624 EXPERIMENT STATION EECOED. 



tributable to cyauamid, the second to dieyaudiamid, as shown by pot experi- 

 ments with mustard and buckwheat. 



The high fertilizing effect obtained with lime nitrogen with rye and oats 

 indicate, however, that as a rule the injurious effects of the cyanamid are not 

 marked in practice. 



Taking the effectiveness of nitrate of soda in these experiments as 1(X), that 

 of sulphate of ammonia was 90 and of lime nitrogen 120. No injurious effect 

 was observed in case of oats when the lime nitrogen was applied only one day 

 before seeding. 



Fertilizer experiments with nitrog'en lime for potatoes, A. Stutzee {Jour. 

 Latidic, 56 (1908), No. 2, pp. I4I-IU; Dent. Landw. Presse, 35 {1908), No. 58, 

 p. 620; ahs. in Jour. Chem. 80c. [London], 94 {1908), No. 550, II, p. 726).— 

 Comparative tests of nitrogen lime, nitrate of soda, and sulphate of ammonia 

 in field experiments during 1907 are reported. The best results were obtained 

 with the nitrogen lime, the poorest with ammonium sulphate. This is attributed 

 to the fact that the season of 1907 was very wet. 



Fertilizer experiments with lime niter on tobacco and tomatoes in 1907, 

 A. Stutzer {Zt.scln: Lnndir. Vvr^nchsw. Ostcrr., 11 {1908), No. 5, pp. 531- 

 538). — Pot experiments with varying amounts of lime niter in comparison with 

 nitrate of soda are reported. While the results obtained were not entirely 

 conclusive they indicated that the lime niter, especially when applied in the 

 larger amounts, was as effective as the nitrate of soda. The burning quality 

 of the tobacco was not injuriously affected by the use of the lime niter. 



Experiments in manuring' wheat with calcium nitrate, (1. Paris {Staz. 

 Spcr. Af/r. Ital., J,l {1908), \<>. 2-',. pp. 111-191 : ahs. ii> Chem. Zoitbl.. 1908, I, 

 No. 26. p. 2200). — The author gives the results of experiments as reported by 

 numerous Norwegian, Swedish, Danish, and German investigators, and from 

 them concludes that calcium nitrate and nitrate of soda are equivalent in 

 fertilizing action and that calcium nitrate, on account of its lime content, is 

 to be preferred to nitrate of soda, especially in soils deficient in lime. 



The author's experiment was made on volcanic soil deficient in lime and 

 magnesia and was a comparison of calcium nitrate, nitrate of soda, and nitrate 

 of soda and slaked lime. The results confirm those of the investigators men- 

 tioned above. The author further concludes that calcium nitrate as compared 

 with nitrate of soda has a much greater resistance to denitrifying micro- 

 organisms. This conclusion has also been reached by other investigators. 



On the utilization of the atmospheric nitrogen in the production of cal- 

 cium cyanamid, and its use in agriculture and chemistry, A. Frank {Chem. 

 Neios, 91 {1908), Nos. 2534, PP. 289-292, fig. 1; 2535, pp. 303-306, figs. 2; ahs. 

 in Amer. Jour. Sci.. -'/. scr.. 26 {1908). No. 155, p. 509). — This paper explains 

 the need of finding new means of utilizing atmospheric nitrogen, describes the 

 development of the Frank-Caro process of preparing calcium cyanamid, names 

 the industrial plants ai)plying the process, and discusses the use of the product. 



It is asserted " what makes cyanamid especially valuable as a manure is its 

 after effects. It is generally decomposed by the chemical and bacteriological 

 constituents of the soil into ammonia, which becomes fixed by the vegetable 

 mold, and is not, as with Chili saltpeter, liable to be washed into the drains 

 and so practically lost. For this reason cyanamid which has not been used 

 during the first harvest is always available for the second." 



Phosphate deposits of Algeria and Tunis (Bui. Imp. Inst., 6 {1908), No. 1, 

 pp. 81-83). — This is a brief account of these deposits prepared in view of "the 

 rapidly increasing production of rock phosphates in Algeria and Tunis, and the 

 apparently inexhaustible nature of the deposits in these countries." 



I 



