INDEX. 



Agave spp., feeding to range stock, description and value 728< 



16-17 

 13-14 



Bulletin 



No. la &> 

 7,8,9 

 13,15 



Agriculture Department, scope, remarks of President 732 48 



Alfalfa— 



f 79fl 



" crowning' ' in preparation of land for sugar beets < ™r 



feed value, comparison with soap weed, sotol, etc 728 15-18 



land, value for cotton growing 742 21-22 



rotation crop in sugar-beet growing 726 12 



Alfilaria, value for goat grazing. . '. 749 4 



Amole. See Soap weed. 



Anaphoidea conotracheli, parasite of grape curculio 730 14 



Angora goats, shearing practices 749 17-18 



Anthracnose — ■ 



cucurbit, casual organism, life history, spread, etc 727 12-58 



history and geographic distribution 727 3-8 



spread by water and other agencies 727 34-58 



wintering over 727 56-58 



disease of cucurbits, bulletin by M. W. Gardner 727 1-68 



economic importance 727 8-10 



fungi, varieties 727 24 



hosts, history, distribution and description 727 2-11 



watermelon, spread by cultural practices 727 43-44 



Ants, species, feeding on grape curculio, list — 730 13-14 



Aphis, woolly apple, control of root form, experiments 730 29-40 



Aplestomorpha spp., parasitic enemies of tobacco beetle 737 35-36 



Apple, aphis, woolly, control experiments 730 29-40 



Apples, storage, handling temperature, inspection, etc 729 3^1 



Arid lands — 



Colorado, farm practice in sugar-beet growing 726 7-8 



desert plants as emergency stock feed 728 4-27 



Arizona — 



cotton — 5-11, 



growing conditions, introduction, progress, etc 742 { 15-16, 21 



[ 24-27 



production, 1916 and 1917 733 5, 7-85 



range stock, emergency feeding on desert plants 728 1-27 



Sacaton testing garden, work on Egyptian cotton 742 11 



Arkansas, cotton production, 1916 and 1917 733 7-8 



Arsenate, calcium, preparation of commercial grade, bulletin by J. K. 



Haywood and 0. M. Smith 750 1-10 



Arsenic oxid, proportion to lime in making calcium arsenate 750 4-7 



Arsenicals, use on cotton boll weevils, effectiveness and strength 731 11-12 



Aspen — 



injury by live stock 74l| ^^y 



reproduction, effect of grazing, bulletin by Arthur W. Sampson. 741 1-29 



silvicultural management, cutting, and brush disposal methods. 741 23-25, 27 



sprouts, injuries by sheep and cattle in grazing, comparison 741 16-17, 26 



stands, cutting, thinning, brush disposal, etc 741 23-25 



uses and value 741 1-2 



value as protective cover for watershed, note 741 1 



Aspens, growth rate in reproduction 741 21-23, 27 



Attagenus piceus, injury to tobacco 737 30 



27422°— 21 2 1 



