SOILS FERTILIZERS. 1123 



Experiments with artificial fertilizers for sugar beets, F. Lubanski {Sijrav. 

 List. Podolsk. Obslich. Sclsk. Khoz., 1906, No. 3; abs. in Zhur. Opuitn. Agron. 

 \Russ. Jour. Erpt. Landic], <S (W07), No. .'/, p/i. 'I'/l. 'I'l^). — Some of the cou- 

 (.•lusioiis drawn from 6 years' cooperative experiments conducted by the Podolsk 

 Agricultural Society are as follows: (1) Row application of fertilizers was 

 most profitable; (2) all of the soils needed phosphatic fertilizers, some 

 responding best to Thomas slag, others to superphosphate; (3) potash was 

 besc applied as a top-dressing at a later period than the other fertilizers; 

 (4) claritication refuse from sugar factories applied in rows gave favorable 

 results. 



Comparative fertilizer experiments with nitrogen lime, lime nitrogen, 

 nitrate of soda, and sulphate of ammonia for sugar beets, K. Otto (Dcut. 

 Ijtiidir. I'resse, 35 (lOOS), No. 1. p. I). — In an experiment on light loamy sand 

 during the comparatively warm and wet season of 1907 the best results were 

 obtained with sulphate of ammonia, the next best with nitrogen lime, and 

 the poorest results with nitrate of soda. It is suggested that the poor results 

 with nitrate of soda were perhaps due to the washing out of this material 

 from the soil. 



Results of comparative fertilizer experiments with nitrate of soda and 

 sulphate of ammonia, ("lauskn (III us. Landtr. Ztg., 27 (1!)07), No. 98, pp. <S-'/i- 

 8'i5, figs. 2). — Experiments on a variety of crops and soils extending over a 

 number of years are reported (E. S. R., 17, p. 448; 19, p. 320). The results 

 show that the relative efficiency of nitrate of soda and sulphate of ammonia 

 depends to a large extent upon the character of the season, but the author 

 believes that the practical farmer will obtain a higher average efficiency for 

 the sulphate than that given by Wagner, viz, 75 per cent that of nitrate of soda. 



Action of calcium cyanamid on oats under different conditions, K. K. 

 Gedkoitz {Zhur. Opuitn. Agron. [Russ. .Jour. E.rpt. L(nldtc.^, 8 {1907), No. Jj, 

 pp. 383-397). — Pot experiments are described which were carried out in the 

 agricultural chemical laboratory at St. Petersburg with oats grown on three 

 soils, viz, a loamy chernozem, a sandy chei'uozem, and a strongly acid podzol. 

 The action of calcium cyanamid was compared with that of pure calcium 

 nitrate. 



The results indicate that calcium cyanamid is not suitable for top-dressing, 

 although thus applied it gave a slight increase of yield. The poorest results 

 were obtained in all cases when the calcium cyanamid was mixed with the soil 

 2 days before sowing: the best results on the chernozem soils were obtained 

 from mixing 7 days and on the podzol soil 14 days before sowing. In no case, 

 however, did the yield of grain vary considerably with the length of time of 

 application before sowing. The application of 0.3 gm. of nitrogen in the form 

 of calcium cyanamid per pot (containing 5 kg. of soil) gave an increase in the 

 yield of grain of 8(5 per cent that of calcium nitrate on the loamy chernozem, 

 85 per cent on the sandy chernozem, and 74 per cent on the podzol soil. The 

 application of double the quantity of calcium cyanamid on the loam soil gave 

 nearly double the increase of the yield. On the sandy and podzol soils the 

 results were not so favorable. 



Som^e observations on manuring with bone dust, S. Uchiyama {Bnl. Imp. 

 Cent. Agr. E.rpt. Sta. Japan. 1 {1907). No. 2. pp. U).j-120, pi. /).— Sand and soil 

 cultures with barley and soy beans in which bone dust was used in combination 

 with various other substances ar(» reported. 



It was found that magnesite acted like limestone in depressing the avail- 

 ability of bone dust. Gypsum, even in slight excess, was beneficial. The phos- 

 phoric acid of the bone was not so readily available in the presence of sodium 

 508] 9— No. 12—08 P, 



