216 EXPERIMENT STxVTION RECORD. 



The higher percentage of potash in the south coast soils is attributed to the 

 predominance of granite in that region. The author believes that in order to 

 interpret a soil analysis correctly, the position of the soil, its geological forma- 

 tion, and the climate of the district must be known. 



The German moors and their agricultural importance, Tacke {Illus. 

 Laiuhc. Ztg., 31 (Wll), No. 16, pp. 1. ', 3-1 'i 6). —This is a general discussion on 

 the extent and agricultural possibilities of these lands, with a view to stimu- 

 lating their reclanialion. 



Moor cultivation in Germany, Oliver (Jour. Bd. Agr. [London], 11 (1911), 

 No. 12, pp. 909-1002). — This article deals briefly with the origin, composition, 

 manuring, and management of upland and lowland moors in Germany, par- 

 ticularly in the region of Hamburg. Special emphasis is laid upon the use of 

 moors as meadows. 



The acid content of moor water, K. Endell (Jour. Pralct. Chem., n. ser., 82 

 (1910), No. 19-21, pp. J,1J,-J,22; ahs. in Chcm. Ztg., 35 (1911), No. 10, Repert, 

 p. 57). — Tests showed a decided acidity in the water from a number of moors. 

 This acidity is attributed entirely to free carbon dioxid. The brown-colored 

 humus colloids removed from the water by dialysis were not acid. 



The improvement of marsh, soils, Luedecke (Ztschr. Landw. Kammer 

 Schlesien, 15 (1911), Nos. 9, pp. 266-272; 10, pp. 300-306; 11, pp. 333-338).— 

 The author discusses the fertilizer constituents, agricultural value, and 

 reclamation of these soils. He is of the opinion that stock farming, whereby 

 much of the land could be sown to grass and clover, is the best use to make 

 of the lands, and gives data showing the profits that may be obtained per acre 

 under such a system of farming. Methods of cultivating and seeding are 

 outlined. 



How can the farmer maintain the fertility of the soil? C. G. Hopkins 

 (Bien. Rpt. Eans. Bd. Agr., 17 (1909-10), pp. 10-20).— TMb article deals in a 

 popular way with the cause and rate of depletion of soil fertility and the value 

 and use of crop rotations and farm manures in improving soils. 



The value of different crops as green manures, A. D. Hall (Jour. Bd. Agr. 

 [I^ondon^, 17 (1911), No. 12, pp. 969-97 -'i). — Attention is called to results of 

 experiments at Rothamsted on heavy soils which do not agree with those of 

 experiments at Woburn on light soils as to showing that mustard is more 

 effective as a green- manure for wheat than vetch. In the Rothamsted experi- 

 ments the yield and nitrogen content of wheat were uniformly higher following 

 crimson clOA-er and vetch than after mustard or rape. 



The fisheries and the guano industry of Peru, R. E, Cokeb (TJ. 8. Dept. 

 Com. and Labor, Bur. Fisheries Bui. 28 (1908), pt. 1, pp. 333-365, pis. 6).— The 

 fisheries and the guano industry are discussed together in this article, as strictly 

 the guano may be considered a fishery product, and it is impossible to separate 

 the two in protective and regulative measures, which it is the main purpose 

 of this article to discuss. The guano-producing birds are described, and the prin- 

 ciples which should underlie regulations ' for the protection of the birds and 

 the extraction of the guano are set forth. 



Bat and bird guanos in India, I, H, Burkill (Agr. Ledger, 1911, No. 1 

 (Anim. Prod. Ser., No. 3), pp. 1-9). — The character, composition, extent, and 

 exploitation of guano deposits in different parts of India are briefly discussed 

 in this article. It is shown that the guanos are very variable in composition, 

 but are generally comparatively rich in phosphoric acid and poor in potash and 

 nitrogen. As a rule the deposits are too small in extent to be of any except 

 local interest. 



Report of experiments with nitrogenous manures, T. Milburn and R. C. 

 Gaut (County Council Lancaster, Ed. Com., Agr. Dept., Farmers' Bui. 20, pp. 



