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DEPARTMENT BULLETIN NO. 829.-THE MOSAIC DISEASE OF Sugar Cane and
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Control...
Elimination by roguing..
Exclusion..
Eradication.
Elimination by grinding all cane and securing clean seed..
Elimination by planting immune varieties..
DEPARTMENT BULLETIN No. 830.-EFFECTt of Temperature on the Resist-
ANCE TO WOUNDING OF CERTAIN SMALL FRUITS AND CHERRIES:
Experimental work..
Description of the method employed..
Conditions of the tests......
Discussion of results....
DEPARTMENT BULLETIN No. 831.-SPILLWAYS FOR RESERVOIRS AND CANALS:
DEPARTMENT BULLETIN No. 832.-THE FLOW OF WATER IN DREDGED DRAIN-
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DEPARTMENT BULLETIN No. 834.-BLACK-GRAIN-STEM SAWFLY OF EUROPE IN
THE UNITED STATES:
DEPARTMENT BULLETIN No. 835.—Capillary Movement of SOIL MOISTURE:
Object....
Plan of experiments..
Rate and extent of movement of soil moisture by capillarity..
Effect of gravity on the movement of soil moisture by capillarity..
Evaluation of empirical curves..
Open versus covered flumes..
Effect of temperature on soil-moisture conditions.
The capillary siphon......
Capillary movement of moisture from a wet to a dry soil.
References...
DEPARTMENT BULLETIN No. 836.-BROOM-CORN Experiments at WOODWARD,
OKLA.:
DEPARTMENT Bulletin No. 837.-Control of the Grape-berry Moth in
Seasonal history...
Relation between seasonal-history data and control measures..
Natural control of first-brood larvæ...
Control experiments...
Conclusions....
Recommendations..
DEPARTMENT BULLETIN No. 838.-CYPRESS BARK SCALE:
Economic importance.....
History....
Native host plant..
Distribution and spread.