OHIO. 167 



and weed seeds; the control of weeds by spraying; the study of the 

 diseases of farm crops; analytical work required in the various lines 

 of work elsewhere enumerated, and the pursuit of special studies on 

 the composition of soils and the eftect of variations in such com- 

 position upon that of the produce of the soil; sjoecial studies on the 

 catalpa midge, the raspberry Byturus, and the codling worm, to- 

 gether with general studies on numerous other insect pests; propa- 

 gation of forest trees and the continuance of a forest survey of the 

 State; further comparisons between the mulch and clover crop sys- 

 tems of orchard culture; demonstration work in orchard manage- 

 ment, conducted in various sections of the State, and the beginning 

 of an orchard survey of the State; and the continuance of the 

 station's work on the maintenance of soil fertility. 



The above work is supplemented by a department of cooperative 

 experiments, which conducted dairy, variety, and cultural tests cover- 

 ing fourteen lines of work, in cooperation with more than 2,000 

 persons, located in 59 of the 88 counties of the State. The State 

 is now divided into four districts, with a field assistant in each 

 district, who visits as many of these cooperators as possible each year. 

 This department is also conducting investigations in farm manage- 

 ment, in cooperation with the Bureau of Plant Industry of this De- 

 partment, and the station department of agronomy is cooperating 

 with the same bureau in the study of varieties of barley, oats, 

 timothy, and soy beans. The department of forestry is conducting 

 work in forest tree planting in cooperation with several hundred 

 farmers, and also with several public institutions. The depart- 

 ments of horticulture, entomology, and botany are united in a series 

 of tests, conducted in cooperation with the owners of orchards in 

 different sections of the State, the object of which is to demonstrate 

 the possibility of profitable apple culture in the State. The depart- 

 ment of entomology has investigated the apple-root louse in coopera- 

 tion with the division of orchard and nursery inspection of the state 

 department of agriculture. 



The following publications of the station were received during 

 the past year: Bulletins 184, The maintenance of fertility — statistics 

 of production in field experiments with fertilizers and manures from 

 1894 to 190G, inclusive; 185, Meteoroh)gical summaiT — Press bulle- 

 tins — Index; 193, Silage for fattening cattle; 191, The more im- 

 portant insects affecting Ohio shade trees; 195, Feeding work horses; 

 196, Meteorological sunnnary — Press bulletins — Index; 197, The 

 catalpa midge {Cecidomyia catalpte) ; 198, Spring practice in eco- 

 nomic zoology; 199, Calendar for the treatment of plant diseases 

 and insect pests; 200, Second annual report on forest conditions in 

 Ohio; 201, The mineral elements in animal nutrition; and 202, The 

 raspberry Byturus {Byturus unicolor) ; Circulars 77, Cooperative 



