V 



INDEX. 



Page, 



Abutilon, determinatioiis of wilting coefficient 27, 28, 32, 37 



Accuracy, comparative, of different methods for determining wilting coeffi- 

 cient 14-16, 71-72 



Acorus calamus, comparison with wheat by simultaneous culture 46 



Adiantum pedatum, comparison with wheat by simultaneous culture 45, 46 



Aeration, method when wax seal is used : 12 



Age of plants, effect on wilting coefficient 19-22 



Agropyron spp., determinations of wilting coefficient 21, 36, 43 



Akron, Colo., determinations of soil moisture 61 



Alfalfa, determinations of wilting coefficient 29, 31, 36, 44 



Allium cepa, comparison with wheat by simultaneous culture 46 



Alway, F. J., on moisture content of soils 6Q 



Amaranthus retroflexus, determinations of wilting coefficient 37, 46 



Analysis, mechanical, use in determining wilting coefficient 68-72, 76 



Apparatus, use in determining wilting coefficient 12-13, 47-53, 57, 64 



See also separate items of apparatus, as, Balance, Pots, etc. 



Aristida longiseta, determinations of wilting coefficient 21, 36, 44 



Artemisia gnaphalodes, determinations of wilting coefficient 37, 46 



Available moisture. See Moisture, available. 



Balance, use in determining wilting coefficient 8, 9, 47-53, 74, 76 



Balancing method of determining wilting coefficient. See Balance. 



Bamboo, comparison with wheat by simultaneous culture 46 



Barley, determinations of wilting coefficient 22, 26-29, 31, 32, 35-38, 42, 66, 75 



Beeswax, use in determining wilting coefficient 13-14, 49 



See also Wax. 



Beet, sugar, determinations of wilting coefficient 37, 45 



Belief ourche, S. Dak., source of soil samples used in experiments 59 



Bergen, J. Y., on transpiration in seedlings 22 



Bouteloua oligostachya, determinations of wilting coefficient 36, 44 



Briggs, L. J., and McLane, J. W., on moisture equivalent of soils 56, 68, 72 



Shantz, H. L., on wax-seal method 18 



Martin, 0. F.. and Pearce, J. R., on the mechanical analyses of 

 soils 68 



on the moisture-holding capacity of soils 67 



Bromus inermis, determinations of wilting coefficient 21, 36, 43 



Buckwheat, determinations of wilting coefficient 33, 37 



Cactus, determinations of wilting coefficient 47, 48, 51-53, 76 



Calcium carbonate, use in promoting growth of seeds 11 



Cameron, F. K., and Gallagher, F. E., on Heinrich's hygroscopic moisture de- 

 terminations 66 



Canada field pea. See Pea, Canada field. 



Chaetochloa italica, determinations of wilting coefficient 36, 40 



Chamber, damp, use in determining wilting coefficient 13, 22, 23, 75 



Cheesecloth, experimental use in determining wilting coefficient 23-24 



230 79 



