390 



SUBJECT INDEX 



Patschcrkofel, sub-alpine plants — water 



content, 165 

 Pea, 67, 71-78 



cropping pattern, 360, 361, 363, 364 



growth and radiation, 250 



growth of seedHngs, 201-202, 203 



Peanuts, transpiration, 302 



Peat, in Scotland, 13, 14 



Pecan, growth and flooding, 372 



Pelargoiiiiiin, stomatal behaviour, 173 



water movements in leaf, 90-93 



Pennsylvania, growth of trees and 



drought, 372 

 PhaseoUis nitmgo, salt content and yield, 



286 

 Photometer, 169-170 

 Photosynthesis and growth of poplar, 



257-270 



hydration of leaf tissue, 225-233 



radiation, 250 



stomatal closure, 225 



Picva abies, crop failure in Finland, 372 



dieback and drought, 372 



growth, 257 



growth in Denmark, 142-152 



throughfall beneath, 127 



Picea excelsa, injury delay and drought 



stress, 165 

 precipitation in stand, 1 1 5- 



125 



sub-lethal water content, 165 



Picea glatica, resistance to flooding, 371 

 Picea inariana, distribution in North 



America, 368 



Ontario, 367-378 



Picea sitchemis, dieback and drought, 372 



throughfall beneath, 131 



Pimpitiella saxifraga, growth, 210 



Pine, drought and growth, 372 



soil water depletion in Arkansas, 



374 



(see also under Piiitts) 

 Pineapple, 54 



Pinus, absorption of dew, 54 

 Piiius banksiana, distribution in Ontario, 



367-368 

 Pinus cembra, injury delay and drought 



stress, 165 



Pinus cembra, osmotic value of needles, 



163 

 snow cover and water bal- 

 ance, 162-166 



temperature of needles, 156 



Pinus coultcri, survival value of dew, 367 



water vapour uptake, 52 



Pi}uis (iciisifiora, growth, 322 

 Pintis cchiiiata, radial growth, 369 



water vapour uptake, 52 



Piinis halepcnsis, average saturation defi 



cit, 53-54 

 Pinus palustris, ring width, 369 

 Pinus potiderosa, survival value of dew, 



367 

 Pinus resinosa, resistance to flooding, 371 



throughfall beneath, 128 



Pinus strobus, shade effect, 368 



transpiration, 122 



Pitnis sylvestris, competition for moisture, 



368 



crop failure in Finland, 372 



growth, 257, 281, 283, 293 



leaching in podsol beneath. 



129 



transpiration, 122, 302 

 water consumption, 124, 187 

 water uptake by dwarf shoots, 



102 

 Pinus taeda, in Piedmont plateau, 368 



transpiration, 370 



utihzation of soil water by 



seedlings, 369-370 

 Piswn sativum, 67, 71-78 

 Pituranthus torttiosus, root penetration, 



204 

 Poplar, photosynthesis and growth, 



257-270 

 Populus angulata, growth, 370 

 Popnlus candicans, water movements in 



leaf, 90-93 

 Potatoes, cropping pattern, 356, 359, 



360, 361, 362, 363, 364 

 osmotic values and yield, 275, 



276, 278, 283 

 water lack, 282-283 



Potential evaporation, 10, 11, 12, 16 

 • measurement, lo-ii 



