570 



INDEX 



Cotton (continued) 



species, laboratory exercises, 281. 



species, literature, 281. 



stalk cutter, 399. 



stalks, loss in burning, 406. 



statistics, laboratory exercises, 

 387. 



stems and branches, 248. 



stems, plant food ic, 271. 



stems, weight of, 271. 



"storm resistance," 261. 



structure and general character- 

 istics, 248. 



structure, laboratory exercises, 

 265. 



structure, literature, 266. 



subsoiling for, 344. 



tillage by weeder and harrow, 350. 



time of planting, 347. 



time of plowing for, 342. 



tinges and stains, 374. 



Toole variety, 296, 297. 



Triumph variety, 298. 



Truitt variety, 298. 



twist in fibers, 262. 



upland species, 276. 



variation and selection, 303. 



varieties, 282. 



varieties, laboratory exercises, 

 299. 



varieties, literature, 299. 



vegetative branches, 249, 250. 



where potash is needed, 318. 



wilt, description of, 412. 



wilt, persistence of, 413. 



wilt-resistant varieties, 414. 



wilt, spread of, 412. 



wilt, treatment of, 413. 



young plants of, 353. 

 Cowpeas, in corn, 181. 



drilling versus broadcast sowing, 

 181. 



fertilizer for, 184. 



methods of drilling, 184. 



methods of sowing broadcast, 

 183. 



Cross-breeding, effects of, in corn, 



141. 



in corn, 140. 



"Crossed corn." See page 180. 

 Crossing versus selection in cotton, 



301. 



Crossley, B. W., 205, 216. 

 Current cross, 127. 

 Cutworms, 207. 

 Cylas formicarius, 452. 



Davenport, E., 149. 



Davidson, R. J., 547. 



Dewey, L. H., 281, 424. 



Diabrotica 12-punctata, 206. 



Diatrea saccharalis, 520. 



Dioscorea, 431. 



Diplodia, 215. 



Diplosis sorghicola, 233. 



Disk-harrow, 16. 



for forming beds, 347. 



Dodlinger, P. T., 67. 



Dodson, W. R., 157, 230, 247. 



Dolochonyx oryzivorus, 229. 



Dominance of qualities in hy- 

 brids, 143. 



Double fertilization, 90. 

 in corn, 142. 



Drake, Z. J., yield of corn, 204. 



Drilling versus broadcast sowing of 

 wheat, 54. 



Duggar, B. M., 456. 



Duggar, J. F., 31, 126, 157, 188, 

 205, 299, 340, 360, 455. 



Earle, D. E., 376. 

 Earle, F. S., 521. 

 Ear-to-row system of corn breed- 



ing, 133. 



East, E. M., 143, 149. 

 Einkorn, 40. 

 Elliott, E. E., 67. 

 Embryo-sac, 90. 

 Emmer, 40. 

 Endosperm, 90. 



