INDEX 



347 



P(}tassium (continued). 



amount in barnyard manure, 333. 



amount in corn, 331. 



amount in oats, 331. 



amount in timothy, 331. 



amount in wheat, 331. 



commercial fertilizers contain- 

 ing, 335. 



how restored to soil, 335. 

 Potatoes, how grown, 319. 



sweet, how grown, 324. 

 Propagation, by budding, 142. 



by bulbs, 136. 



by grafting, 139. 



by layers, 135. 



by runners, 134. 



by seeds, 133. 



by spores, 124. 



by suckers, 135. 



by tip layers, 135. 

 Protein, in legumes, 242. 



effect of feeding, 120. 

 Pruning, methods of, 299. 



why necessary, 298. 



precautions necessary, 304. 

 Pumpkins, how grown, 327. 



Rabbits, prevention of injury by, 



305. 

 Radicle defined, 62. 

 Radishes, how grown, 321. 

 Raspberry, age of bearing wood, 297. 



how pruned, 301. 



methods of cultivation, 291. 

 Redtop, advantages of, 233. 



disadvantages of, 233. 



range and character of, 232. 

 Rice, how cared for, 223. 



how harvested, 223. 



how planted, 223. 



how prepared for use, 223. 



production of, in U. S., 222. 



seed bed for, 222. 



soil requirements of, 222. 



uses of, 224. 

 Root hairs, origin of, 81. 

 Roots, absorbing, 80. 



anchorage, 80. 



anchorage, origin of, 81. 



benefits of, 88. 



functions of, 77. 



food stored by, 87. 



how minerals are dissolved by, 79. 



how tips are protected, 82. 



of dicotyledons, 84. 



of monocotyledons, 83. 



rapidity of growth in early 

 stages, 76. 



region of growth, 82. 



why moisture enters, 77. 

 Rotation, benefits of, 29, 85. 



defined, 206. 



that is often recommended, 206. 

 Rye, soil requirements of, 221. 



uses of, 221. 



Sands, shifting of, 85. 

 Sappiness defined, 156. 

 Seed analysis, 261. 

 Seed bed for barley, 221. 



for corn, 181. 



for corn, how prepared, 182. . 



for oats, 215. 



for rice, 222. 



for wheat, 207. 



for wheat, how prepared, 206. 

 Seed collection, how made, 50. 



defined, 62. 



functions of, 46. 

 Seedling, defined, 75. 



vigor of, how determined, 74, 76. 

 Seeds, effect of moisture upon, 59. 



enemies of, 46. 



explosive or creeping, 48. 



first factors determining vitality 

 of, 60. 



how scattered by man, 49. 



how scattered by nature, 46. 



how scattered by animals, 48. 



how scattered by water, 47. 



how scattered by wind, 47. 



selection of, by man, 52. 



selection of, by nature, 52. 



size of, effect on seedlings, 73. 



storage of, by man, 58. 

 Self-fertilization defined, 113. 

 Sepals defined, 108. 

 Shocking oats, methods of, 218. 

 Sieve tubes, 103. 

 Silt, 4. 

 Soil acidity, effect on clovers, 252. 



test for, 254. 



