82 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



heretofore been taken by the growers in the available service of the 

 Weather Bureau, but in the spring of 1922, when heavy frost dam- 

 age occurred, urgent request for a frost service was made. Action 

 was taken to grant this request in so far as the funds of the bureau 

 would permit. 



Roswell^ N. Mex. — No effort had been made to protect fruit 

 orchards in this district until the present year when many orchards 

 were heated on a number of occasions on receipt of Weather Bureau 

 advices of probable damaging temperatures. Much interest is now 

 shown in the work of frost protection, and practically all the com- 

 mercial orchards are equipped with frost-fighting devices. 



Yuma, Ariz. — The temperature survey in the Yuma, Ariz., sec- 

 tion that was started a few years ago was enlarged by the estab- 

 lishment of a number of additional stations. This survey is being 

 made primarily in the interests of the citrus-fruit industry, which 

 is assuming considerable proportions in that section. 



Colorado. — Special services were continued in the Gunnison Val- 

 ley and in the vicinity of Grand Junction. About 500 acres of 

 orchards are protected in the latter section, and the possibilities of 

 thorough protection by adequate heating were demonstrated at Fruit- 

 vale, where an orchard was brought through the cold spell unin- 

 jured, notwithstanding the minimum temperature fell to 17° F. 



A^eiv Jersey. — A representative of the Weather Bureau was as- 

 signed to New Lisbon during the frost-danger period of the spring 

 of 1922, where a special frost service is maintained in the interest 

 of the cranberry industry in that section. 



A fruit-frost service was established during the year at Wichita, 

 Kans. Three special stations were established antl frost warnings 

 were distributed to fruit growers over an extended area. In addi- 

 tion, preliminary services were established in Illinois and parts 

 of Florida. 



Cooperation. — Quite extensive cooperation has been had during 

 the year with the Bureau of Markets and Crop Estimates in the 

 Great Plains project, an investigation which that bureau is carry- 

 ing forward in the interest of agriculture in the Great Plains States. 

 Other cooperation with the various bureaus of the department was 

 continued. 



Investigations. — Mathematical Studies of the relation between 

 weather and crops was continued as the routine duties of the divi- 

 sion permitted. Some very close relations were established between 

 the weather and yields of corn and of oats in some important pro- 

 ducing areas, and the importance of the establishment of meteoro- 

 logical stations at agricultural experiment stations becomes more 

 apparent as investigations of this character are continued. Papers 

 published during the year are : 



Hamrick, a. M. " Fruit Frost Work in tlie Grand Valley of Colorado " 

 (Monthly Weather Eeview, October. 1921). 



KiNCEB, J. B. " Relation of Climate to the Geographic Distribution of Crops 

 in the United States" (Ecology, April, 1922). 



Young, F. D., and Ellison, E. S. " Notes on 1922 Low Temperatures in Cali- 

 fornia " (California Citrograph, April, 1022). 



