LIST OF LITERATURE 171 



Pethybridge, G. H. (1936). Marsh spot in pea seeds: is it a deficiency 



disease? J . Minist. Agric. 43, 55-8. 

 Pettinger, N. A., Henderson, R. G. and Wingard, A. (1932). Some 



nutritional disorders in corn grown in sand cultures. Phytopathology, 



22, 33-51. 

 Pfeffer, W. (1900). The Physiology of Plants, vol. 1. English ed. 



Trans, and ed. by A. J. Ewart. Oxford. 

 Piper, C. S. (1940). Molybdenum as an essential element for plant 



growth. J. Aust. Inst. Agric. Sci. 6, 162-4. 

 Piper, C. S. (1941). Marsh spot of peas: a manganese deficiency disease. 



J. Agric. Sci. 31, 448-53. 

 Piper, C. S. (1942). Investigations on copper deficiency in plants. 



J. Agric. Sci. 32, 143-78. 

 Piper, C. S. (1942). Soil and Plant Analysis. Adelaide. 

 Pittman, H. A. (1936). Exanthema of Citrus, Japanese plums and apple 



trees in Western Australia. J. Dep. Agric. W. Aust. Second Ser. 13, 



187-93. 

 Pittman, H. A. and Owen, R. C. (1936). Anthracnose and mottle leaf 



of Citrus in Western Australia. J. Dep. Agric. W. Aust. Second Ser. 



13, 137-42. 

 Ptjgliese, A. (1913). Sulla biochimica del manganese; contributo alia 



conoscenza dei rapporti tra manganese en ferro in relazione alia 



vegetazione. Atti 1st. Sci. nat. Napoli, ser. 6, 10, 285-326. 

 Purvis, E. R. and Hanna, W. J. (1940). Vegetable crops affected by 



boron deficiency in eastern Virginia. Bull. Va Agric. Exp. Sta. 



no. 105. 

 Purvis, E. R. and Ruprecht, R. W. (1935). Borax as a fertilizer for 



celery. Amer. Fertilizer, 21 Sept. Cited from Dennis and O'Brien 



(1937). 

 Purvis, E. R. and Ruprecht, R. W. (1937). Cracked stem of celery 



caused by a boron deficiency in the soil. Bull. Fa Agric. Exp. Sta. 



no. 307. 



Raleigh, G. J. (1939). Evidence for the essentiality of silicon for 



growth of the beet plant. Plant Physiol. 14, 823-8. 

 Raulin, J. (1869). Etudes chimiques sur la vegetation. Ann. Sci. nat. 



Bot, 5 Ser. 11, 93-299. 

 Reed, H. S. (1938). Cytology of leaves affected with little-leaf. Amer. 



J. Bot. 25, 174-86. 

 Reed, H. S. (1939). The relation of copper and zinc salts to leaf structure. 



Amer. J. Bot. 26, 29-33. 

 Reed, H. S. (1941). Effects of zinc deficiency on cells of vegetative buds. 



Amer. J. Bot. 28, 10-17. 

 Reed, H. S. (1942). The relation of zinc to seed production. J. Agric. 



Res. 64, 635-44. 

 Reed, H. S. and Dufrenoy, J. (1933). Effets de l'affectation dite 



'mottle-leaf sur la structure cellulaire des Citrus. Rev. gen. bot. 



46, 33-44. 



