SOILS FEKTILIZERS. 125 



Studies on evaporation, A. Demolon and G. Bkouet (Sta. Agron. Aisne Bill., 

 1912, pp. 58-62). — Tliis is an account of a continuation of studies on factors 

 affecting evaporation from soil (E. S. R., 25, p. 115), the previous article deal- 

 ing particularly with a special form of evaporimeter used. 



The observations recorded showed the minimum of evaporation during periods 

 of cloudiness and rainfall and the maximum evaporation during the prevalence 

 of east winds. Direct solar action during the summer had an important in- 

 fluence on evaporation. Evaporation was reduced but still active during the 

 night. Those agencies which reduced capillary circulation diminished evapora- 

 tion and preventeti it from attaining a maximum during hot summer days. 



Lysimeter investigations, 1912, E. IvRtJGER {Mitt. Kaiser Wilhelms Inst. 

 Lnndw. Bromherg, 5 {1913). No. 3, pp. 2^7-251).— The observations here re- 

 ported were the same as those of previous years (E. S. R., 27, p. 19). The 

 results for 1912 were unusual on account of the abnormally wet season. 



Soils of the Sutter Basin {U. 8. Dept. Agr., Bur. Soils Circ. 19, pp. 10, fig. 

 1). — This is a brief report upon a resurvey of certain soils in the Marysville 

 area, California, which was originally surveyed in 1900. The further study of 

 soil conditions in this basin was made in view of " a proposed engineering 

 project of considerable magnitude, involving protection of the lands of the basin 

 by an extensive system of levees and artiflcial overflow channels and the drain- 

 ing of the lands by installation of pumping plants." 



The soil conditions of the river plains regions of Obrigheim and Colgen- 

 stein, Eavaria, O. Baueb and J. Weigert {Landw. Jahrb. Bayern, 2 {1912), 

 No. 8, pp. 5^5-564, figs. 2). — The soil conditions of these regions are discussed 

 In their relation to practical soil valuation. 



"What the United States is doing' toward the conservation and improve- 

 ment of soil fertility, F. K. Cameron {Orig. Commun. 8. Intcrnat. Cong. Appl. 

 Chem. [Washuigfon and New York}, 26 {1912), Sects. Vla-XIh, App., pp. 

 699-706). — This is a brief review of progress in this country in soil surveying 

 and in investigations relating to soil physics, soil solution, composition and 

 biological properties of the soil, effects of rotations and fertilizers, and the 

 adaptation and use of soils. 



Report on cooperative fertilizer and variety tests, Zealand, 1912, O. H. 

 Larsen {Ber. Landhofor. Virks. Planteavl. Sjdlland, 1912, pp. 4-50, figs. 16).— 

 The report describes, and gives detailed results obtained in. cooperative ex- 

 perimental work during the year by members of the Zealand County Agricul- 

 tural Society. The trials included 512 different series of fertilizer, liming, and 

 field tests with the ordinary agricultural crops of Denmark. Of this number 

 57 series were rejected for various causes. The following fertilizer trials are 

 of more general interest : 



Comparison of nitrogenous fertilizers. — The trials were conducted on differ- 

 ent kinds of soils with small grains, mangels, ruta-bagas. and potatoes during 

 the seasons 1907-1912, the effects of corresponding quantities of sodium nitrate. 

 Norway nitrate, calcium cyanamid, and ammonium sulphate being studied. 

 Placing the yields obtained by sodium nitrate over and above those on the con- 

 trol plats (no fertilizer) at 100, those obtained with the other nitrogenous 

 fertilizers mentioned in the case of the different crops experimented with were 

 as shown in the table following: 



