CONTRIBUTIONS FROM THE WISLEY LABORATORY. 89 



separately on each of the fifteen plots, the heaviest row on each plot 

 being called 100, the other weights being reduced in proportion. 



Table I. — Comparative Weights from Individual Rows in 



Series I. 





Tops. 





Roots. 





Total weight. 





Outer 



Middle 



Outer 



Outer 



Middle 



Outer 



Outer 



Middle 



Outer 



Plot. 



Row. 



Row. 



Row. 



Row. 



Row. 



Row. 



Row. 



Row. 



Row. 



I. 



77 



s8 



IOO 



89 



76 



IOO 



80 



64 



IOO 



II. 



88 



77 



IOO 



69 



83 



IOO 



83 



79 



IOO 



III. 



93 



96 



IOO 



76 



92 



IOO 



87 



94 



IOO 



IV. 



100 



77 



IOO 



IOO 



80 



91 



IOO 



78 



IOO 



V. 



70 



64 



IOO 



73 



62 



IOO 



72 



63 



IOO 



VI. 



89 



70 



IOO 



7i 



76 



IOO 



8l 



73 



IOO 



VII. 



100 



67 



85 



IOO 



73 



89 



IOO 



69 



87 



VIII. 



88 



85 



IOO 



91 



97 



IOO 



89 



89 



IOO 



IX. 



100 



82 



96 



IOO 



83 



93 



IOO 



83 



96 



X. 



100 



82 



97 



IOO 



9i 



96 



IOO 



85 



97 



XI. 



100 



76 



68 



91 



IOO 



71 



IOO 



84 



70 



XII. 



100 



79 



98 



IOO 



75 



75 



IOO 



77 



9i 



XIII. 



96 



79 



IOO 



IOO 



78 



96 



99 



79 



IOO 



XIV. 



92 



90 



IOO 



IOO 



82 



95 



96 



89 



IOO 



XV. 



85 



95 



IOO 



64 



IOO 



9i 



80 



IOO 



IOO 



In two cases only (Plots XI. and XV.) the roots produced by the 

 inner row were of a higher average weight than those of both of the 

 corresponding outer rows; in no case did the average weight of tops 

 from an inner row plant exceed the highest of the corresponding 

 outer rows ; and in only one case did the total average weight of a 

 plant from the inner row equal that of the highest of the corresponding 

 outer rows. 



Series II. — The effect is seen to an even more marked extent in 

 the second series of plots, where the plants were allowed to grow 

 for a longer period and the roots to attain a larger size. 



The second series comprised forty-four plots, each 13 feet by 9 

 feet. The same variety of turnip was sown on July 16 at the rate of 

 3 grams to each row, and the arrangement was in all things similar to 

 that of the first series except that there were four rows 18 inches 

 apart on each plot instead of three. There were thus two rows 

 (Rows 2 and 3 in Table) closed in on each side, and two (Rows 1 and 4 

 in Table) separated by 4 feet 6 inches from the nearest row on the 

 next plot, on each of the plots in the series. 



These turnips were thinned on August 4, and grown on until 

 September 28, when all were lifted, counted, and tops and roots free 

 from earth weighed. The average weight of the plants from each 

 row is set out in Table II., the heaviest row on each plot, as before, 

 being taken as 100. 



Perhaps the most satisfactory basis of comparison between the 

 rows is afforded by the roots, for the weights of these give a fair idea 



