CIRCULAE NO. 127, BUREAU OP PLANT INDUSTRY. 



During the growing season a count was made of the actual stand 

 on the plats, and during the latter part of September a count was 

 made of the wilted plants. In tabulating the results of these counts 

 the percentage of stand was determined by computing the percentage 



Fig. 1.— Diagram showing llie fields used in llie experiments with ^potatoes |at the Delta Experiment 



Farm in 1912. . 



of a perfect stand, estimated by the distance between rows and hills 

 on each plat; the potatoes having boon planted at the usual dis- 

 tances as described above, a stand of 20,500 })lants per acre was taken 

 as 100 per cent. The ])ercentage of wilt was computed as the ratio 

 between the wilted plants and the actual stand. 



[Cir. V27] 



