FIELD CROPS. 435 



tions under which these oats were grown the small- or medium-seeded strains 

 are the more desirable. 



" These studies indicate, further, that the varieties tending to produce large 

 quantities of straw give, on the other hand, a large quantity of hull and a 

 comparatively small quantity of meat. The correlation between pei'centage of 

 meat and yield of straw for the varieties grown in 1913 gave a correlation co- 

 efficient of — 0.621±0.035, showing that as the yield of straw increased there 

 was a decrease in percentage of meat. The correlation between length of 

 kernel and percentage of meat was also determined, in order to see whether 

 long kernels gave more meat than short ones. The correlation coefficients were 

 found to be — 0.10S±0.061 and 0.04±0.057 for the two years, thus showing that 

 there was no relation between length of seed and amount of meat. Correla- 

 tion tables were made on the percentage of meat and weight per bushel, but na 

 correlation was found. . . , The weight per hundred seeds was correlated 

 with the yield for each of the years 1912 and 1913, and the correlation coeffi- 

 cients for the two years are 0.347±0.054 and 0.23±0.054. So far as these 

 coefficients are concerned, while they are not conclusive, there is a tendency for 

 the large seed to be associated with large yield." 



It is noted in conclusion that some of these hybrids and selections, " such as 

 Silvermine selections 120-9 and 125-20, Welcome selection 123-5, and the Gar- 

 ton Tartar King X Clydesdale hybrid 27al-31, have proved to be of value for 

 New York State. 



" Place variation tends to operate to such an extent that variety tests should 

 be continued over several years before definite conclusions may be drawn. The 

 later oats, such as the Lincoln or the Silvermine type, have given better results 

 for this locality than have the early oats, such as Sixty Day. The results show 

 that the yield of straw tends to follow closely the yield of grain, and that varie- 

 ties producing heavy yields of straw usually produce low quantities of meat- 

 The ratio of grain to straw seems to be rather constant from year to year. 

 The weights per bushel for the dififereat years for the same varieties are com- 

 paratively high or low, as the case may be. 



" Weight per bushel depends considerably on the shape of the kernels. A 

 high weight per bushel does not necessarily mean a high-yielding variety. The 

 weight per hundred kernels was found to vary greatly for the different varie- 

 ties. There is a slight tendency for heavy-yielding varieties to have larger seed. 

 The percentage of meat differed greatly for the different varieties. Certain 

 varieties give such a low amount of meat that they should not be grown at all 

 commercially." 



Some varieties and strains of oats and their yields per acre in South. 

 Dakota, A. N. Hume and M. Champlin (South Dakota Sta. Bui. I49 (1914), 

 pp. 347-372). — Classifications and descriptions are given based upon color, time 

 of maturity, and shape of panicle. Tables report the yield of several varieties 

 grown during 190G-1912, inclusive. 



Sixty Day, Swedish Select, North Finnish Black, and Red Algerian were 

 among the best yielders, producing from 23.2 to 43.5 bu. per acre. 



Potato growing- in Washington, O. M. Moebis, J. G. Hall, and M. A. 

 YoTHEBS (Washington Sta. Popular Bui. 62 (1914), PP- 37, figs. 18). — Cultural 

 notes, Including especially methods of treatment for diseases and insect pests. 



The effects of defoliation and the application of nitrates on the composi- 

 tion of the sugar beet, W. P. Headden (Proc. Colo. Sci. 80c. , 10 (1914), PP- 

 415-429). — This reports a study subordinate to that previously noted (B. S. R., 

 28, p. 43). 



It is noted that " the defoliation has very radically affected the assimilation 

 and metabolism of the nitrogen compounds in the beets. This is most marked 



