Rothamsted Symposium on Trace Elements 



68 



Their tolerance for excess manganese in the soil may well be 

 caused by a lower intake. Potatoes will generally exceed beans 

 in Mn content. For higher amounts, however, their content will 

 not reach that of the beans, though it will distinctly surpass the 



Tbxtfigure 9.— Manganese con- 

 tent of foliage of healthy and afiFected 

 beans grown on the same field. 



"danger line" for beans. Potatoes, apparendy, tolerate a much 

 higher content of manganese, than beans will stand, without 

 injury. 



