IV 
Journal of Agricultural Research 
voi. xxxr 
Page 
An Improved Method of Computation of Net-Energy Values of Feeding 
Stuffs. Max Kriss_ 469 
Identity of the Mealybug Described as Dactylopius calceolariae Maskell. 
Harold Morrison (6 text figures)_i_ 485 
Plate Counts of Soil Microorganisms. N. R. Smith and S. Worden (3 
text figures)_ 501 
Cladosporium Leaf Mold of Tomato: Fruit Invasion and Seed Trans¬ 
mission. Max W. Gardner (5 plates; 1 text figure)_ 519 
Fluctuation in the Distribution of the Colorado Potato Beetle. C. H. 
Batchelder (1 text figure)_ 541 
The Ammonia Content of Soil and Its Relation to Total Nitrogen, Ni¬ 
trates, and Soil Reaction. Horace J. Harper_ 549 
Localization of the Response in Plants to Relative Length of Day and 
Night. W. W. Garner and H. A. Allard (4 plates)_ 555 
Behavior of Phytophaga destructor Say Under Conditions Imposed by 
Emergence Cages. Walter H. Larrimer (2 text figures)_ 567 
The Reaction of Certain Grasses to Chinch-Bug Attack. Wm. P. Hayes v 
and C. O. Johnston_ 575 ** 
Difference in Internode Lengths Between, and Effect of Variations in 
Light Duration Upon, Seedlings of Annual and Biennial White Sweet 
Clover. A. J. Pieters (6 plates)_ 585 
Sclerotinia Species Causing Decay of Vegetables Under Transit and 
Market Conditions. G. B. Ramsey (7 plates; 3 text figures)_ 597 
Age of Seedlings as a Factor in the Resistance of Maize to Sodium Chlo¬ 
ride. G. J. Harrison and C. J. King (1 text figure)_ 633 
Organization of the Telial Boms in the Pine Rust, Gallowaya pinicola 
Arth. B. O. Dodge (2 plates; 1 text figure)_ 641 
Sulphate Content of the Leaf-Tissue Fluids of Egyptian and Upland 
Cotton. J. Arthur Harris, Clara T. Hoffman, and Walter F. 
Hoffman_ 653 
Abortion-Bacterin Treatment of Cows Having Udders Infected by Bac¬ 
terium abortus . J. M. Buck and G. T. Creech_ 663 
Shape and Weight of Eggs in Relation to Their Hatching Quality. M. A. 
Jull and S. Haynes_ 685 
Relation Between the Bacterial Count of Whole Milk and That of the 
Cream and Skim Milk Separated From It. C. S. Leete_ 695 
Leaf spot of Maize Caused by Ophiobolus heterostrophus , n. sp., the Ascig- 
erous Stage of a Helminthosporium Exhibiting Bipolar Germination. 
Charles Drechsler (2 plates; 5 text figures)__ 701 v 
The Translocation of the Food Materials of the Wheat Seedling. 
L. Edwin Yocum (4 text figures)_ 727 
Possibilities and Limitations of Chloropicrin as a Fumigant for Cereal 
Products. R. N. Chapman and A. H. Johnson (5 text figures)_ 745 
Observations on the Hibernation of Ground Squirrels. William T. 
Shaw (6 text figures)_ 761 
The Value of Calcium Phosphate as a Supplement to the Ration of Dairy 
Cows. J. B. Lindsey and J. G. Archibald (4 plates; 1 text figure)_ 771 
The Water-Soluble Vitamin Content of the Velvet Bean. W. D. Salmon 
and Emerson R. Miller (10 text figures)_ 793 
Studies on the Ophiobolus graminis Sacc. and the Take-All Disease of 
Wheat. Ray J. Davis (6 plates; 5 text figures)_ 801 ^ 
Influence of Soil Temperature and Moisture on Infection of Young 
Wheat Plants by Ophiobolus graminis. H. H. McKinney and R. J. / 
Davis (1 plate; 7 text figures)_ 827 v 
Bacterial Spot of Cowpea and Lima Bean. Max W. Gardner and 
James B. Kendrick (6 plates)___ 841 
The Influence of Certain Environmental and Cultural Conditions on 
Fruit-Bud Formation of Pear and Apricot. C. B. Wiggans (6 plates; 
3 text figures)_ 865 
Benzene as a Larvicide for Screw Worms. D. C. Parman- 885 
Method of Stimulating Germination of Western White-Pine Seed. J. A. 
Larsen (2 text figures)_ 889 
Longevity of the Teliospores and Accompanying Uredospores of Cronar - 
tium ribicola Fischer in 1923. Perley Spaulding and Annie Rath- 
bun-Gravatt (1 text figure)_____ 901 
The Critical Temperature for Infection of the Potato Seed Piece by 
Fusarium oxysporum. H. G. MacMillan and G. A. Meckstroth- 917 
