RELATION OF SOILS TO BLIGHT OCCURRENCE.

Considerable time has been given recently to a study of the character

of the soils in different localities in the State where there is more

or less chestnut blight, to determine whether there is any real

relation between the nature of the soil, and the amount of the disease

in any locality.

Final report of the Pennsylvania Chestnut Tree Blight Commission · 第 84 / 145 题