To make my garden soil less acidic, I have sprayed a 1 percent aqueous solution of dolomite to control the spread of horsetail. Will this measure help me achieve the desired result?
I don't think this solution will have any effect. This is based on my experience where I live so there is still a possibility it will work. Gardening is not a science and results differ widely due to climate, soil types and variation within a species.
- trying to change the ph of your soil by applying acid or alkaline solutions will only cause a short term change in the soil conditions. Unless you amend the soil and add lime or acid yearly pH changes will be minimal
- where I live I am surrounded by limestone. The soil is alkaline and the groundwater is alkaline. The equisetum in my garden seems quite vigorous at a soil pH of 7.1.
This answer on control methods may be helpful.