
ual reproduction.” I think I may safely enlarge this state- 
ment, and say that any cause which retards uniform progress in 
the development of an animal or plant favors reproduction. By this 
is meant that after such a check occurs the organism will de- 
velop the reproductive parts of its structure faster and more 
fully than the other parts, and in the case of crops the yield of 
seed will be greater proportionately, than of the leaves and 
stems.“ 
Enough has doubtless been said to show that the deviations 
in development, which arise when unripe seeds are used, drop 
into a general category of changes dependent upon the avail- 
able energy of the plant and the uniformity of its development. 
In general, the change is a tendency toward reproduction at 
the expense of the vegetative parts of the plant. 
Purdue University, Lafayette, Ind. 
BIBLIOGRAPHY. 
The following are the chief works treating of the subject of 
the growth of unripe seed. Additional citations have already 
“I haye developed this proposition more fully, and shown its application in 
another direction, in an article entitled: “A new factor in the improvement of 
crops.’’ Agric. Sci., vii (1893), pp. 340-345. 
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