22 EXPERIMENT STATION RECORD. 



On the importance of recent bacteriological investigations for the question 

 of rational utilization of the nitrogen content of farm-yard manure, H. G. 



SiiDEKBAiM (K. Limdt. Akad. Handl. Tidskr., 40 {1001), No. 4, pp. 272-284). 



The utilization of night soil as manure, K. S. Joshi {Dept. Land Record.^ and 

 Agr., Central Provinces \^India'], Bid. 5, pp. 6).- — The advantages of the method of 

 dumping into shallow trenches with well pulverized Ixittoms from tank carts are 

 explained. 



On minerals occurring in Australian bat guano, It. W. E. MacIvor ( Chem. 

 News, 85 {1902), N'os. 2212, pp. 181, 182; 2215, p. ^27).— Analyses of phosphatic 

 crystals found embedded in bat guano deposits are reported. 



Green manuring on sugar estates {Jour. Jamaica Agr. Soc, 6 {1902), No. 3, pp. 

 99, 100). — The general practice of green manuring to maintain the fertility of sugar- 

 cane lands as is the case in Barbados is recommended. 



The plowing under of green manures for winter plantings, Causemann 

 {Dent. Jjindw. Presse, 29 {1902), No. 27, pp. 282, 233). 



Experiments to test the value of 40 per cent potash salt as compared with 

 kainit, ]\I. ISIaekckek and W. Schneiuewind {Arh. Dent. lAindw. GcselL, 1901, No. 

 56, pp. 240; 1902, No. 67, pp. 170; ahs. in Chem. Ztg.,26 {1902) , No. 16, Reperl., p. 53) . — 

 These are detailed accounts of cooperative exi^eriments during 2 years by a number 

 of experiment stations in different parts of Germany to test the value of this new 

 potash fertilizer. The 40 per cent salt is prepared from (1) carnallit or hartsalz h»y 

 concentration, (2) sylvinit, (3) a mixture of crude, low-grade salts with potassium 

 chlorid. The average composition of the product as put on the market is stated to 

 be as follows: Moisture 3.6 per cent, potassium chlorid 62.5 per cent, potassium 

 sulphate 1.9 per cent, magnesium sulphate 4.2 per cent, magnesium chlorid 2.1 per 

 cent, sodium chlorid 20.2 per c:ent, gypsum 2.4 per cent, insoluble matter 3.1 per 

 cent. The average jiercentage of potash is 40.53. In these experiments it was found 

 that kainit gave better results than the 40 per cent salt on cereals on both light and 

 heavy soils, and there was no appreciable injurious effect on the mechanical condi- 

 tion of the soil. In case of potatoes, however, the yields both of total crop and of 

 starch were larger with the 40 per cent salt than with kainit. The highly bred 

 varieties of sugar beets, unlike potatoes, appear to be very indiffei-ent to mineral salts. 

 The sugar content was increased by the application of the potash salts. The 40 per 

 cent salt and the kainit were about equally effective. The 40 per cent salt may, 

 however, be preferable for this crop, l^ecause it can be applied in large amounts 

 without danger of injuriously affecting the mechanical condition of the soil. 



Field experiments with ammonium sulphate in the Province of Poseu, 

 Kloepfer {Filhling's Landw. Zlg., 51 {1902), Nos. 6, pjp. 193-197; 7, pp. 231-233).— 

 Experiments on beets and potatoes with barnyard manure, and superphosphate 

 with ammonium sulphate ami sodium nitrate singly and combined are reported. 

 There was a very close agreement in the results obtained from the use of the two 

 sources of nitrogen. 



Fertilizer experiments on moor soils, H. von Feilitzen {Jour. Landw., 50 

 {1902), No. 1, pp. 77-90, pis. <?). — A brief account of experiments with pota.ssic, 

 phosphatic, and nitrogenous fertilizers at Flahult during 1887-1899. The soils were 

 generally benefite<l by api^lications of jiotash and phosphoric acid, but responded 

 most favorably to a]i{)lications of nitrogen. 



Phosphatic fertilizers for moor soils, K. C. Lassen ( Ugeskr. Landm., 47 {1902), 

 No. 6, pp. 70-72) . 



The better utilization of the nitrogen supply of the soil and air as a result 

 of liberal applications of phosphoric acid, F. Giersberg {Deut. Landw. Presse, 

 29{1902), No. 37, p. 318, fig. i).— Applications of from 200 to 800 kg. per hectare (178.51 



