ON THE YIELD OF HAY 



91 



and Latchingdon the respective rainfall stations are within from two 

 to four miles of the experimental centres. 



The curve representing the correlation of the hay yield with the 

 rainfall at Saffron Walden is a very steep one, and shows quite 

 distinctly that rainfall is the most important factor. 



At Tysea Hill and Martin's Hearne even a high rainfall from the 

 1st of May till harvest of 9-34 inches and 11-51 inches respectively 



50 



40 



30 



20 



10 



1 



_L 



2 4 6 8 10 12 



Inches of Rainfall. May 1 till Harvest 



FIG. 24. Influence of Rainfall on the Yield of Hay on the Untreated Plots at 

 Wendens , Butterfields , and Cockle Park . 



produce crops of only 38-3 cwts. and 23-4 cwts. The manurial factor 

 is clearly of greater importance at these two centres and particularly 

 at Martin's Hearne. The curves are not nearly so steep as at Saffron 

 Walden, and there is a much greater response to manuring. 



At Latchingdon the rainfall has more influence on the crop than 

 at Martin's Hearne or Tysea Hill and less than at Saffron Walden. 

 It was difficult to get any correlation between the rainfall and the 



