It is more difficult to lower soil pH (i.e. reduce alkalinity) than it is to raise the pH (i.e. increase alkalinity). Consequently, lowering the pH is only practical in slightly alkaline soils. Where attempts are made to reduce alkalinity, the soil should be checked annually to monitor the change in pH and repeat the treatment if necessary.
To a degree, lime-induced chlorosis (typified by yellowing between the veins) can be rectified by applying sequestered iron in a liquid form, which also contains manganese and magnesium. However, if it becomes apparent this is necessary on an annual basis then serious consideration should be made to either growing the affected plant in a container with lime-free (ericaceous) compost or replacing with plants suited to chalky soils.
On very shallow soils (less than 10cm/4in) over chalk, it may be necessary to increase the growing depth by importing topsoil. For lawns the topsoil depth should be at least 10-15cm (4-6in); for borders 20-30cm (8in-1ft); and for shrub beds >45cm (18in).