19171 CONTENTS. HI 



AGRICULTURAL B OTA NT. 



Page. 



Plant physiology as horticultural theory, Molisch 220 



Applied and economic botany, Kraemer 220 



Canaigre, a quick-growing tannin plant for acclimatization in France, Piedallu. 220 



New names m Amygdalus, Ricker 220 



Studios in the nomenclatvu'e and classification of bacteria , Buchanan 220 



Note on the classification of some lactose-fermenting bacteria, Levine 220 



The preparation of culture media from whole blood, Kelser 220 



The development of Azotobacter, Cauda 221 



The oxygen requirements of biological soil processes, Murray 221 



Depression of freezing point in triturated tissues, Hibbard and Harrington 221 



C landular hairs on roots, Haberlandt 222 



Absorption of nutrients as affected by nimiber of roots, Gile and Carrero 222 



The excretion of acids by roots, Haas 222 



Leaf epidermis and light perception, Haberlandt 222 



Chemical organization of the assimilatory apparatus, Willstatter and Stoll 222 



Assimilation of organic nitrogen by Zea mays, Brigham 223 



Catalytic action of potassium nitrate in alcoholic fermentation, MolUard 223 



Stimulation and injury to plants by acids, Onodera 224 



Frost and alterations in leaves of trees, Arnaud 224 



Effect of environmental conditions on tobacco plants, AUard 224 



The shedding of flower buds in cotton, Harland 224 



On the genetics of crinkled dwarf rogues in Sea Island cotton, 1, Harland 224 



Partial sterility of Nicotiana hybrids, II, Goodspeed and Ayres 225 



Partial sterility of Nicotiana hybrids, III, Goodspeed and Kendall 225 



FIELD CROPS. 



Report of field crops work at the Minnesota Station] 226 



Report of field crops work at the Crookston substation] 220, 228 



Report of field crops work at the Duluth substation] 228 



Report of field crops work at the Grand Rapids substation] 228 



Report of field crops work at the Morris substation] 229 



The Woburn field experiments, 1915], Voelcker 229 



Cultivation and utilization of sunflower, niger, and safBower seed 230 



Pasture problems, Stapledon and Jenkin 230 



Observations on alfalfa, Jenkins 231 



Beans in Colorado, Kezer 232 



Clover and clover hay, Howard 232 



Corn problems. — Varieties; time, manner, and rate of planting, Gearhart 232 



How much plant food does a corn crop take from an acre? Jenkins et al 233 



Com variety tests for 1915, Winters, Garren, and White 233 



Egyptian maize {Zea mays), Dudgeon and Holland 233 



Fique {Furcrxa gigantea) 233 



Culture and manufacture of flax for fiber and seed in Oregon, Thome 233 



Indian hemp fiber {Crotalaria juncea), D'Lima 233 



[The composition of mangels], Gimingham 233 



Great millet (Sorghum vulgare) and berseem ( Tri/olium alexandrinum), Bolland 233 



Peanuts. — Tests of varieties and fertilizers, Duggar et al 233 



Growing peanuts in Alabama, Duggar et al 234 



A note on the inheritance of certain stem characters in sorghum, Hilson 234 



Tests of soy beans in 1916, Jenkins, Street, and Hubbell 234 



Soy beans. — Their culture and use, WiUiams and Park 235 



Sudan grass, Madson and Kennedy 236 



Report of the plant breeder, Cowgill 236 



The value of crop rotation in practical cane culture, Rosenfeld 237 



Some sugar-cane experiments in Travancore, Pillai 237 



Washington wheats. — Their classification and identification, Al vord 237 



The wheat field in April . — Top-dressing with fertilizers, Thorne 238 



The saving of irrigation water in wheat growing, Howard 238 



Third annual report of the State grain laboratory of Montana, Atkinson et al... 238 



Results of seed inspection, 1915 and 1916, Helyar et al 239 



Weeds in the Government of Novgorod, Malzew 239 



Broom rape 239 



Red sorrel and its control (Rumex acetosella), Pipal 239 



