(line, 1940] Experiments With Potatoes 35 



(18) Odland, T. O., 1936. Crop Rotations for Potatoes. Ann. Rep. 

 xA.m. Veg. Growers' Assoc. 27 : 52-61 . 



(19) Salter, R. M. and Green, T. C., 1933. Factors Affecting the Ac- 

 cumulation and Loss of Nitrogen and Organic Carbon in Cropped 

 Soils. Jour. Am. Soc. Agron. 25 : 622-630. 



(20) Schultze, W., 1871. Uber die Kartoffelprobe mittelst Kochsalz- 

 losung Dingler's polytechnisches, Jour. 202. 86-88 (1871). 



(21) Shutt. Correlation between Specific Gravity, Total Solids and 

 Starch Content of Potatoes. Dept. of Agr. of Canada. Report of 

 Dom. Chemist, year ending March 31, 1925, page 65. 



(22) Smith, Ora. Effect of Soil Erosion on Growth. Yield and Market 

 Quality of Potatoes. Cornell Bull. 664, 1936. 



(23) Smith. Ora, 1938. Green Manure Crops for Potatoes. Am. Pot. 

 Jour. 15: 219-225. 



(24) Stauffer, R. S., 1936. Influence of Soil Management on some 

 Physical Properties of the Soil. Jour. Am. Soc. Agron. 28: 900- 

 906. 



(25) Thompson, H. C, et al. The Potato Situation and the Status of 

 Potato Research in N. Y. Cornell Exp. Sta. Bull. 352. June 

 1936. 



(26) Thorne. Charles E., 1926. The Function of Organic Matter in 

 the Soil. Jour. Am. Soc. Agron. 18: 767-793. 



(27) Turk. L. M. and Millar. C. E., 1936. The Effect of Different Plant 

 Materials, Lime and Fertilizers on the Accumulation of Soil Or- 

 ganic Matter. Jour. Am. Soc. Agron. 28: 310-324. 



(28) \'on Scheele, Svensson and Rasmusson (1937). Die Bestimmung 

 des Starkegehalts und der Trockensubstanz der Kartoffel mit Hilfe 

 des spezifischen Gewichts. Landwirt schaftlichen - Versuchs O 

 Stationen. 127:67-96. 



(29) Walton. A Comprehensive Survey of Starch Chemistry. \^ol L 

 The Chemical Catalog Co., Inc. (1928). 



(30) Watson. A Chemical Study of the Irish Potato. \^a. Agr. Exp. 

 Sta. Bull. 56 (1895). 



(31) Winton. Conn. Agr. Exp. Sta. Report. 1887, page 128. 



