RESISTANCE OF PLANTS 389 



LooMis, W. E. A quantitative demonstration of osmotic equilibrium. 



Plant Physiol, 6: 3G5-367, 1931. 

 Martin, J. H. The comparative drought resistance of sorghums and corn. 



Jour. Am. Soc. Agron., 22: 993-1003, 1930. 

 M.\xiMOV, N. A., and T. A. Krasnosselsky-M.\ximov. Wilting of plants 



in its connection with drought resistance. Jour. Ecology, 12: 95-110, 



1924. 

 Meinzer, O. E. Plants as indicators of ground water. U. S. Geol. Surv. 



Water Supply Papers. 577: 1-95, 1927. 

 MoLz, F. J. A study of suction force by the simplified method. I. Effect 



of external factors. Am. Jour. Botany, 13: 433-463, 1926. 

 . A study of suction force by the simplified method. II. Periodic 



variations and the influence of habitat. Am. Jour. Botany, 13: 465- 



501, 1926. 

 Newton, R., and W. M. Martin. Physico-chemical studies on the nature 



of drought resistance in crop plants. Can. Jour. Res., 3 : 336-383, 1930. 

 and . Physico-chemical studies on the nature of drought 



resistance in crop plants. VI. Properties of plant-tissue fluids in rela- 

 tion to drought resistance. Can. Jour. Res., 3: 385-427, 1930. 

 Oppenheimer, H. R. Kritische Betrachtungen zu den Saugkraftmes- 



sungen von Ursprung und Blum. Ber. botan. Ges., 48: 130-140, 1930. 

 Otis, C. H. The Askenasy demonstration. Plant Physiol., 5: 419-423, 



1930. 

 OvERHOLSER, E. L., F. L. OvERLEY, and L. L. Claypool. Cork or drought 



spot in apples or pears. Better Fruit, 27: 5-6, 1933. 

 Pfeffer, W. "Osmotische Untersuchungen." Leipzig. 1887. Landw. 



Jahrh., Bd. V: 1-125, 1876. 

 ruLLiNG, H. E. How plants fight drought. Sci. Monthly, 41: 176-179, 



1935. 

 Renner, O. Wasserzustand und Saugkraft. Planta {Arch. wiss. Botanik), 



19: 644-647, 1933. 

 Richards, L. A. The usefulness of capillary potential to soil-moisture and 



plant investigators. Jowr. Agr. Res., 37: 719-742, 1928. 

 Rogers, W. S. A soil moisture meter depending on the "capillary pull" 



of the soil. With illustrations of its use in fallow land, grass orchard, 



and irrigated orchards. Jour. Agr. Sci., 25: 326-343, 1925. 

 Russel, J. C. Making the most of rainfall through soil and crop manage- 

 ment (in 2%th Annual Rept. Neb. Crop Growers' Assoc, 1935). Annu-al 



Rept. Neb. State Board Agr. 1935. 199-206, 1935. 

 Sayre, J. D., and V. H. Morris. Use of expressed sap in determining the 



composition of corn tissue. Plant Physiol., 7: 261-272, 1932. 

 Shantz, H. L. Drought resistance and soil moisture. Ecology, 8 : 145-147, 



1927. 

 Shirley, H. L. A method for studying drought resistance in plants. 



Science, 79: 14-16, 1934. 

 . Observations on drought injury in Minnesota forests. Ecology, 



15: 42-48, 1934. 

 Shreve, E. B. Seasonal changes in the water relations of desert plants. 



Ecology, 4: 266-292, 1923. 



