SUBJECT INDEX 



393 



Tamarack, distribution in North 



America, 368 

 Temperature, of pine needles, 155, 156, 



161 



of soil beneath snow, 161, 162 



of spruce needles, 145-147 



measurement, 145 



Temperature gradients in soil, 65-82 

 Teucrium chamaedrys, transpiration, 184 

 Teucrium polimti, 207 



hfe cycle, 208-209, 210 



seasonal body reduction, 215 



transpiration, 217, 218 



weight of transpiring body, 



214, 216 

 Thelycrania sanguinea, 289 



drought resistance, 302-308 



growth, 290-296, 298, 309, 



310 



transpiration, 296-302, 303, 



309 



Theodosia (Crimea) large heaps of 



stones as dew collectors, 45 

 Thermocouples, wet and dry bulb, 25, 26 

 Throughfall, in forests, 127-140 



measurement, 131, 136 



Thymus capitatus, 207 



hfe cycle, 208, 209 



seasonal body reduction, 215 



transpiration, 217, 218 



Weight of transpiring body, 



214, 216 

 Tilia cordata, killed by flooding, 372 

 Tobacco, photosynthesis and respiration, 



226-233 



stomatal size, 228, 230, 231 



Tomato, irrigation and growth, 340, 352 



osmotic values and yield, 275, 276 



salt content and yield, 286 



water movements in roots, 94 



Transpiration, 31-32, 85-99 



measurement in detached leaves, 



170 



in psammophytes, 191 



Trifolium incarnatum, growth, 202-204 

 Tsuga canadensis, throughfall, 128 

 Turgor pressure, 273 

 Turkey, 3. 4. 7. 8 



Turnip, osmotic value, 280 



osmotic value and yield, 277, 283 



water lack, 282-283 



Tyrol, cUmate, 154 



U.S.S.R. dewfall, 43 



Vaccinietum, distribution in relation to 



snow cover in Alps, 160 

 Vaccinium vitis-idaea, transpiration, 186 

 Vegetation regions, in relation to 



climatic types, 8 

 Verbascum thrapsus, 174 

 Viviafaha, stomatal closure, 187 

 Victoria (AustraUa) dew, 50 

 Vietnam, condensation, 79 

 Viola hirta, transpiration, 183 

 Von Karaman's constant, 20 



Wales, potential water deficit, 15, 16 

 Water absorption, 153 



by spruce at low temperatures, 162 



Water consumption, Pinus, 124 



by spruce trees in relation to 



precipitation, 123-125 

 Water content of soil, Braunton 



Burrows, 175-176 

 Water deficit, estimation in leaves, 170 

 Water loss, reduction, 153 

 Water movements, effect of dissolved 



salts, 57-64 

 Water movements in roots and leaves, 



85-99 

 Water potential of soil, 57-58 

 Water saturation deficit, in leaves, loi- 



III 

 Water use and growth, 251-256 

 Water vapour, absorption by plants, 



50-53 



movement in soil, 65-82 



Wheat, cropping pattern, 360, 361 



osmotic value, 275 



and yield, 276, 284 



salt content and yield, 286 



transpiration, 121 



Willow, 182 



growth and flooding, 372 



