INDEX. 39 



Page. 



Moisture, conservation in soil . . i 8, 9, 11, 12, 33 



Oats, drought-resistant varieties 8 



Office of Dry-Land Agriculture. See Cooperation. 



Forage-Crop Investigations. See Cooperation. 

 Grain Investigations. See Crops, comparative tests. 

 Western Agricultural Extension. See Cooperation. 



Peas, Canada, breeding experiments 32 



grass, breeding experiments 32 



Phleum pratense. See Timothy. 

 Pierre shale formation. See Gumbo. 

 Plant breeding. See Breeding. 



Planting, alfalfa, method used for maximum seed yield 19-20, 33, 36 



Plants, characters required for semiarid region 7-9, 16, 22 



Plates, description . . . „ '. 36 



Pollination of alfalfa 16 



sorgo 21 



Precipitation. See Rainfall. 



Prices of alfalfa and western wheat-grass hay 30 



Rainfall, factor in plant breeding 9, 11-13, 28 



Range, character of industry 8 



Reclamation Service. See Cooperation. 



Screens, proposed use to insure self-pollination 16 



Seed, distribution of superior strains 19, 21, 23, 24, 34 



production. See Grain. 



Selection, factors governing method in plant breeding 8-9, 23 



Shepard, J. H., on analyses of forage plants 30 



Shrinkage of soil in drying, effect on plants 11 



Siberia, origin of Agropyron cristatum 32 



Slender wheat-grass. See Grass, wheat. 



Soils, factor in plant-breeding work 11, 12, 21, 30, 32 



Sorghum, tests for drought resistance 9-10 



Sorgo, breeding for drought resistance 7-8, 9, 10, 20-23, 33, 36 



varieties, Montana, origin 21 



Orange, proposed culture at Akron, Colo 23 



Red Amber, proposed culture at Akron, Colo 23 



South Dakota No. 341, character and breeding 21-22, 36 



South Dakota Agricultural Experiment Station. See Cooperation. 



Sowing, broadcast, alfalfa, comparative yield 19-20 



Kursk millet, results 29 



Stations, dry-land, as located, representative of Great Plains conditions. . 7, 10-12, 33 

 experiment. See Cooperation and Experiments. 



Stock, live, chief industry of Great Plains area 8 



Summary of bulletin 33-34 



Temperature, factor of plant breeding 11, 18-19 



Timothy, chemical analysis 30 



Turkestan, source of plant introductions 13, 14, 25 



Uniformity, factor in plant breeding 16, 21, 22-23, 27, 33, 36 



Varieties, tests of drought-resistant plants 7-9, 10 



See also Alfalfa, Millet, Sorgo, etc. 



Vetches, breeding experiments 32 



Western wheat-grass. See Grass, wheat. 



Westgate, M., J. on alfalfa growing 14, 19 



196 



