732 



EXPERIMENT STATION RECOED. 



during each day of the vegetation period, the yields obtained, and other data 

 gathered with regard to the varieties tested. 



Variety tests during' 1907, O. Lemmeemann and P. Liebau {Mitt.Agr. Chem. 

 Vers. Stat. Berlin, 1908, pp. 20). — Data corresponding to the above are reported 

 for 1908. 



The highest yields were obtained from Petkus winter rye, Buhlendorf Yellow 

 winter wheat, Groninger II winter barley, Petkus summer rye, Japhet and 

 Strube bearded summer wheats, Svali3f Chevalier II and Nolc Imperial Type A 

 summer barleys, von Lochow Yellow oats, Kirsche horse beans, von Meyer sugar 

 beets. Yellow Ec-kendorf fodder beets, Lobberrich von Lambert carrots, and 

 Emperor potatoes. The White Queen potato stood highest in yield of starch 

 per acre. 



Cooperative variety tests conducted by county agricultural societies in 

 Sweden, 1909, P. Boon (-E:. Landthr. Akad. Ilandl. och Tidskr., J,9 {1910), 

 No. 7, pp. 591-636). — Three squarehead strains excelled all other wheats in 

 grain and straw yield, but were not tried at many farms, and of the remainder, 

 no variety had a consistent and decisive advantage. Seger and Goldrain usually 

 excelled other oat varieties. Gullcorn and Hanuchen produced higher average 

 barley yields than other varieties tested. Among eating potatoes. Up-to-date 

 and Ever-good excelled other varieties except at 2 centers where Kejsarkrona 

 stood second. Silesia, Fiirst Bismarck, and Brockern led among factory 

 potatoes. A table sums up the results obtained in tests of fodder beets and 

 other root crops. 



Beport of the TJltuna substation of the Swedish seed grain association, 

 1909, A. Elofson {Sveriges Vtsddes-for. Tidskr., 20 (1910), No. 5, pp. 278- 

 288). — Tables state the yields obtained and the weight per bushel and per 

 thousand kernels. Pudel wheat produced the highest average yield during 

 1897-1909, but not all varieties are reported for each year of the test. Of the 

 numerous varieties and improved strains tested during 190&-1909, Petkus rye 

 produced the highest yield, while in an oat test the Fyris and Klockhafre II 

 produced the highest average yields of 3 localities. The results of tests of 

 improved strains of legumes and grasses are also reported. 



Correlation of characters in corn, E. C. Ewing (Netv York Cornell Sta. Bui. 

 287, pp. 67-100, figs. 2). — This is a thesis submitted for the degree of master 

 of science in agriculture. The author reviews the literature of the subject, 

 discusses the use of correlation in breeding, and summarizes previous work. 



Correlation statistics were gathered from about 812 individual plants of 

 Funk Ninety Day corn. The data are reported in correlation tables from which 

 the following coefficients of correlation are derived. 



Coefficients of corrcslation of the weight of grain and certain other corn 



characters. 



Relative character.o 



Diameter of stalk 



Length of leaf 



Breadth of leaf 



Height of mature plants 



Height of seedlings 



Number of internodes 



Average length of internodes 



Percentage of internodes below 

 the ear 



Relative character.a 



Length of ear at appearance of 



silks 



Date of appearance of tassel 



Date of appearance of pollen 



Appearance of silks 



Duration of flowering period 



Number of branches in the tassel. 



Coefficient of 

 correlation. 



0.218±0.033 

 -.1.53+ .023 

 -.090± .024 



- 202± .023 



- 046± .062 

 -.009± .048 



" The weight of grain is subject in each case. 



