The Adapt-Napproach uses computer simulation of soil and crop processes toprovide precise N
fertilizer recommendations. It accounts for the field-specific effects of weather, as well as
localized conditions, including soiltype (texture, soil carbon levels, etc.), soil management
practices (tillage, fertilizer and organic matter applications, etc.), crop management (date of
planting, maturity class, expected yield, population, etc.). It thus allows for incorporation of the
effects of soil change as a result of long-term management practices (e.g. higher N
mineralization on fieldsthat received long
term manure application vs. those on cash
grain farms without manure). It also allows
for adaptation to the impacts of conversion
to no-tillage or increased occurrence of
extreme weather events from climate
change on soil N supply