52 



MISSOURI AGR. EXP. STA. RESEARCH BULLETIN 49 



TABLE 26. RELATION OF PLOT VARIABILITY TO SIZE OF EXPERIMENT FIELD. 

 Check Plots in Wheat Variety Test 1921. 



*The four-range and eight-range sections are in order from west to east. 



similar. Again the degree of accuracy obtained with four replications 

 in four ranges would have been unattainable with five replications in 

 16 ranges. 



The oats variety test and strain test in 1921 were contiguous, oc- 

 cupying 24 ranges, with 120 check plots of Kherson oats, or one in 

 every sixth plot. The variability of these check plots in sections of 



TABLE 27. RELATION OF PLOT VARIABILITY TO SIZE OF EXPERIMENT FIELD. 

 Check Plots in Oats Variety and Strain Test, 1921. 



