the green of the leaves. A little later (in lune) black-grey ill-defined spots appear 

 at irregular intervals in the mesophyll. These spots enlarge, coalesce, and bring 

 about the premature death of the leaves, in extreme cases a pitiable sight meeting 

 the eye — a prematurely denuded squarrulose stem bearing the almost black remains 

 of a lamentable foliage. A kind of enforced ripeness is brought on, along with 

 v^hich comes, hand in hand, a falling off in yield of tubers and starch. It is also 

 worthy of notice that where insufficient potash is present, the number of blossoms 

 is also smaller. 



The results of potash starvation in the various crops as reflected in harvests can 

 be seen from the following table of yields per acre during the last five years: 



* Yield including straw. 



- 32 — 



