cybersix said:I Tend to believe the ph should be above 7. The soil is clay, and these tipes of soil are usually alkaline. So iron is not avalaible for the plants. But... To correct an alkaline soil I read to use some organic fertilizer.. But there are armies of earthworms down there... Is this not enough?
To correct an alkaline soil you would normally use something like sulfur although there are other chemical alternatives. A fertilizer, organic or otherwise, may help somewhat if it is acidifying but not all are. Nor are composts necessarily going to lower a higher soil pH. Acidic peat moss may help but with a clay soil it will be harder to change the pH than with a sandy soil (this resistance is called the soil's buffering capacity), plus you are having to water with alkaline water. I don't think the earthworms will significantly affect the pH.
