July i, 1920 



Universality of Field Heterogeneity 



287 



into thirds, and of 0.0425 acre when the division has been into quarters 

 of plots. 



In the spring of 1912 the whole field was uniformly seeded to alfalfa; 

 only one crop was harvested, and yields were recorded for the entire 



FIG. 3. Diagram showing yield of alfalfa in second cutting, 1913. on the Huntley experimental tract 

 The yield is expressed in pounds per quarter plot. 



plots only. In 1913 and 1914 three cuttings were made. The first 

 cutting was harvested in half plots. The second cutting of 1913 and the 

 first and second cuttings of 1914 were harvested in quarter plots. The 



