1904. J 



Experiments with Barley. 



213 



series, viz., the artificial manures most suitable for barley 

 following on wheat, a rotation which is fairly general on medium 

 and light loam soils in Yorkshire. The manures employed and 

 the yields obtained in these tests, which were carried out in 

 1901 on two-acre plots, were as follows : — 



Plot. 



Manure. 



Total Yield. 



': 



Increase Over 

 Unmanured Plot. 







Bushe's. 



Bushels. 



I 



None. 



49i 





2 



1 cwt. sulp. ammonia 





3 





1 „ sulp. ammonia I 



55i 





3 t 



2 superphosphate/ 

 1 sulp. ammonia ] 





< { 



2 superphosphate I 

 2 „ kainit J 



561 







2-j „ Damaraland guano 

 144^ lb. nitrate of soda | 



54 



41 



1 { 



2 cwt. superphosphate I 

 2 kainit J 



59* 





It will be seen that the " complete " mixtures applied to 

 Plots 4 and 6 produced the greatest yields ; this side of the 

 .experiment was referred to in this Journal, Vol. IX., p. 71, but 

 subsequent investigations have been directed to the effect of 

 manuring on malting qualities. The grain from each plot was 

 malted, and a chemical examination was also made of the 

 grain, with the results shown in the following table : — 



Plot. 



Grain. 



Malt. 



Percentage of 

 Nitrogen. 



- 



Percentage 

 of Potash 

 in the Ash. 



Extract per 

 336 lb. of 

 Dry Malt. 



Diastatic 

 Capacity. 









lb. 





6 



1-197 



36-56 



96-0 



30'5 



1 



i"33 



33-32 



95*5 



23*5 



4 



i-37 



36-29 



95*5 



28-0 



5 



1-404 



33-65 



947 



25'5 



2 



1-42 



30-87 



94-o 



25*5 



3 



' "44 



28-301 



94-o 



24-0 



In view of the recognised relationships between the proportion 

 of nitrogenous constituents in barley and its malting properties, 

 the plots in the above table have been arranged according to 

 the increasing proportion of nitrogen found in the samples. It 



