X 
Journal of Agricultural Research 
Vol. XI 
TEXT FIGURES 
Natural Reproduction from Seed Stored in the Forest Floor 
Page 
Fig. i. Migration chart: Graphic representation of the number of seedlings per 
acre in each chain distance from seed trees. Kaniksu National 
Forest.. i 
2. Plan of survey on Columbia bum.. 4 
3. Curve showing the germination of white-pine seed in the Columbia 
bum 11 years after the fire... 9 
4. Ground plan of the spot shown in Plate 2, A... 11 
A New Parasitic Nema Found Infesting Cotton and Potatoes 
Fig. 1. Tylenchus penetrans: Adult female. 28 
2. Potato pustules caused by the nema Tylenchus penetrans . 29 
3. Tylenchus penetrans: Profile of the tail end and bursa of the male. 32 
4. Tylenchus penetrans: Ventral view of the tail end of the male. 32 
5. Diagram showing measurements of a nema and the corresponding for¬ 
mula. 33 
Endrot of Cranberries 
Fig. i. Fusicoccutn putrefaciens: a, Vertical section of a simple pycnidium 
grown in pure culture on sterile sweet clever stems (Melilotus alba); 
b, vertical section of a chambered pycnidium from a com-meal-agar 
culture; c, part of a section of a showing sporophores and spores; d, 
separate sporophores and spores from pure culture.. 37 
2. Fusicoccutn putrefaciens: a, Median vertical section of a pycnidium 
growing in the angle beneath the old calyx lobe of an old rotten 
cranberry; b t similar section of a two-chambered pycnidium, with 
part of the apical portion gone; c, portion of inner wall of a pycni¬ 
dium, showing simple and branched sporophores with immature 
spores; d , separate pseudoseptate spores. 37 
3. Fusicoccutn putrefaciens: a , Vertical section of a young pycnidium em¬ 
bedded in the tissue of a recently rotted cranberry; b, vertical sec¬ 
tion of a nearly mature pycnidium showing two chambers; c, sepa¬ 
rate branched and simple sporophores with immature spores; d, sep¬ 
arate spores, showing variations in form and size... 38 
A Statistical Study of Some Indirect Effects of Certain Selections 
in Breeding Indian Corn 
Fig. 1. Graphs showing the mean length of the ears in the four Illinois strains 
of Indian com for 11 crops, 1905-1915. 114 
2. Graphs showing the mean circumference of the ears in the four Illinois 
strains of Indian com for 11 crops, 1905-1915. 116 
3. Graphs showing the mean weight of the ears in the four Illinois strains 
of Indian com for n crops, 1905-1915.. 117 
4. Graphs showing the mean number of rows of kernels in the four Illinois 
strains of Indian Com for 11 crops, 1905-1915... 117 
5. Graphs showing the standard deviation of the length of the ears in the 
four Illinois strains of Indian com for 11 crops, 1905-1915.. 119 
6. Graphs showing the standard deviation of the circumference of the 
ears in the four Illinois strains of Indian com for 11 crops, 1905-1915 . 119 
7. Graphs showing the standard deviation of the weight of the ears in the 
four Illinois strains of Indian com for 11 crops, 1905-1915. 120 
