526 EXPERIMENT STATION EECOED. 



green oats and hay crops. In order to give similar yields tbey require larger 

 amounts of plant food than the latter, this being preferably given in the form 

 of artificial fertilizers. Nevply broken marsh land calls for applications of 

 soluble nitrogen similar to mineral soils and larger applications of potash and 

 especially phosphate; in addition, lime must be supplied in similar amounts. 



The action of mineral fertilizers on the permeability of soils, P. Larue 

 (Rev. Sci. [Parisi, 48 {1910), II, No. 27, pp. 8.'i2, 8.^3).— Results obtained in 

 investigations by Garola, Pearson, Kravkov, and Blanck (E. S. R., 23, p. 121) 

 are briefly discussed, and it is shown that Blanck's results confirm those of 

 Garola as regards the retarding effect of nitrate of soda on permeability. The 

 results of the two investigators also agree in showing that both lime and 

 potash increase the permeability. 



On the other hand, Pearson and Kravkov concluded from their investigations 

 that potash salts, as well as nitrate of soda, decreased percolation. 



Results of field experiments to determine the fertilizer needs of soils ( Bui. 

 Admin. Affi: [Brussels^, 3 {1910), No. 10, pp. 373-403). — This is an account 

 of field experiments made during 1906 to 1909 on typical soil areas in Bel- 

 gium, from which conclusions are drawn as to the fertilizer needs of the par- 

 ticular soils experimented with and also as to the unavoidable error in such 

 experiments. It was found in 58 experiments that the average variation be- 

 tween the results on three plats fertilized and treated in exactly the same way 

 was S.25 per cent, and was in some cases as high as from 10 to 12 per cent. 



Report of field and fertilizer trials conducted by the Swedish Moor Culture 

 Association, 1909, H. von Feiutzen {Svenska Mosskulturfor. Tidskr., 24 

 {1910), Nos. 4-5, pp. 382-434, flgs. 8; 6, pp. 471-507).— The report describes 

 trials conducted during the year at Jonkoping, Flahult, and Torestorp stations. 

 Full meteorological data for the three stations, soil temperatures, and readi^ngs 

 of the depth of the water table on the different experimental fields and plats 

 are also given. 



Fertilizer trials and variety tests conducted by county ag'ricultural socie- 

 ties in Sweden, 1909, P. Bolin {K. Lmidtbr. Akad. Handl. och Tidskr., 49 

 {1910), Ko. 6, pp. 449-489, dgms. 2). — The main results of 594 separate trials 

 conducted in 17 different counties are given and discussed. The trials included 

 fertilizer experiments and variety tests with the small grains, root crops, 

 meadows, alfalfa, and lupines. 



Storage experiments with farm manure, F. Hansen and R. K. Kristensen 

 {Tidsskr. Landhr. Planteavl, 17 {1910), No. 1, pp. 1-78, flgs. .13).— The experi- 

 ments here described were of a preliminary nature and were made with a view 

 to insuring correct methods of sampling and analysis of farm manure in the 

 extensive manure storage experiments that are to be conducted at the experi- 

 ment stations at Aarslev and Studsgaard. The .results obtained showed that 

 farm manure under favorable conditions of storage can be kept for 9 months 

 without losing more than from 6 to 7 per cent of its nitrogen. The main part 

 of the report is taken up with discussions of the methods of sampling and 

 analysis of farm manure. 



Fertilizer experiments, L. B. McWethy and J. D. Towar {Wyoming Sta. 

 Rpt. 1910, pp. 53, 54). — Tests are reported which show that nitrate of soda was 

 very beneficial to oats and barley. 



The nitrate industry, B. D. Ossa {BoI. Soc. Fomento Fahril [Chile], 27 

 {1910), No. 11, pp. 741-748, dgms. 4). — The present status of this industry is 

 described, statistics of production, exportation, consumption, and prices from 

 1880 to 1910 are given, and the various uses made of nitrate are discussed and 

 graphically illustrated. 



