CONTENTS. Ill 



Page. 



Classification of soils according to climates 314 



Agrogeoloiiical field work, Horusitzky 314 



What should be in agrogeological reconnaissance and special charts? Timko. . 314 



The preparation of agrogeological reconnaissance and special charts, Giill 314 



The special value of soil analysis in intensive agriculture, Leplae 314 



Analysis, classification, and principal properties of clay soils, Atterberg 315 



Agricultural soils. Baker, Clark, and Hirsch 315 



The chemical composition of some [Texas soils], Fraps 315 



Nitrogen and carbon in virgin and fallowed soils of eastern Oregon, Bradley.. 315 



[Soils of Trinidad], Carmody 315 



Analyses of soils of the Palazzo farm near Bologna, Giglioli 315 



Agronomic chart work in Bohemia, Kopecky 315 



Soil properties of the Koros flood region, Ujj 315 



Soil zones of Roumania, IMunteanu-Murgoci 315 



Soil conditions in Norway, Bjorlykke 315 



Soil zones and soil types of European and Asiatic Russia, Glinka 316 



Soil temperatures in the Black Poorest and Egypt, Koenigsberger et al 316 



The nature of the color of black cotton soil, Annett 316 



Influence of autumn plowing of summer cereals at Poltava Station, Tretyakov. 316 



Effect of steam sterilization on water-soluble matter in soils, Lyon and Bizzell. 316 



On the biochemical cycle of phosphoric acid in cultivated soils, Perotti. . 317 



Bacterial activity as a corrosive influence in the soil, Gaines 318 



Legume bacteria, Edwards 318 



Methods of legume inoculation, Kellerman 318 



A contribution to the nitrogen problem under dry farming, Alway and Trumbull . 318 



The fertilizing influence of sunlight, Russell 318 



Soils and their fertility, Pettit 318 



In what does the fertility or sterility of the soil consist? Massart et al 318 



The principles of maintaining soil fertility. Miller 318 



Soils and manures, Murray 319 



Plain talks on the use of fertilizers, Voorhees 319 



Farm practice in use of fertilizers in South Atlantic States, Beavers 319 



Pot culture experiments, 1908, Voelcker 319 



Some secondary actions of manures upon the soil, Hall 320 



On the efficacy of soluble fertilizer salts in dry climates, De Grazia 321 



Distribution of the manure values of foods between dung and urine, Crowther. 321 



Decomposition of manure and its action, Sjollema and De Ruijter de Wildt.. 321 



Experiments with green manures, Baessler 322 



The time between turning under green manure and sowing, De Grazia 322 



On the selection of plants for green manure, De Grazia 322 



Raw phosphate and green manure, De Grazia 323 



The cost of available nitrogen, Voorhees 323 



Tests of the fertilizing value of synthetic calcium nitrate, Passerini 323 



Facts regarding the natural changes in cyanamid nitrogen in the soil, Perotti. . 323 



The manufacture of nitric acid from the air, Haber 323 



The fixation of atmospheric nitrogen by the electric arc 323 



The great nitrate deposits of Chile 323 



[Production, exportation, and consumption of nitrate of soda in 1909], Otero. . . 323 



Experiments with different Thomas slags, Sjollema and De Ruijter de Wildt. . 323 



Basic slag as a fertilizer, Whitehouse 324 



After effects of certain phosphates on limed and unlimed land, Wheeler 324 



The mining of phosphate in Micronesia, Badermann 324 



Phosphate deposits of South Carolina and New Brunswick, Matthew 324 



An effect of drainage^ Bieler-Chatelan 324 



Field experiments with phonolite and its relation to plant diseases, Bromme. . 324 



Phonolite as a potash fertilizer in Sweden, Rhodin 325 



Determination of the physiological action of lime in vineyard soils, Treitz 325 



Lime for Virginia farms, Ellett 325 



[Jelly fish as a fertilizer], Carmody 325 



Report on disposal and use of mud from the harbor of Delfzijl, Lohnis et al 325 



Fertilizers, Hendrick 325 



[Soils and fertilizers], Voelcker 326 



Inspection and analyses of commercial fertilizers, season 1909-10, Hand et al.. 326 



Analyses of fertilizers — fall season 1909, Kilgore et al 326 



Analyses of licensed commercial fertilizers, 1910, WoU 326 



