ELECTKO-CuLTrRE . 



been demonstrated. A beneficial effect on clover-hay is prob- 

 able, while that on winter-sown wheat is still uncertain. 



Spring Sown Cereals. 



Difference in Yield per 

 acre nf Electrified Crops 

 compared u-itk Control 

 Crops. 











'1 /•/ 7/ // / 



fip] nfirp 











Bush. 



per cent. 



Lincluden 





1915 



... Oats 



+ 4-8 



+ 30 



:i 





1916 



5) •■• 



+ 11-2 



+ i9 



)•/ 





1917 



11 •" ••' 



+ 0-7 



+ 2 



11 

 ',1 





1918 

 1919 



•1 



... ., ... ... 



+ 26-7 

 + 12-8 



+ 50 

 + 35 



M 





1920 



... 



— 2() 



— <> 



>* 





1920 



... ... ... 



4- 18-S 



+ 57 



Rothamsted 





1917 



... Barley 



(SmalJ plots) 



( + 2-.0)* 



... (+35) 



>• 



... 



1918 





+ 4-4 



+ 10 







1920 





+ 51 



+ 19 



Harper Adam;- 



College... 



1919 



... Oats 



+ 1-0 



+ ^ 





11 



1920 





— 4-3 



— 9 









Meaji 



+ 7-1 



+ 22 







Winter Sown Wheat. 















Bush. 



per cent. 



Rotharasted 





1919 

 1920 



Clover-Hay. 



+ 6-0 

 — 07 



Cwt. 



+ 38 

 — 4 



per cent. 



Rothamsted 





1919 



(1st Crop) 



+ 11-7 



+ 50 







1919 



(2nd Crop) 



4- 4-3 



+ 34 







1920 





4- 0-5 



+ 2 



Harper Adam? 



5 Colle.ire... 



1 920 





— 3-0 











Mean 



+ 3-4 



+ 20 



Pot Culture Experiments. — The object of these experiments 

 carried out at the Eothamsted Experimental Station has been 

 to obtain various data as to the current to be used in electro- 

 culture work on the early vegetative growth of cereals. The 

 subjects investigated have been strength of current, the rela- 

 tive effects of direct and alternating current, and of upward 

 and downward current and the period of the life of the grow^- 



* One result, that of the Rothamsted experiment of 1919 with wheat, has been 

 excluded, tor owing to special conditions the crop was a partial failure, j'ieiding 

 only 8 bushels to the acre. The decrease in jield of the electrified area as compared 

 with the Control was 7 per cent. 



Also in calculating the differences in yield between the two areas, that of iIk' 

 Rothamsted barley plots of 1917 has not been included in determining the average, 

 for the crop was harvested some time before maturity. 



