88 



EXPERIMENTS UPON BARLEY 



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

 since 1852, 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 latter months of growth (June and July) are the 

 driest. 



II. — Barley Grown in Rotation, 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, but that the decline must on the whole be set down to 

 unfavourable seasons. 



For selected plots on the rotation field. Table XXXYII. 

 gives the production of grain and straw and certain particulars 

 as to quality, taking an average of the last five courses only. 

 The first plot has been wholly unmanured, and all the crops 

 in the rotation are removed from the land ; the average produc- 

 tion is, however, higher than on the unmanured plots growing 

 barley continuously, because of the fallowing the land receives. 

 When minerals only are applied to the root-crop on Plot 2 

 (roots are grown immediately before the barley), there results a 



