215 



they were extended to the wheat crop, and nitrate of calcium was 

 included in the enquiry. 



The comparison was in each case made with sulphate ot am- 

 monia and nitrate of soda, one cwt. per acre (125 kgs. per hectare) 

 of the former being taken as basis, and the relative quantities of the 

 other nitrogenous manures so arranged as to supply the same 

 amount of nitrogen. 



The author gives the tables of results of these experiments. 



The best wheat crop, both in grain and straw, was obtained 

 from nitrate of soda; sulphate of ammonia and calcium nitrate 

 being practically equal in both corn and straw, while calcium cya- 

 namide, though giving slightly more corn than sulphate of ammonia 

 and calcium nitrate, yielded considerably less straw than either. 



JAMES HENDRICK. New Nitrogenous Manures. Trans. HighL 

 and Agric. Soc. Scotland, Vol. XXI, 1909, pp. 122^134. 



Until about 1880 the United Kingdom was the greatest consumer 

 of nitrate of soda ; since then other countries have so rapidly ad- 

 vanced in the consumption of artificial manures that the United 

 Kingdom is now a comparatively small factor in the market. 



Germany comes first. The United States are the next largest 

 consumers and several other countries already are larger consumers 

 than the United Kingdom, so that the consumption of nitrate which 

 has increased from about 200 ooo tons to i 700 ooo in the last 

 thirty years, may continue to increase enormously. 



This constantly increasing demand for nitrogenous manures 

 causes some anxiety for the future, and new sources have been 

 sought for, the new manures, nitrate of lime and cyanamide have 

 meanwhile been discovered. 



In 1908, 25 ooo tons of nitrate of lime were manufactured and 

 it is expected that in a few years the production will increase to 

 100 ooo tons* It should contain about 13% f nitrogen. Three 

 samples analysed by the author contained respectively 12.73, 12.14 

 and I3.o7/ . Whilst commercial nitrate of soda contains about 



15-5 % 



The author made some experiments to determine how rapidly 

 nitrate of lime absorbs moisture in comparison of nitrate of soda. 

 Two bags each containing an equal weight of these manures were 

 left in an unheated store during the winter. After 5 weeks the 

 nitrate of lime had become hard and lumpy and after nine weeks 



