102 



NITROGENOUS MANURES [chap. iii. 



number of plants counted on each plot, which is set out 

 in Table XXXI. 



Table XXXI.— Effect of Manures upon the Number of Roots. 



ROTHAMSTED MANGOLDS, I876-1902. 



In ordinary farming the effect upon the soil is never 

 likely to become so pronounced as in these experiments 

 at Rothamsted, but without a doubt a considerable 

 element in the extra value which the farmer sets on 

 organic nitrogen must be put down to its improvement 

 of the texture of the soil, a factor the farmer rightly 

 regards as of the first importance. 



