94 Nebraska Agricultural Exp. Station, Research Bid. 13 
SCHOLZ, H. 
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SPRAGG, FRANK A. 
1910. Methods of Keeping Crop Records at Michigan Experiment 
Station. (Jour, of the American Society of Agronomy, Vol. 
II, pp. 43-55.) 
SMITH, LOUIS H. 
19 09. Plot Arrangement for Variety Experiments with Corn. 
(Jour, of the American Society of Agronomy, Vol. I, pp. 
84-89.) 
STOCKBERGER, W. W. 
1916. Relative Precision of Formulae for Calculating Normal 
Plot Yields. (Journal of the American Society of Agro- 
nomy, Vol. 8, pp. 167-175.) 
SURFACE, F. M., and PEARL R. 
1916. A Method for Correcting for Soil Heterogeneity in Variety 
Tests. (U. S. Department of Agriculture, Jour, of Agr. 
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TAYLOR, F. W. 
1908. The Size of Experiment Plots for Field Crops. (Jour, of 
the American Society of Agronomy, A^ol. I, pp. 5 6-58.) 
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19 08. The Interpretation of Field Experiments. (Jour, of the 
American Society of Agronomy, Vol. I, pp. 4 5-55.) 
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VINALL, H. N., and ROLAND, McKEE. 
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tion of These Factors to the Accuracy of Experimental Data. 
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Varieties and Selections. (Ztschr. Pflanzenzucht, 2, No. 2, 
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WHEELER, H. J. 
19 08. Some Desirable Precautions in Plat Experimentation Work. 
(Jour, of the American Society of Agronomy, Vol. I, pp. 
39-44.) 
