PRACTICAL REMARKS 73 



6. Practical Remarks. It is most usual to grow barley 

 after roots. If these have been fed off on the land with cake 

 it will generally be unadvisable to apply any nitrogenous manure 

 to the following barley. If, on the other hand, the roots have 

 been carted from the field and consumed elsewhere, the barley 

 will probably be much benefited by the application of sulphate 

 of ammonia and superphosphate. If the roots have received a 

 good dressing of farmyard manure, i cwt. per acre of 

 sulphate of ammonia will probably be quite sufficient to raise 

 the produce of barley to a full crop. If the turnips have been 

 grown with superphosphate only, and then removed from the 

 land, 2 cwts. of sulphate of ammonia, with 2 cwts. of super- 

 phosphate, and perhaps 2 cwts. of kainite, would be a suitable 

 manuring. 



When barley is grown for malting purposes it is not un- 

 frequently taken after wheat, artificial manuring is then the 

 most appropriate treatment. In this case about i cwt. of 

 sulphate of ammonia would usually be a maximum dressing, 

 and superphosphate and kainite would be added to ensure the 

 best quality of grain which the character of the season would 

 allow. An even distribution of the manure is of great im- 

 portance if an even ripening of the crop is to be attained. 

 This even distribution may be accomplished by thoroughly 

 mixing the ammonia salt with a considerable bulk of dry soil 

 in fine powder, and applying broad-cast in two operations, one 

 broad-cast sowing crossing the other. If, however, the 

 sulphate of ammonia is applied to the land before drilling the 

 barley, which seems the best plan, the ammonia salt may be 

 well mixed with the superphosphate and kainite, and the 

 whole applied together. A late application of ammonia is very 

 undesirable if a high quality of barley grain is wished for. 



The returns obtained from the application of ammonia 

 salts in the various experiments we have quoted show a 

 greater amount of agreement than was observed in the case of 

 wheat. At Rothamsted the return, with an adequate supply 

 of ash constituents, is about 9-10 bushels for i cwt. of sulphate 

 of ammonia during the first ten years of the experiments, and 

 this grows to 1 1 bushels if we take the average of the whole 



