Variation and Correlation of Oats — Part I 

 TABLE 1. Climatic Conditions 



11 



January February 



March 



April 



May 



June 



July 



1908. 

 1909. 

 1910. 

 1912. 



1908. 

 1909. 

 1910. 

 1912. 



Rainfall 



2.27 



2.47 



2.24 



3.85 



4.30 



1.26 



2.64 



2.80 



1.78 



3.18 



2.15 



3.97 



3.07 



3.31 



0.30 



3.66 



4.20 



1.14 



1.63 



1.28 



2.73 



2.97 



3.58 



1.37 



Hours of sunshine 



86 

 163 

 129 



127 



133 



152 



163 



346 



84 



165 



197 



231 



298 



133 



244 



216 



231 



259 



178 



182 



172 



280 



359 



Temperature 



4.75 

 1.62 

 1.62 

 2.64 



282 

 337 

 303 

 337 



1908 



25.2 



20.8 



35.0 



44.2 



58.8 



•67.6 



72.7 



1909 



28.0 



30.8 



31.6 



43.3 



55.7 



66.4 



68.6 



1910 



25.3 



23.2 



42.0 



49.8 



54.2 



63.8 



71.4 



1912 



16.6 



21.4 



28.8 



44.5 



58.0 



63.2 



70.9 



in grams, obtained by weighing the kernels produced. (3) Average yield 

 of culm per plant, in grams, obtained by dividing the total yield by 

 the number of culms of the plant. (4) Total number of kernels per 

 plant. (5) Average number of kernels per culm per plant, obtained by 

 dividing the total number of kernels by the number of culms of the plant. 

 (6) Average weight of kernels per plant, in milligrams, obtained by dividing 

 the total weight in gramg of the kernels produced by their total number 

 and expressing the result in milligrams. (7) Average number of spikelets 

 per culm per plant, obtained by dividing the total number of spikelets by 

 the number of culms of the plant. (8) Average number of kernels per 

 spikelet per plant, obtained by dividing the total number of kernels 

 produced by the plant by the total number of spikelets. (9) Number 

 of culms per plant. 



The data for 1908 are the actual determinations for single culms, as no 

 averages for plants were possible because of the method used in taking 

 the data. Items 2, 4, 8, and 9 in the preceding paragraph are not 

 dealt with for that year, and the expression of the other items must be 

 modified to suit the requirements. 



