FIELD CROPS. 



533 



with mineral superphosphate in mixed fertilizers showed that there 

 was no practicable combination of them with the superphosphate which 

 would give a product containing as high a percentage of fat as the bone 

 superphosphate. The fat determination therefore offers a means of dis- 

 tinguishing between the two classes of superphosphates. 



Permanency of effect of lupines as green manure, L. Grandeau {Jour. Agr. 

 Prat., 1898, II, No. 43, pp. 590, 591). — The author's experiments confirm those of Schultz- 

 Lupitz in showing that lupines exert an effect on crops for at least 2 years after turn- 

 ing under. 



On green manuring, Bumper ( Ueber Griindungung. Schoneberg-Berlin: Stahcl, 

 lS9S,pp.4S). 



Contribution to the knowledge of the bacteria in barnyard manure -which 

 decompose nitrates, Krexz and M. Gerlach (Jahresber. Landw. Vers. Stat. Jersitz- 

 oei-Fosen, lS97-98,pp. 13-20). 



Molasses as a fertilizer, P. BOname (Bap. Ann. Sta. Agron. [Mauritius'], 1897, pp. 10, 

 11). — The value of molasses as a fertilizer is briefly discussed and the results of 5 

 analyses are reported, from which the following table is calculated: 



Fertilizing constituents per 100 gallons of molasses. 



Nitrogen. 



Phosphoric 

 acid. 



Potash. 



Sample 1 

 Sample 2 

 Sample 3 

 Sample 4 

 Sample 5 



Pounds. 

 4.75 

 7.00 

 7.83 

 6.16 

 5.25 



Pounds. 

 1.33 

 .58 

 .66 

 .75 

 .75 



Pounds. 

 27.00 

 22.00 

 22.25 

 22.06 

 19.30 



Investigations on the action of sulphate of ammonia and nitrate of soda, G. 

 Kloepfer (Vntcrsuchungen iiber die Wirkung des scliwefelsauren Ammoniaks unci des 

 Chilisalpeters. Essen: C. 1). Baedeker, 1898, pp. 59, figs. 11). — Numerous experiments 

 by the author and by other investigators with different crops on a variety of soils 

 are cited to show that sulphate of ammonia is as effective on certain classes 1 of 

 soils and on the majority of crops as nitrate of soda. Sulphate of ammonia gives 

 best results on basic soils and should be used on soils deficient in bases ouly in con- 

 nection with lime in some form — marl, burnt lime, or Thomas slag. The desirability 

 of more completely collectiug the sulphate of ammonia produced by coke ovens, with 

 a view to cheapening this valuable domestic source of nitrogen, is strongly urged. 



The production and consumption of Thomas slag and superphosphate in the 

 world, Maizieres (L'Engrais, 13 (1898), No. 43, pp. 1019, 1020).— It is estimated that 

 the production of superphosphate in 1897 was 4,000,000 tons, of slag 1,400,000 tons. 

 The average consumption per hectare of slag in different countries is giveu as fol- 

 lows : Austria 2.41, Russia 3, Italy 7.85, France 12.80. Germany 29.57, England 40.25, 

 and Belgium 101.87 kg. 



Ground limestone in agriculture, N. Heilbran (Das Ealksteinmehl im Dienste der 

 Landwirtschaft. 1898, The Author; rev. in Ztschr. Fleisch u. Milchhyg., 9 (1898), No. 2, 

 p. 37). 



FIELD CROPS. 



Field experiments at the experiment farm at Lauchstadt in 

 1895 and 1896, M. Maercker (Landw. Jahrb., 27 {1898), No. 1-2, pp. 

 82-174). — This work consisted of fertilizer experiments on meadows and 

 with sugar beets, barley, and alfalfa; variety tests of different field 



