INDEX 



831 



Types for seed, undesirable, 203. 

 ' — production of new, 230. 



Unit-characters, 164, 170, 173. 

 United States, amount and value of 

 crop, 5. 



— — distribution in, 48. 



— — elevators in, .611. 



— — not grown for export, 5. 



— — leading product of, 4. 



Upper Bush-veld, breeds suitable for, 



333- 



Use of maize in Tropical Africa, 676. 

 Uses of maize crop, 782. 

 Ustilago Maydis, 212. 



Value, farm, of maize, 2. 



— food, see Food value. 

 Valve, 95. 



Variation in shape of, 120, 121. 

 Varieties, influence of climate, 44. 



— of maize, see heading Breeds. 

 Vascular bundles, 76, 77. 

 Vegetative nucleus, 99. 

 Vereeniging, temperatures at, 32. 

 Vernacular names, 19. 

 Vinegar, maize, 696. 



Vitality of pollen, 101. 



— ■ of seed, 72. 



Volunteer maize plants, 418. 



Water, 652. 

 Weather, effect of, 38, 39. 

 Weeding implements, 400. 

 Weeds, 416, 417. 



— food value of, 737. 



— germination of seeds, 422. 



— parasitic, 416. 



— perennial, 417. 



— spreading of, 41S. 



— time for killing, 422. 

 Weevils, 494. 



Weight and bulk of South African 

 maize, 622. 



— of grain per ear, need for increase, 



I 37- 



— percentage by, of grain and cob, 148. 



West Indies, 50. 



Western Province, 64. 



Wet maize, conditioning, 598. 



Whisky, 53, 700. 



White rust or blight, 409. 



White starch, 662. 



White starchy endosperm, 188. 



Wild state, not known, II. 



Winter-feed, loss of stock from lack of, 



732- 



Winter frosts, 32. 

 Winter use, dried maize for, 691. 

 Wisconsin, analysis of yields of, 144. 

 Witch-weed, or Rooibloem, 423. 

 World's crop, r, g, 47, 517. 



Xenia, 175, 178, 179. 

 Xylem, 77. 



Yellow endosperm, 187. 



— foliage, 415. 



Yield, analysis of, 138-145. 



— cause of poor, 130. 



— comparative of Dent and Flint 



breeds, 280. 



— effect of depth of grain on, 149. 



— — of shape of grain on, 151. 

 of width of sulci on, 151. 



— improvement of, 213. 



— increased by rows of butt and tip, 



151. 



— influence of maturity upon, 457. 



— of different breeds in Transvaal, 



333- 



— of dry fodder, 736. 



— of grain from a given measure of 



ears, 492. 



— of grain of Transvaal maize, 146. 



— of grain per ear, 117, 254. 



— per acre, American breeders' im- 



provement of, 129. 



— per acre at various weights per ear, 



147- 



— per acre, need for increase, 128. 



— relative, at Cedara, 340. 



— relative, at Potchefstroom, 335. 



— variation in, 159. 

 Yster-vark, 433. 



Zea, 16, 65. 



— canina, 277. 



— Mays, 16. 



var. erythrolepis (Bonaf.) Alef., 



278. 

 var. indentata (Sturt.) Bailey, 



277. 

 var. indurata (Sturt.) Bailey, 



277. 



var. precox (Bonaf.), 276. 



var. rugosa (Bonaf.), 279. 



— — var. tunicata St. Hil., 275. 



— or maize silk, 801. 

 Zein, 649. 



Zone, Rocky Mountain, 49. 

 Zone, sub-arid, 49. 

 Zygote, 163. 



ABERDEEN : THE UNIVERSITY PRESS 



