More options at:
It is recommended to stay at Wageningen, or the near-by cities: Arnhem and Ede. From those cities, there are direct buses to Wageningen regularly.
Directions from Amsterdam Airport (Schiphol):
You can take a direct train from Schiphol Airport station to Ede central station, where you can find buses to Wageningen (plan your trip via https://9292.nl/en/). You can buy your tickets either at the station or online. Transportation offers can be found here.