SOILS — FERTILIZERS. 427 



a thesis sumbitted for the degree of doctor of philosophy at the University of 

 Greifswald. The author discusses the extent, topographic featui'es, formation, 

 vegetation, settlement, and commercial importance of the heath lands sur- 

 rounding Uckermiinde, Pomerania. The character of the soil and the changes it 

 has undergone are discussed. A bibliography is appended. 



Moor culture plat experiments, 1910, H. von Feilitzen and A. Batjman 

 (Svemka Mos.skultitrfor. Tid>-kr., 25 {1911), So. 2, pp. i57-i73).— Experiments 

 on 65 plats in IS different counties in Sweden were arranged for by the associa^ 

 tion. The experiments included tests of soil amendments and fertilizer and 

 variety tests with small grnins and soiling and hay crops. 



The problem of " bare patches," W. A. Haegreaves (Jour. Dept. Agr. So. 

 Aust., Ui (1911), No. 9, pp. S3G-8Ji6). — The author reports the results of chemi- 

 ical analyses and of pot tests of soils from different localities of South Australia 

 to determine the cause of the infertile portions (bare patches) of these soils. 



It Is concluded that the sterility is due to excessive quantities of soluble salts. 

 Chlorids and sulphates seemed to predominate. The probable action of the 

 soluble salts in retarding plant growth is discussed. 



Carbon bisulphid as soil renovator, C. J. J. van Hall (Tevsmannia, 22 

 {1911), No. 2-3, pp. 152-162). — This is a brief review of experiments by other 

 investigators. 



Citrus experiments, A. W. Blair (Florida Sta. Rpt. 1910, pp. XXV-XXXIV, 

 figs. 6). — This is a brief account of the plan and progress of these experiments, 

 dealing especially with the fertilizers used, the installation of air and soil 

 thermographs, the composition of soils used and of orange leaves and stems 

 grown on the experimental plats, and the installation of soil tanks for sup- 

 plementary studies on the fertilizer requirements of citrus fruits (E. S. E., 

 25, p. 117). 



Heavy root feeding and the dungheap, J. Hendrick (Tran.'i. Highland and 

 Agr. Soc. t^cot., 5. scr., 23 (1911), pp. 32-39). — It is shown in this article that 

 about 85 per cent of the nitrogen consumed by animals in case of heavy feeding 

 with roots is lost in the form of liquid manure, this loss being much greater 

 than in the case of feetling with linseed cake or other concentrated nitrogenous 

 feeding stuffs. 



The production, control, and use of commercial fertilizers, T. Alexander 

 (Osterr. Chcm. Ztg., IJ, (1911), No. 7, pp. 82-87; ahs. in Chem. Zentbl., 1911, 

 I, No. 18, pp. 1374, 1375). — This is a general review of the subject with special 

 reference to Austrian conditions. 



Vegetation experiments with miscellaneous materials used as direct or 

 indirect fertilizers, J. G. Lipman, P. E. Brown, and I. L. Owen (Neio Jersey 

 Stas. Rpt. 1909, pp. 183-208, pis. 7).— Pot tests of " phospho-plaster," a by- 

 product of superphosphate manufacture, low-grade rock phosphate, peat, cal- 

 cium carbonate containing a small amount of borates, gypsum containing boric 

 acid, and greensand marl are reported. 



The peat tested in these experiments was from a deposit in Warren Co., 

 N. J., which is being exploited as a fertilizer and fertilizer filler and contained, 

 sun-dry, 1.G6 per cent of nitrogen, and "bone-dry," 2.G6 per cent of nitrogen. 

 In experiments with rye " the application of 1 gm. of nitrogen in the form of 

 sun-dry humus increased the yield of dry matter from 2.15 gm. to 7.6 gm., 

 while 2 gm. of humus nitrogen increased it to 11.4 gm., and 3 gm. to 13.5 gm. 

 of dry matter. A similar increase occurred also in the pots where bone-dry 

 humus was used, except that the absolute yields were not as large. Further- 

 more, the increasing amounts of humus increased the proportionate amount of 

 nitrogen in the dry matter. . . . The nitrogen of the sun-dry humus was 

 more available than that of the bone-dry humus. Evidently the drying of the 



