88 



tion of the barley grain than have variations in the manuring, 

 but that the best barley will be grown with a fair but not large 

 amount of nitrogenous manure combined with a free supply of 

 phosphoric acid in some way or other. 



It does not appear possible to establish any such critical 

 periods for the rainfall in relation to the growth of barley as 

 could be done for wheat. 



The Table (XXXVI.) shows fifty-three barley crops from 

 1852 to 1901, taking the average of the completely manured 

 plots divided into five groups according to their yield of grain, 



TABLE XXXVI. 



together with the mean rainfall for each of the five months 

 during which growth is proceeding. No very definite relation- 

 ship is observable, though a general tendency will be seen 

 to get the heaviest average yield when the earlier months of 

 growth (March to May) are dry, also the lightest average yield 

 when the later months of growth (June and July) are the 

 driest. 



II. BARLEY GROWN IN EOTATION, AGDELL FIELD. 



It has already been stated that the production of barley in 

 the rotation field shows much the same decline on the manured 

 plots as it does on the completely manured plots in the Hoos 

 field, and the fall has continued instead of being reversed as 

 in the case of the continuous barley plots. 



For selected plots on the rotation field, Table XXXVII. 

 gives the production of grain and straw and certain particulars 



