Soil type ranging from ironstone loan to odd clay areas , don’t really know how much chalk per ha spread thou but got chance of a lot of itMillions of tonnes of the stuff 4 inches under the surface of the ground here!
What is your soil type and pH? Chalk is a good buffering compound & on high mag clay will be a great source of calcium. Raising the soil pH can cause trace element availability problems but chalk itself doesn't have a huge neutralising value. How much are you thinking of spreading/ha?
https://www.aglime.org.uk/tech/natural_liming_materials.php
@Cab-over Pete