422 EXPERIMENT STATION RECORD. 



conclude that tlie addition of superphosphate to liquid manure in the quan- 

 tities generally used in practice has little or no tendency to prevent the nitro- 

 gen losses due to the evaporation of ammonia from the soil, also that the effect 

 of the liquid manure on the superphosphate is to render a part of the phos- 

 phoric acid insoluble. Field experiments on the utilization of the nitrogen 

 of liquid manure in the production of green forage verified the results of the 

 prevous experiments referred to above regarding the losses of nitrogen 

 through evaporation. They further indicate that the neutralization of liquid 

 manure vi^ith superphosphate is not feasible, but that the practice of making 

 relatively large applications of liquid manure in the production of green forage 

 may be follow^ed provided the soil does not become deficient in phosphoric acid. 



Sodium nitrate v. ammonium sulphate, K. Pospf§iL (Wiener Lanclw. Ztg., 

 64 {1914), No- 18-19, pp. 163, 164). — Comparative tests of sodium nitrate and 

 ammonium sulphate in field experiments with sugar beets extending over four 

 years, two of which were dry and two wet, showed that the sulphate gave better 

 results than the nitrate in the wet seasons, although the nitrate gave better 

 results in the dry seasons and as an average of the four years. 



Pot experiments with ammonium sulphate containing sulphocyanid, A. 

 Stutzer and S. Gov (Jour. Landw., 62 {1914), No. 2, pp. 149-158; aJ)S. in Jour. 

 Cheni. /S'ot;. [London], 106 (1914), No. 621, I, p. 916). — Previous investigations 

 on this subject by others are reviewed and a brief bibliography of the subject is 

 given. The author made water culture and pot experiments on corn, mustard, 

 summer rye, oats, wheat, and barley with commercial ammonium sulphate and 

 mixtures of pure salts containing varying amounts of sulphocyanid. 



In the water cultures it was shown that small amounts of sulphocyanid were 

 stimulating but larger amounts were toxic. In the soil cultures the results 

 confirm those of Wollny and Bohmer in showing that ammonium sulphate con- 

 taining as much as 1 per cent of sulphocyanid can be safely used if applied at 

 ordinary rates. 



Mixing lime nitrogen with Thomas slag and kainit, Gerlach and O. Tiede- 

 MANN (Illus. Landw. Ztg., 34 (1914), No. 28, p. 273). — Experiments with oiled 

 calcium cyanamid as well as with mixtures of 3 parts of kainit, 2 of Thomas 

 slag, and 0.5 and 1 of cyanamid are briefly reported. 



The oiled cyanamid gave somewhat better results as measured by crop yields 

 than the untreated. It was found that the mixtures of kainit, slag, and 

 cyanamid were of good mechanical condition and underwent little chemical 

 change except a small toss of water-soluble potash in 10 days. 



The effects of the ensilage process on the solubility of floats, E. B. Forbes 

 and C. M. Fritz (Jour. Indus, and Engin. Chem., 6 (1914), No. 3, pp. 222, 223).— 

 Floats was mixed with' corn in the proportion of 1 part of the former to 250 

 parts of the latter, and the mixture was ensiled in earthen jars for 6 months. 



Determinations of the different forms of phosphoric acid in the original 

 material and in untreated and phosphated silage are reported, and showed that 

 the water-soluble and citrate-soluble phosphorus in the phosphated silage 

 was not higher than in the untreated silage. There was, however, a very 

 considerable increase in inorganic phosphorus soluble in 0.2 per cent hydro- 

 chloric acid, the phosphated silage containing more than twice as much as the 

 untreated silage. The authors conclude from these results that "the ensilage 

 of corn will render soluble in 0.2 per cent hydrochloric acid such an amount 

 of the phosphorus of floats added to corn as to constitute a practical consid- 

 eration In the feeding of live stock." 



The production of phosphate rock in 1913, W. C. Phalkn (U. 8. Oeol. Sur- 

 vey, Mineral Resources of the Umted States, Calendar Year 1913, pt. 2, pp. 

 273-289). — Statistics of production in the United States and other countries are 



