SEASON AND THE HAY CROP 



185 



the rainfall and temperature. Thus the year 1902 with fre- 

 quent light rains was especially favourable to the growth of 

 the shallow-rooted Lathyrus, and other leguminous plants, the 

 proportion of which was doubled or more on some of the plots. 

 The Table LXIII. shows the monthly rainfalls for the seasons 



TABLE LXIII. Rothamsted Park Hay. Seasons of highest and lowest 

 Yields compared with Monthly Rainfall. 



giving the highest and the lowest yields on the completely 

 manured Plot 9, also the corresponding yields on Plot 14, 

 which receives an equivalent amount of nitrate of soda 

 instead of the ammonium-salts on Plot 9. Although in a 

 general way it can be seen that a wet late spring is on the 



