726 EXPERIMENT STATION RECORD. [Vol. 38 



10 per cent of tar, (4) cyanamid plus 25 per cent of tar, and (5) ammonium 

 sulphate. In each pot were sown 20 oat seeds, in five immediately after manur- 

 ing, and in the other five a fortnight later. The pots were kept in the garden 

 throughout the whole experiment. Sprouting was normal in all the pots, hut 

 shortly after, the plants which had not been manured showed less vigor. 

 . . . The plants matured well and gave the following average yields: (1) Grain 

 7.1, straw 13; (2) grain 12.5, straw 24.2; (3) grain 12.4, straw 23.2; (4) grain 

 12.5, straw 21.6; and (5) grain 12.2, straw 24.3. Nitrogenous manure thus 

 increased the yield by about 70 per cent without there being any visible dif- 

 ference between the various kinds. It may, therefore, be concluded that 

 cyanamid had no harmful effect on the plants." 



In 1915-16 the experiment was repeated with wheat in the open. Six plats 

 of 614 sq. yds. each were used, three of these being treated with 35 lbs. of 

 cyanamid and tar and the other three not manured. The manure was har- 

 rowed in and the seed sown immediately after. " The plats, especially those 

 which had been manured, all looked exceedingly well throughout the experi- 

 ment. Two cwt. of tarred cyanamid (1.6.7 per cent nitrogen) increased the 

 grain yield by 1.04 cwt. and the straw yield by 4.07 cwt." 



A nev/ German phosphatic and potassic manure, C. Begek {Fiililing's Landw. 

 Ztg., 66 (1917), No. 2, pp. 55-58; abs. in Internat. Inst. Agr. IRomcl, Internal. 

 Rev. Sci. and Pract. Agr., 8 {1917), No. 5, pp. 697, 698).— Analyses of a new 

 phosphatic potassic manure made in Germany showed it to contain 8.7 per cent 

 total, no water-soluble, and 6.1 per cent citrate-soluble phosphoric acid ; and 6.3 

 per cent total and 5.6 per cent water-soluble potassium. 



" The author tested this manure on mustard in pots, taking into consideration 

 only the phosphoric acid and comparing it in three different amounts (0.2 gm., 

 0.4 gm., and 1 gm. of P2O5) with manure containing all the chief food materials 

 except phosphoric acid, basic slag, and ' Rhenaniaphosphat.' Basic slag gave 

 the best results ; next came ' Germaniaphosphat ' and ' Rhenaniaphosphat,' 

 which gave yields only equal to 38 to 74 per cent and 48 to 83 per cent, respec- 

 tively, of the yield obtained by the use of slag. ' Germaniaphosphat ' is, there- 

 fore, slightly isuperior to ' Rhenaniaphosphat.' The author considers ' Germania- 

 phosphat ' worthy of use in agriculture, but realizes that his manuring experi- 

 ments only have a limited value and should be repeated." 



The substitution for Stassfurt potash salts of fiinely crushed Austrian 

 phonolites, J. Stoklasa {Osterr. Ungar. Ztschr. Zuckerindus. u. Landw., 1^5 

 {1916), No. 5-6, pp. Jt21-456; abs. in Internat. Inst. Agr. [Romel, Internat. Rev. 

 Sci. and Pract. Agr., 8 (1917), No. 5, pp. 698-700; Chem. Abs., 12 {1918), No. 7, 

 p. 735). — Experiments are reported from which the conclusion is drawn "that 

 potassic salts promote the growth and activity of bacteria useful to the soil. In 

 this respect, however, phonolite is much inferior to kainit and potassium 

 chlorid." 



Bromin content of German potash salts, L. W. Wlnkueb {Ztschr. Angew. 

 Chem.. SO {1917). No. 27, pp. 95, 96; abs. in Internat. Inst. Agr. [Rome], In- 

 ternat. Rev. Sci. and Pract. Agr., 8 {1917), No. 6, pp. 841, 8^2).— Data are re- 

 ported showing that German potash salts contain a fairly high percentage of 

 bromin. 



New experiments on the action of sulphur on crop production, Pfeiffeb 

 {Filhling's Landw. Ztg., 65 {1916), No. 7-8, pp. 193-207; abs. in Internat. Inst. 

 Agr. [Romel, Intermt. Rev. Sci. and Pract. Agr., 8 {1917), No. 1, pp. 32-34).— 

 Plat experiments with barley on a soil rich in organic nitrogen compounds are 

 reported to determine the influence of sulphur when added with barnyard 

 manure and with dried blood. The manure was used at the rate of 8 tons 

 pex acre and the sulphur at the rate of 357 lbs. per acre. 



