GENERAL INDEX 



237 



Sandwort, 31, 129, 130. 



thyme-leaved, 85, 156, 168, 174, 208. 

 Scabiosa arvensis. See Scabious. 



S. succisa, 222. 



Scabious, 124, 148, 158, 171, 179, 222. 



Scale leaves, 32. 



Scandix pecten. See Shepherd's 



Needle. 



Scarce weeds, 122. 

 Scleranthus annuus. See Annual 



Knawel. 



Scour, 107, 193. 

 Scrambling weeds, 89. 

 Sedge, 178, 179, 190, 210. 

 Seed production, abundant, 18, 77, 84. 



Testing Station, 44. 

 Seedlings, destruction of, 3. 



" Seeds " crops, 6, 132, 161-74. 



Selfheal, 129, 181, 220. 



Senebiera coronopus. See Swine-cress. 



Senecio Jacob cea. See Ragwort. 



S. vulgaris. See Groundsel. 



Serradella, 55, 58. 



Serratula tinctoria, 223. 



Sexual reproduction, 18. 



Sheep, 107, 108, no, in, 116, 186, 

 187-205. 



Sheep's sorrel, 4, 18, 28, 36, 44, 49, 62, 

 68, 69, 74, 104, in, 118, 119, 120, 

 141, 143, 144 (fig.), 151, 153, 154, 

 158, 162, 163, 174, 179, 223. 



Shepherd's needle, 25, 28 (fig.), 50, 

 87, 126, 127, 153, 155, 158, 165, 

 173, 223. 



purse, 4, 16, 17, 20, 85, 88, no, 



112, 126, 127, 156, 162, 163, 164, 



183, 2IO. 



Sheradia arvensis. See Field Madder. 



Silage crops, 50. 



Silene anglica, 223. 



S. inflata. See Bladder Campion. 



S. noctiflora, 223. 



Silverweed, 16, 38, 88, 104, 126, 128, 



151, 158, 171, 179, 183, 184 (fig.), 197, 



220. 



Sisymbrium officinale, 129, 223. 

 Smother crops, 50, 51, 159, 166, 170. 

 Sodium arsenite, 59, 67, 96. 



bisulphate, 60. 

 nitrate, 96. 



Soils, classification, 122. 



Solanum dulcamara, 31, 223. 



S. nigrtim, 31, 95, in, 224. 



Somme battlefield, 76. 



Sonchus arvensis. See Corn Sow- 

 thistle. 



S. oleraceus. See Sowthistle. 



Sorrel, 21, 36 (fig.), 38, 68, 104, 118, 

 119, 178, 179, 182, 185, 186, 188, 199, 

 222. See also Rumex acetosa. 



Sour land, 141. 



Sowthistle, 23, 62, 70, 95, 201, 224. 



corn, 9, 18, 33 (fig.), 36, 48, 136, 



I 5 I t 158, 162, 163, 164, 224. 

 Speedwell, 19, 31, 62, 87. 



field, 16, 17, 81, 82, 122, 126, 127, 



J 39, 158, 162, 163, 164, 173, 225. 



germander, 181, 225. 



ivy-leaved, 82, 85, 131, 158, 169, 



225. 



large field, 136, 139, 158, 169, 170, 



225. 



thyme-leaved, 150, 158, 183, 225. 



wall, 131, 158, 168, 172, 174, 225. 

 Spergula arvensis, 154. See also 



Spurry. 



Spirceajilipendula, 224. 

 S. ulmaria. See Meadowsweet. 

 ' Splits," 125. 

 Spraying, time of, 56. 

 Sprays, 9, 54, 55, 59, 66, 67, 96. 

 Spurge, 20, 85, 87, 104, in, 213. 

 dwarf, 16, 136, 138, 156, 165, 213. 

 See also Euphorbia exigua. 



petty, 126, 128, 156, 213. 



sun, 129, 130, 156, 171, 174, 187, 



213. 



Spurry, 4, 16, 19, 21, 22 (fig.), 31, 56, 

 62, 85, 87, 117, 120, 123, 141, 142 

 (fig.), 151, 153, 158, 160, 169, 170, 

 173, 174, 201, 224. See also Spergula 

 arvensis. 



Stocky s arvensis, in, 224. 



S. betonica, 224. 



S. palustris, 224. 



Stagger weed, in. 



Star-of-Bethlehem, spiked, 38, 196. 

 See also Ornithogalum pyrenaicum. 



Stellar ia graminea, 224. 



S. media, 130, 191. See also Chick- 

 weed. 



Stinkweed, 115. See also Thlaspi 

 arvense. 



Stitchwort, 187. 



Stork's-bill, 20, 213. 



Storm columns, weeds distributed by, 



Struggle for existence, 120. 

 Suceda fruticosa, 118. 

 S. maritima, 118. 

 Sub-dominant weeds, 122. 

 Sulphate, ammonium, 69. 

 - copper, 55, 56, 57, 59, 67. 



iron, 55, 57, 58, 59, 61, 67, 96. 



nickel, 59, 60. 

 Sulphuric acid, 55, 58, 60, 67. 

 Superphosphate, 69. 

 Survey, weed, 121. 



Swine-cress, 16, 87, 136, 137, 158, 183, 

 223. 



