How does crushed silicate rock affect pH?

The silicate rock we work with has an alkalising effect on soil, stabilising or raising soil pH. In time, it could even replace lime as a means of making soil pH less acidic. Liming has an immediate effect on soil pH, whereas our rock improves pH over a period of time. Long term, our rock could be a better way of managing soil pH, as it is slow releasing and therefore prevents soil pH from drifting down over time. By maintaining the soil at a slightly higher pH, nutrients like phosphate become more available to plants. This may reduce the need for additional fertiliser.