926 EXPEEIMENT STATION RECORD. 



in the experiments contained to a depth of 9.85 in. an average of 2,939.27 lbs. 

 of nitrogen per acre. Each crop of plants grown withdrew about 44.53 lbs. per 

 acre, or 1.6 per cent of the nitrogen supply. 



Previous investigations by Wagner and others on the comparative fertilizing 

 effect of nitrate of soda, ammonium sulphate, and lime nitrogen are reviewed. 

 As an average of a large number of pot experiments Wagner concluded that the 

 fertilizing efflciency of lime nitrogen was 90 per cent that of nitrate of soda. In 

 the field experiments here reported a somewhat lower efficiency was obtained. 

 For each 100 parts of nitrogen supplied in form of nitrate of soda oats utilized 

 64 parts, winter rye 47 parts, barley' 58 parts, fodder beets 70 parts; supplied in 

 form of ammonium sulphate oats utilized 59 parts, winter rye 38 parts, barley 

 48 parts, fodder beets 59 parts; supplied in form of lime nitrogen oats utilized 

 53 parts, winter rye 41 parts, barley 40 parts, fodder beets 39 parts. The lime 

 nitrogen was found to be particularly beneticial in case of winter crops. 



The best methods of applying the different forms of nitrogenous fertilizers on 

 the crops experimented with are discussed. In general it is recommended that 

 top-dressing Avith nitrogen salts is best done in dry weather after the dew has 

 dried off in the morning. Nitrates should be applied in fine-ground condition. 

 Sulphate of ammonia should not be applied in connection with lime or marl 

 or too soon after the application of these materials to the soil. As a rule am- 

 monium salts should be incorporated with the soil as soon after application as 

 possible. 



Fall application of nitrate of soda, J. B. Castelli {Eiigrais, 22 (1907), 

 No. 45, pp. 1069, 1010). — A number of exi^riments in France and Belgium in 

 which nitrate of soda was applied to wheat in the fall are briefly referred to. 

 They indicate that the practice was beneficial and profitable on a number of 

 different kinds of soil, but more particularly on clay soils. 



Experiments with crude ammonia, E. Voglino (Coltivatore, 53 {1901), 

 No. Ifl, pp. 651-653). — Brief reference is made to experiments with corn in which 

 good results were obtained with this material if applied a sufficient length of 

 time (100 days) in advance of planting the crop. 



The action of ammonium sulphate on light sandy soils, A. Imelmann 

 (Dent. Landio. Presse, 34 (1901), No. 91, pp. 119, 120, fig. 1). — Field experiments 

 on potatoes and rye are reported, which show that ammonium sulphate in con- 

 nection with Thomas slag, superphosphate, steamed bone meal, and kainit, gave 

 good results on light sandy soils poor in humus, contrary to the general opinion 

 that this fertilizing material is not suited to such soils. 



Experiments with lime nitrogen on oats, fodder beets, and potatoes 

 during 1905 and 1906, H. Svoboda (Ztschr. Landiv. Versuchstv. Osterr., 10 

 {1901), No. 9, pp. 104-111; ahs. in Chem. Abs., 2 {1908), No. 6, p. 880).— No 

 benefit was derived from the use of lime nitrogen in these experiments, the 

 returns from lime-nitrogen plats being as a rule less than from no-nitrogen 

 plats. 



Recent experiments with lime nitrogen and other nitrogenous fertilizers 

 {Zcntbl. Ayr. Chem.. 36 {1901), No. 10, pp. 653-661; «&*■. /// Jour. Soc. Clicni. 

 Indus., 26 {1901), No. 21, pp. 1153, 1154). — This is a summary of the results 

 of experiments by Immendorff, Schmoeger, and Strohmer (E. S. R., 19, p. 424), 

 Mach and Hardt (E. S. R., 18, p. 823), Schulze and Kappen (E. S. R., 18, p. 

 1028), Schneidewind (E. S. R., 18, p. 1029), Wein (E. S. R., 19, p. 19), von 

 Feilitzen (E. S. R., 19, p. 124) and Gerlach, on lime nitrogen, nitrogen lime, 

 and basic lime nitrate (lime niter). 



The results of the various investigations generally agree as to the following 

 points: Lime nitrogen is not adapted to acid humus soils nor to light sandy 



