1906.] 



EXPERIMEJSTS WITH LiME 



Nitrogen. 



41 



It will be seen that the lime nitrogen gave a substantial 

 increase in the crop, notwithstanding seed being put in im- 

 mediately after the manure, though the results were not equal 

 to those from nitrate of soda. 



In the potato experiments lime nitrogen was applied on 25th 

 April at the rate of 109 lb. per acre, while nitrate of soda at the 

 rate of 127 lb. per acre was put on as a top-dressing, half on 

 5th May and half on the loth June. The potatoes were planted 

 on 30th April. No special difference in the growth on the plots 

 was apparent to the eye and no disease appeared. The results 

 were as follows : — 



Manures 



Yield per acre. 



Per cent. 



Unraanured 

 Nitrate of soda 

 Lime nitrogen 



Cwt. qr. 

 126 0 

 138 I 

 138 3 



100 

 I09'8 



IIO'I 



In this case the lime nitrogen proved equal to nitrate of 

 soda. 



The experiments on heavy loam were carried out with barley, 

 potatoes, and mangels. The manuring was varied on different 

 plots, the lime nitrogen being applied a fortnight before sowing, 

 and also as a top-dressing, as was also the nitrate of soda. 

 Taking the results of the several plots together the yield of 

 barley may be expressed thus : — 





Grain. 



Straw, 



Total crop. 



Unmanured 



86-3 



79-8 



78-4 



Nitrate of soda 



100 



100 



100 



Lime nitrogen ... 



ioo'6 



90-8 



937 



From these figures it would ssem that the lime nitrogen 

 interfered with the yield of straw, although in regard to pro- 

 duction of grain it was equal in its effect to nitrate of soda. 



The experiments with potatoes gave very satisfactory results, 

 the effect of the lime nitrogen being calculated as 93*6 per cent, 

 that of nitrate of soda, and the results with mangels were very 

 similar, working out to 94'6 per cent. 



