1022 EXPERIMENT STATION RECORD. 



barley are reported wlilcli indicate that '* tlie cheapest and the most effective 

 magnesium compound for the regulation of the lime factor in a soil very rich in 

 lime is the crystallized sulphate. The most effective method of application of 

 the magnesium sulphate is top-dressing, rei)eated annually in small doses." 

 On the loamy humus soil used in these experiments 10 parts of this salt was as 

 effective as 100 parts of the finest powdered magnesite, when applied before 

 sowing and mixed with the whole soil, while in the form of top-dressing 1 part 

 of the sulphate had the same effect as 100 parts of magnesite. 



The stimulating' effect of manganese salts on crops, H. von Feilitzen 

 (Jour. Landiv., 55 (1907), Xo. J,, pp. 289-292; abs. in Chem. ZentbL, 1908, I, No. 

 S, p. 287). — Experiments are briefly reported in which an application of 10 

 kg. per hectare (11.2 lbs. per acre) of manganese sulphate produced no increase 

 of grain or straw in case of oats grown on raw upland moor land. 



Sodium chlorid as a fertilizer for beets, H. Briem (Dcut. Laiiilw. Presse, 

 S-'i (1907), \o. 96, pp. 752, 753). — Experiments by Damseaux. Pfeift'er, and 

 others, which indicated that under certain conditions sodium chlorid may give 

 as good results as potash salts, are briefly noted. 



Are soils containing less than 0.02 per cent SO;; benefited by special 

 manuring with sulphates? G. Daikuhara (Bui. Imp. Cent. Agr. E.vpt. Sta. 

 Japan, 1 (1907), No. 2, pp. 135-l.'i3). — The pot experiments with three soils 

 reported in this article indicated that even less than 0.02 per cent of sulphuric 

 acid (SO3) was quite suflicient to meet the requirements of barley plants for 

 sulphur. 



A review of modern fertilizer production, T. Waage (Saatcii, Diinger u. 

 Futtermarkt, 1907, iYo.s. J,5, pp. 1281-1288, figs. 13; .',6, pp. 1289-1296, figs. 16; 

 J,7, pp. 1297-130.',, figs. 17; .',8, irp. 1305-1312, figs. 18; i,9. pp. 1313-1319, figs. 

 12). — The present status of the guano, nitrate, phosphate, and potash indus- 

 tries, and of the manufacture of phosphatic slags, and of nitrogen compounds 

 from the air, is reviewed in this profusely illustrated article, which is an ad- 

 dress delivered before the recent convention of German fertilizers and feeding 

 stuffs manufacturers and dealers held in Berlin. 



Fertilizers, T. Dietrich et al. (Jahrcsbr. Agr. Chem., 3. ser., 9 (1906), pp. 

 1 18-180). — This is the usual review of investigations (up to the end of 1906) on 

 composition, preservation, etc., of fertilizers, methods and results of fertilizer 

 control, and fertilizer experiments. An extensive classified bibliography is 

 given at the end of the chapter. 



The manufacture of fertilizers in American slaug'hterhouses (Chem. Ztg., 

 31 (1907), No. 90, pp. 1119, 1120).— Brief accounts are given of the preimratiou 

 of tankage, dried blood, steamed bone, azotin. and hoof meal, and of the use of 

 these materials in the preparation of complete fertilizers. The last census is 

 quoted to show that the production of slaughterhouse fertilizers in 1900 

 amounted to 100,902 tons valued at $3,320,119, and it is pointed out that the 

 production has greatly increased since that date. 



Soil amendments and commercial fertilizers (Statis. Bclg. Recense. Agr., 

 1906, Purtie Analyt., pp. 38, 39; Partie Doe., pp. 7 i^-igy).— Statistics of con- 

 sumption of different fertilizing materials throughout Belgium are given in de- 

 tail. The total consumption of various fertilizers in Belgium during 1906 was 

 707,580. tons. 



Commercial nitrogen, R. McMurtrie (Amcr. Fert., 27 (1907), No. 6, pp. 11- 

 15). — The production, processes of manufacture, and future supply of nitrogen 

 from various sources, including Chilean nitrate, annnouium sulphate, slaughter- 

 house by-products, cotton-seed meal, garbage tankage, and miscellaneous mate- 

 rials, are briefly discussed. 



