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yiorges_z5il

chlorosis

yiorges-z5il
13 years ago

I have both a pin oak & river birch with this problem, Chlorosis (Iron deficiency)

1) The illinois soil has a good supply of iron (FeSO4) but the soil pH is 6.8 For the iron to be utilized by these trees the pH needs to be 5.5

2) I wanted to use sulfur to lower the pH but the directions say to "mix the sulfur in the top 6 inches of soil".

3) these trees are in an established lawn and the trees have a caliper of 20 inches or more

4) HOW can I incorpoirate the sulfur under these conditions?

5) There was a sugestion that if the soil pH was lowered more than 1 point it would result in tieing up nitrogen & iron ect.... is this so?

6) tried to contact the supplier of the sulfer (Fertilome) several days ago but no response.

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