These days most regional councils are putting rules in place around what can and can't be done on the land and what level of nutrient run-off is allowable. To make changes and informed choices requires councils and farmers to know what's happening with the soils; do they leach nutrients easily, do they hold water, how naturally fertile are they? This information is contained in a soil map but surprisingly few farmers have one. And even councils like Waikato Regional Council, which is funding the production of new digital soil maps, won't have the whole region surveyed for another seven years.