16 FOREST BELTS OF WESTERN KANSAS AND NEBRASKA. 
tion. Ten of the 20 cones were infested with insect larve, and in one 
cone 6 of these were found and every seed had been destroyed. 
Tree No. 7—Dhiameter breasthigh, 33 inches: height, 67 feet. 
This tree was cut and was found to be over 300 years old. It was 
heavily loaded with green cones, which were much smaller than those 
of No. 6, and, as a rule, contained only 1 seed to each seale. Twenty 
cones yielded 569 seed, of which 120, or 21 per cent, were sound. No 
indication of damage by insects was discovered, but a considerable 
number of the seeds were aborted. 
Tree No. S8—Diameter breasthigh, 10 inches; height, 38 feet. 
This was a small, thrifty tree in a small group. The opportunity 
for fertilization of the seed was therefore better than in the case of 
the others examined. The tree bore 14 green cones, 10 of which 
were examined and found to contain 377 seeds, of which only 3 were 
sound. The poor seeds were undeveloped; no evidence of insect 
damage appeared. Conditions for seeding under this tree were fair, 
but no seedlings were growing. 
The following table presents the numerical results of the preceding 
individual studies: 
TABLE I.—Number and percentage of good seeds taken from cones of individual 
trees. 
FRESH CONES FOUND BENEATH THE TREE. 
Diam- | Per 
— eter : Seed-bed| «... | anna. | Good |* or cont 
Tree No. breast. | Heisht. | "area. Cones. | Seeds. | gaaqs. | Of ecod 
high. eee 
Inches. Feet. Sq. feet. 
eee a a ey 22 300 351 D1 ee 
210 Bes a ee ee Sees ee 11.0 25 440) 173 66) | Soc 2 See | eee ee 
3 Se Ce Oe ee 30.0 65 1,800 165 685 15 2 
18.0 HO) 
4 | 3.500 240 548 5 1 
7 19.0 > | 
GREEN CONES PICKED FROM THE TREE. 
> Diameter ~ Per cent 
Tree No. breast- Height. Cones. Seeds. Boo of good 
high. a a seeds. 
Tniches. Feet. 
ae ee nace 13.5 25 20 1,307 191 | 14.6 
aoe ee ee a ee 33.0 67 20 569 120 | 21.0 
s 10.0 38 10 377 3 | Re: 
It appears. then, that out of a total of 1,509 seed gathered from fallen 
cones, only 20, or 1 in 75, were good, and that out of 2,253 seed from 
ereen cones 314, or not quite 1 in 7, were good. While in some cases 
insect injury was responsible for a large part of the defective seed, 
