86 CYANAMID — MANUFACTURE^ CHI^MISTRY AND USi:S 



pounds of sugar when lime-nitrogen was used.^ J. Kloppep 

 obtained yields of sugar beets with no fertilizer, sodium nitrate 

 and lime-nitrogen respectively of loo, 127, and 149, while the 

 yields of sugar were icx), 99, and 130. As an average of 10 

 cereal and root crops in 29 field experiments, Steglich^ assigned 

 the following values to the various materials : no fertilizer, 81 ; 

 sodium nitrate, 100; ammonium sulphate, 95; and lime-nitro- 

 gen, 96. Schneidewind,* as an average of 5 cereal and root 

 crops reports that the increase in yield over the fields un- 

 fertilized with nitrogen were comparatively, sodium nitrate, 

 100; ammonium sulphate, 88; and lime-nitrogen, 73. Wagner, 

 Director of the Experiment Station at Darmstadt,^ as a sum- 

 mary of II field tests on cereals with 27 pounds or less of 

 nitrogen per acre, reports the increased yield over the fields 

 without nitrogenous fertilizer, comparatively as follows: 

 Sodium nitrate, 100; ammonium sulphate, 87; and lime-nitro- 

 gen, 94. Miintz and Nottin, as an average of 11 field tests 

 with wheat report the following comparative yields obtained: 

 Cyanamid, 100 ; ammonium sulphate, 94 ; dried blood, 96.^ 



USE AS A WEED DESTROYER. 



In Germany, lime-nitrogen is used to a considerable extent 

 for the destruction of obnoxious weeds, such as wild mustard, 

 occurring in grain crops, particularly oats. The fine, dry, lime- 

 nitrogen is scattered either by hand or by machine early in the 

 morning when the leaves are wet with dew, or after a rain, at 

 the rate of 60 to 90 pounds per acre. The lime-nitrogen readily 

 clings to the rough, hairy, almost horizontal leaves of the wild 

 mustard, and forms a concentrated solution in the moisture on 

 the leaves. This tends to dilute itself by osmosis and brings 



^ Oesterr-Ungar. , Zeit. fur Zuckerindustrie und Landwirtschaft, 

 XXXV, No. VI, 1906, 676. 



2 Fuhling's Landw. Zeit., 56, No. 15, 1907, p. 539. 



' Fuhling's Landw. Zeit., 56, No. 22, 1907, p. 780. 



* Arbeit. Deut. Landw. Ges., No. 146, 1908, p, 116. 



5 Arbeit. Deut. Landw. Ges., No. 129, 1907. 



^ Annales de I'Institut National Agronomique, 2nd Series, Vol. VI, 

 No. I. See also pp. 45-47- 



