60 THE UNIVERSITY OF OKLAHOMA 



SUMMARY 



1. A continuous cropping system with the oats crop is not 

 advisable. 



2. Straw may be used in connection with continuous cropping 

 with profit. 



3. The use of manure is profitable whether used in connection 

 with continuous cropping or a rotation. 



4. A'lanure has produced greater yields than crop residues 

 whether used with continuous cropping or a rotation. 



5. A crop rotation has been more effective in maintaining the 

 }ield of oats than has manure when used in the continuous cropping 

 system. 



6. The crop rotation has given as an average for the last five 

 years 7.31 bushels per acre more oats than has the continuous 

 culture. 



7. The best system studied was manure used in connection 

 with a crop rotation. This system gave a yield of 8.7 bushels per 

 acre more oats as an average for five years than did the continuous 

 cropping system. 



8. Considering the approximate 1,5000,000 acres of oats grown 

 per year in the state, and basing the calculations on the figures 

 shown above a rotation would mean over $4,000,000 to the farmers 

 of the state each year over continuous cropping after extra cost of 

 threshing and hauling the increase in yield has been deducted. 

 .\nother $1,000,000 could be added yearly by using manure in con- 

 nection with the rotation. 



XXVII. THE SYKES ALASKAN EXPEDITION OF THE 



UNIVERSITY OF OKLAHOMA OF 192L 



Ed. D, Crabb 



From the Zoological Laboratory of the University of Oklahoma. 

 Contribution No. 22, Second Series. 



Mr. C. E. Sykes, a well known big-game hunter, oil man and 

 parton of science, of Ardmore, Oklahoma, organized a six month's 

 expedition into Alaska and the Yukon Territory of Canada, pri- 

 marily to collect family groups of large mammals for the Museum 

 of the University of Oklahoma. Mr. Sykes. accompanied by the 

 writer, left Norman CHroute to Alaska, April 18, 1921. 



The route taken by the expedition from Seattle to the return 

 to the United States was as follows: C. K. Sykes and the writer, 

 accompanied by R. H. Rockwell, taxidermist for the Brooklyn 

 Museum, and Charles Hoffmeister, a sportsman from Imperial, 

 Nebraska, sailed from Seattle April 23 and arrived at Cordova. 

 April 30. where they were joined by Dr.- W. H. Chase. The party 

 of fi\e embarked on Alav 1 in a 65-foot gas boat, which had been 



