734 EXPERIMENT STATION RECORD. 



These results agree in general with those obtained by Wagner and 

 Maercker; nevertheless the author concludes that such experiments do 

 not furnish a reliable means of determining the relative value of differ- 

 ent fertilizers. 



How shall barnyard manure be managed, J. Stoklasa ( Wiener Landw. Ztg., 10 

 {1898), No. 40, p. 330; abs. in Cenibl. Agr. Chem., 28 (1898), No. 1, p. 62).— In tlie 

 author's experiment decomposing liquid manure lost 50 per cent of its nitrogen in 30 

 days. This loss was not entirely prevented when the liquid was kept in deep pits 

 unless these were hermetically sealed. From a test of various preservatives, includ- 

 ing superphosphate and superphosphate gypsum, the author concludes that " bisul- 

 phate," a by-product from the manufacture of nitric acid, is the most effective and 

 economical preservative material. Bisulphate contains 66 per cent of sulphuric 

 acid in the form of acid sodium sulphate and frequently 2 per cent of potassium 

 sulphate. Loss of nitrogen is completely prevented in manure treated with this 

 substance to the extent of 0.5 per cent acidity. The liquid manure treated with this 

 preservative must be applied to the soil alone. If mixed with the coarser manure a 

 loss of nitrogen in the free state occurs. 



Experiments on beets and barley -with manure treated -with superphosphate 

 gypsum, A. Olschbauer (Deut. Landw. Presse, 25 (1898), No. 66; abs. in Centbl. Agr. 

 Chem., 28 (1S99), No. 1, p. 62). — The author concludes from his experiments that 

 superphosphate is not as valuable as a manure preservative as is usually assumed. 

 The best results were obtained by the author with manure preserved with street 

 dirt. 



Farmyard manure, G. E. Day (Ontario Agr. Col. and Expt. Farm Bui. 109, pp. 

 24). — A popular discussion of this subject, based partly upon results of investiga- 

 tions at the experimental farm. The topics treated are constituents of plants, farm- 

 yard manure, solid and liquid excrements, influences which affect the composition 

 of manure, care of farmyard manure, application of farmyard manure, and valuation 

 of fertilizing constituents in manure. 



Manures and composts, H. Boiret (Fumiers et composts. Annecy: Hcrisson $• 

 Co., 1898, pp. 24). 



Fertilizer inspection, C. D. Woods (Maine Sta. Bui. 45, pp. 24). — The results of 

 analyses of 199 samples of commercial fertilizers are reported. The bulletin also 

 includes a comparison of guarantees and analyses of samples collected by the station 

 for 3 years, the chief provisions of the State fertilizer law, and a list of manufac- 

 turers complying with the law in 1898. 



"A comparison of the results of the analyses of the samples collected by the station, 

 with the percentages guaranteed by the manufacturers, shows that, as a rule, the 

 fertilizers sold in the State are vrell up to the guaranty." 



Commercial fertilizers, M. A. Scovell, A. M. Peter, and H. E. Curtis (Kentucky 

 Sta. Bui. 76, pp. 97-105). — This bulletin calls attention to the main features of the 

 State fertilizer law, gives directions for sampling fertilizers, discusses briefly the 

 selection of fertilizers for different crops, and reports analyses of 48 samples of ferti- 

 lizing materials. 



Fertilizer analyses, R. C. Kedzie (Michigan Sta. Bui. 161, pp. 441-456).— This 

 bulletin gives an abstract of the State fertilizer law, with an explanation of its 

 objects ; a schedule of commercial prices, with notes on the valuation of fertilizers ; an 

 explanation of terms used in fertilizer analyses; a brief discussion of the principles 

 underlying the use of fertilizers and of the sources from which nitrogen, phosphoric 

 acid, and potash in fertilizers are derived, and tabulated valuations and analyses of 

 61 samples of fertilizing materials inspected duriug 1898. 



Analyses of commercial fertilizers, II. J. Wheeler and B. L. Hartwell (Rhode 

 Island Sta. Bui. 48, pp. 13-34). — This bulletin deals with changes in the regulations 

 regarding the inspection of fertilizers and cooperation in the work of fertilizer 



