EXPERIMENTS IN FIELD PLOT TECH NIC 77 



13. In the oats strain test in which both Kherson and Red Rust- 

 proof check plots were included, the Kherson check was more effect- 

 ive than the Red Rustproof check as a basis for adjusting the yields of 

 the Kherson strains, while the Red Rustproof check was more ef- 

 fective as a basis for adjusting the yields of the Red Rustproof strains. 



14. The correlation between the yields of adjacent Kherson and 

 Red Rustproof check plots was not statistically significant. Adjust- 

 ment of the yields of the Kherson check plots on the basis of the 

 yields of the adjacent Red Rustproof plots, and of those of the 

 Red Rustproof plots on the basis of the Kherson yields increased va- 

 riability. 



ACKNOWLEDGMENT 



The writer is indebted to Professors M. F. Miller and W. C. 

 Etheridge for a critical reading of the manuscript, and to O. W. 

 Letson for preparing figure 8. 



