The nutrient budgeting tool OVERSEER is the result of a long history of collaboration between the government, the fertiliser industry and agricultural scientists. First developed in the 1980's, it is based on many years of scientific research, mostly from New Zealand. It is continually refined and peer reviewed as new science becomes available.

OVERSEER is jointly owned in equal shares by the Ministry for Primary Industries (MPI), AgResearch Limited and the Fertiliser Association of New Zealand (FANZ).


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