260 SOIL SCIENCE [Bot. Absts. 



1790. Schatzlein. [Rev. of- Sidenius, E. Diingungsversuche zu Tabak 1915 bis 1916. 

 (Fertilizer experiments on tobacco, 1915-1916.) Mededeel. Prcefstat. Vorstenlandsche Tabak 

 26:1916.] Biedermann's Zentralbl. Agrikulturchem. 47:318-320. 1918.— Ammonium sul- 

 phate in tobacco culture gave good results. Six grams per plant gave 17.6 per cent, 10 grams 

 gave 15.3 per cent and 16 grams 21.4 per cent increase. The quality was better and the leaves 

 were longer than in tobacco grown in unfertilized soil. The burning was affected detriment- 

 ally to only a very slight degree. The poor burning quality of tobacco grown on fields fer- 

 tilized with barnyard manure at Kebon-Argoon is ascribed to the chlorine content of the 

 manure. Experiments conducted in other regions of Java have generally given similar results. 

 —F. M. Schcrlz. 



1791. Skinner, J. J., and C. F. Noll. The botanical composition of a permanent pasture 

 as influenced by fertilizers of different compositions. Soil Sci. 7: 161-179. 1919. — The yield 

 of hay, lime requirement of the soil and botanical composition of the hay from a 6 year fertil- 

 izer experiment with grass on Hagerstown loam is reported. The fertilizers used were acid 

 phosphate, sodium nitrate and potassium chloride. Each fertilizer was used alone and in 

 combination of 2's and 3's, the ingredients varying by 10 per cent stages according to a tri- 

 angular diagram. The yield of hay was greatest on those plots fertilized with mixtures high 

 in nitrogen. Plots receiving mixtures of acid phosphate and potassium chloride, but no 

 sodium nitrate, show the highest lime requirement. The original composition of the vegeta- 

 tion was Canada blue grass, Kentucky blue grass and white and red clover. At the end of 7 

 years Kentucky blue grass has become predominent. Clover has been crowded out of plots 

 receiving high ratios of nitrogen, the largest amount of clover occurring in the no-nitrogen 

 series of plots. — William J. Robbins. 



1792. Volhard, J. [Rev. of: Pfeiffer, Th., and W. Simmermacher. Uber die Wir- 

 kung des Dicyandiamids auf das Pflanzenwachstum. (The action of dicyandiamide on the 

 growth of plants.) Landw. Versuchsst. 90:415-430. 1917.] Biedermann's Zentralbl. Agri- 

 kulturchem. 47 : 243-246. 1918. — The germination of oats is not affected by considerable quan- 

 tities of dicyandiamide but the growth of the plants and the yield of the grain are seriously 

 injured. The quantity of dicyandiamide found in crude calcium cyanamide is quite small 

 but the substance should be considered as an impurity that may possibly have an injurious 

 effect on the crops. — F. M. Schertz. 



FERTILIZER RESOURCES 



1793. Anonymous. El precio de los abonos quimicos. [Price of chemical fertilizers.] 

 Informacion Agric. [Madrid] 9: 97-9S. 1919. — Prices and stock on hand in France are com- 

 pared with conditions in Spain. — John A. Stevenson. 



1794. Anonymous. Nuevo procedimiento de obtencion artificial de sales potasicas. 

 [New methods for obtaining potash salts artificially.] Informacion Agric. [Madrid] 9: 145- 

 146. 1919. — An account of the new methods devised in the United States and Great Britain 

 for obtaining potash from smelter and cement plant waste. — John A. Stevenson. 



1795. Blanck. [Rev. of: Blanck, E. Der Phonolith ein Stickstoffdiinger. (Is phono- 

 lith a nitrogenous fertilizer?) Landw. Versuchsst. 90: 33. 1917.] Biedermann's Zentralbl. 

 Agrikulturchem. 47:283. 1918. 



1796. Blanck. [Rev. of: Blanck, E. Beitrage zum bakteriologisch-chemischen Um- 

 satz der Milcheiweissstoffe, insbesondere Galalith, im Boden. (Contribution on the bac- 

 teriological-chemical exchange of milk proteins, especially galalith, in soils.) Landw. Ver- 

 suchsst. 90: 17. 1917.] Biedermann's Zentralbl. Agrikulturchem. 47: 2S3-284, 1918.— A very 

 favorable result is reported by using galalith as a source of nitrogen for field crops. Experi- 

 ments on the decomposition of protein of galalith (a by-product of milk) were carried out in 

 a sandy soil. No nitrification of the split off ammonia was observed. The galalith served 

 as a constant source of nitrogen for the growing plants. — F. M. Schertz. 



